energy Related Articles

Overview: This article discusses the challenges faced by smart grids. It also briefs on how the Energy Internet and the use of blockchain and IoT technologies are potential solutions to smart grid security challenges. A decade ago, the idea of a "smart grid" was the foundation of bright dreams, now, it's the most talked-about issue in the industry of renewable sources. The smart grid is a multidimensional energy infrastructure idea that can be implemented using a wide range of available technologies. The incorporation of a "smart grid" into today's electrical infrastructure is crucial for the following reasons: What are the challenges faced by smart grids?Skepticism Among Industries First of all, industries are still hesitant about the advancement of smart grid projects. The misconception among industries is that government commitments cannot be fulfilled and that smart grid projects are moving slowly forward. Furthermore, despite the fact that governments fund the creation and testing of smart grid pilot projects, the industries engaged in the installation of these projects have little passion for investing in the technology, which has an impact on the system's development. Security Issues Second, there are numerous security risks and associated difficulties that can affect the architecture and infrastructure of smart grids. Threats and difficulties include terrorism, theft, disasters caused by nature, and cyberattacks. An actual security breach may result inPower outagesA breakdown in the information and technology infrastructureDisruption in the power marketNetwork cascade failureEndanger human safety In summary, issues with technology privacy, permission, and authentication are identified as smart grid security challenges. The Energy Internet may also have similar problems, but using technologies like blockchain and the Internet of Things (IoT) should make security breaches less likely and less harmful, and they should also make recovery easier with little assistance from humans. Decreased Penetration of Electric Vehicle Thirdly, a barrier to the widespread use of electric vehicles in the energy sector is the low market penetration of these vehicles with vehicle-to-grid (V2G) capability. Repeated charging and discharging of the battery is necessary for effective V2G operation, which results in battery deterioration. Even though scientists are optimistic about lithium-ion (LFP) batteries, more study is needed to determine how to maximize the battery life of V2G-enabled vehicles for the technology to be implemented effectively. Complexities Posed by Microgrid Fourth is using micro-grids to improve smart grids. The installation of microgrids with smart grids presents few technological and regulatory hurdles. Inbalanced supply and demand can lead to issues with frequency and voltage in microgrids. When generators are connected and disconnected using a "plug-and-play" feature, these issues may worsen. Variations in the power production from the connected renewable energy systems make it difficult to maintain a steady state for the microgrid. Furthermore, a greater proportion of renewable energy could cause transmission and distribution difficulties in the current network. The incorporation of suitable protection devices becomes essential as the system becomes more complicated. Because micro-grid infrastructure comprises a bi-directional power flow, the protection mechanism differs from standard power systems. Additional information on micro-grid protection schemes should also be considered. Development of Strandards Lastly, it is necessary to address the issues raised by the regulation of communication devices, cyber-security devices, and compatibility and conformity to standards. Countries have assigned various groups the task of creating standards for smart grid interoperability. The design, development, and production of devices that meet international standards is one of the main obstacles to deploying smart grid infrastructure. The Energy Internet The Energy Internet is allegedly able to solve many of the aforementioned problems. It serves as the energy system's forthcoming revolution. It will make it possible to put less focus on large-scale centralized power generation and more on numerous tiny, dispersed generation systems. Government investment in generating facilities may be minimized as a result of prosumers now owning a larger portion of the power generation industry. Households and other small-scale users who can construct local power plants to buy and sell electricity are encouraged to invest via the Energy Internet. By doing this, governmental organizations' investment burden is lessened when they spend on building infrastructure. It provides advanced capabilities to facilitate flawless electricity exchange through the Energy Internet. Current security threats and challenges are addressed when this infrastructure is supported by innovative technologies like blockchain and IoT. However, as technology develops, new security threats are probably going to appear, and ongoing cybersecurity innovations are going to address them. Research in the field of Energy Internet helps optimize storage devices to reduce battery wear. The Energy Internet can also use distributed energy systems management algorithms to best address ongoing smart grid issues brought on by the unpredictable and variable nature of renewable energy systems. Future integration of artificial intelligence (AI) and machine learning (ML) algorithms into the Energy Internet, which provide additional support. Lastly, government agencies must coordinate with other relevant international entities to address the concerns of standardization and interoperability. Energy Internet can fill up the gaps left by the smart grid's shortcomings. Management of Energy Internet Markets The markets for green gas, liquid fuels, and renewable heating in the future will affect the power market. The Energy Internet has the ability to reconfigure itself into a multi-energy system in this regard. A fully operational energy market for the energy cells can be integrated into the Energy Internet architecture. As an illustration, the current electricity exchanges in some countries operate using an auction-based bidding system. This technique works well in static liberalized markets where it is simple to predict the market structure and network architecture. Energy cells that are integrated with the Energy Internet, however, are diverse in character and have competing objectives. Auction-based bidding might not be an effective market mechanism given this feature. Game-Theoretical Algorithms A real-time power price that reflects the dynamic supply and demand balance is one potential option. The selection of game-theoretical algorithms to establish an appropriate real-time pricing mechanism for trading among energy cells on the Energy Internet is one suitable option. Game theory models have been used to examine studies that deal with disagreements involving interactive decision-makers. In recent years, the scalability of game-theoretic algorithms has facilitated their widespread use in energy market design. The mathematical model for the day-ahead market for the competitive energy cells was developed using the Nikaido-Isoda function (NIRA) and the Relaxation algorithm. For more than three decades, businesses have relied on a specific group of numerical algorithms known as relaxation algorithms. Earlier efforts in the relaxation method greatly illustrate the technique's quick convergence and reasonable accuracy. The bilateral Shapley value and kernel are used to make sure that profits are shared fairly among consumers who work together. Blockchain Technology Virtually anything of value can be recorded in the blockchain, an uncorruptible digitally distributed ledger of economic transactions. The shared ledger that is published to every member is the foundation of how blockchain technology operates, as shown in Fig. 1. Fig. 1. Centralized transaction vs. blockchain transaction Source: IEEE Access It uses smart contracts to make sure that participants follow the rules, a distributed consensus method to make sure that everyone agrees on the proposal, and cryptography-based safety measures to make trade easier. As a result, it offers the customer a private cybersecurity solution that is strong and resilient. Additionally, blockchain reduces the possibility of double-spending that comes with digital currencies. The computation-intensive algorithm is necessary to mitigate the possibility of double-spending. New blocks are added to the blockchain, and transactions are validated using this computational technique. Specialists compete with one another to solve problems and validate these transactions. Additionally, blockchain offers attributes likeTransparency, which makes data easily auditable,Redundancy, which distributes a copy of data to all participants to prevent third-party malpractice,Immutability, which makes record alteration exceedingly difficult,Disintermediation, which does away with intermediaries like banks or energy utilities,Blockchain technology offers continuous traceability of all energy transactions as well as a comprehensive transaction record for the energy markets. But there are still some issues with the technology. Among the difficulties are those related toDigital data and metadata storageNetwork effect problemsCopyright disputesLegal concernsSummarizing the Key Points The Energy Internet can address ongoing smart grid issues brought on by the unpredictable and variable nature of renewable energy systems.Prosumers owning a larger portion of the power generation industry can minimize government investment in generating facilities.Blockchain and IoT technologies can make security breaches less likely and less harmful, and they should also make recovery easier with little assistance from humans.Disintermediation and blockchain technology offer continuous traceability of all energy transactions as well as a comprehensive transaction record for the energy markets.Difficulties related to digital data and metadata storage, copyright disputes, network effect problems, and legal concerns still exist with blockchain technology.Reference Joseph, Akhil, and Patil Balachandra. “Smart Grid to Energy Internet: A Systematic Review of Transitioning Electricity Systems.” IEEE Access 8 (2020): 215787–805. https://doi.org/10.1109/access.2020.3041031.

Overview: The article discusses the SC robustness, surge energy, and overvoltage robustness of GaN HEMTs. Additionally, the article highlights recent achievements in ultrafast SC protection circuits and alternative circuit approaches. For many applications, including motor drives, automobile powertrains, and electric grids, the ability of power devices to stand up to overvoltage, overcurrent, and surge-energy events is a crucial need for robustness. For Si and SiC power transistors, UIS (avalanche) and SC tests are typically used to measure robustness.  Does gallium nitride possess SC robustness? It is known that GaN HEMTs lack avalanche capabilities and have restricted SC robustness. Furthermore, compared to Si and SiC devices, GaN HEMTs behave considerably differently in terms of stress tolerance and failure under specific out-of-safe-operating area situations.  The SC robustness, surge energy, and overvoltage robustness of GaN HEMTs will be discussed. Fig. 1 shows an illustration of GaN SP-HEMT and GaN HD-GIT.Fig. 1. Illustration of (a) GaN SP-HEMT and (b) GaN HD-GIT. Source: IEEE Transactions on Power Electronics SC Robustness When there is a conduction path with minimum resistance between the power source and the switching transistor, SC fault occurrences take place. SC events typically drive devices into saturation mode, which stresses the device with high voltage and high conduction current. Objectives Standard SC robustness criteria are:10 μs SC withstanding time (tSC) under the bus voltage (VBUS) The driving conditions must be identical to the application-use operation.Note: The U.S. Department of Energy 2025 Vehicle Drive Roadmap states that a 2 μs tSC of the power device along with the ultrafast protection circuit is required if the 10 μs tSC is not achievable. Types of SC Robustness In power electronics systems, there are typically four types of SC situations that can occur: Arm SC, also known as the hard-switching fault (HSF) or SC type ISeries arm SCOutput SCGround SCHSF is typically used in these situations to assess the robustness of the SC power device. The findings of repeated SC tests, failure modes, and single-event tSC for GaN HEMTs are compiled in this section. Reasons for Restricted SC in GaN HEMT A lot of work has been done to figure out what limits the SC capability of GaN HEMTs, especially when the bus voltage is high. Devices fail thermally in long SC duration tests with low bus voltage. At high bus voltages, several reports point to an electrical failure.  It is suggested that the high electric field produced by the hole accumulation beneath the gate—where the holes are produced by impact ionization—may be the reason for the SC failure. The relationship between electric field crowding at the drain-side gate edge and the high carrier density caused by the SC has been reported. A wafer-level transient voltage measurement keeps track of the potential profile in the gate-drain region under SC stress.  It is found that the failure is dependent on the speed at which the electric field propagates; impact ionization causes the failure when a high electric field reaches the drain edge. Results of Repetitive SC stresses on GaN HEMTs It has been documented that GaN HEMTs are not sufficiently robust to repetitive SC stresses within the single-event SC SOA. In SP-HEMTs, the repetitive SC stresses cause a decrease in drain-leakage currents and a rise in on-resistance (RDS,ON) at lower bus voltages. All of these parametric shifts point to the possibility of electron trapping during the repetitive SC operation in the buffer and gate areas. In HD-GIT repetitive SC tests, the progression of developing cracks and aluminum extrusion at this load has been seen.In cascode HEMT, two additional strategies have been identified to constrain the SC robustness The first thing that can happen is that the parasitics of the Si-GaN chip interconnection can cause the self-sustained gate oscillation to excite. This can make the GaN HEMT turn on by accident and fail. Secondly, the cascode HEMT's thermal self-regulation capability on the gate control is lower than that of HD-GITs and SP-HEMTsMethods to Overcome SC Faults Protection circuits must be included for applications where the SC fault may arise due to the short SC withstanding time of contemporary GaN HEMTs. Within 100–200 ns, the protection circuit should identify the issue and clear it. Conventional desaturation circuits have a long response time, which makes it difficult to achieve this. Ultrafast SC protection circuits for GaN HEMTs have recently been achieved by several groups. These circuits typically exhibit fault detection and clearance times of less than 100 ns. Some other good qualities that have been talked about are strong dv/dt noise immunity, use with parallel-connected GaN HEMTs, and monolithic integration with the GaN device. Alternative circuit approaches to improve the SC capability in addition to quick protection are also suggested, such as coupling the GaN HEMT to a Si mosfet.Device-level enhancements have also been reported to enhance the SC withstanding time of GaN devices, in addition to circuit techniques. Removing parts of the 2DEG channel along the width of the GaN HEMT is an easy way to minimize the saturation current. With this method, an SC withstanding time over 3 μs is possible in industrial cascode GaN HEMTs. Surge Energy Power devices would greatly benefit from the ruggedness against surge energy in addition to SC robustness. Si/SiC MOSFETs and IGBTs have relied on their avalanche ability—an impact ionization and multiplication effect—to support high current at high drain-to-source bias. Why is surge energy important for power devices? When devices are exposed to surge energy, drain-to-source bias quickly climbs to and clamps at avalanche breakdown voltage. Avalanching in the device causes the drain current to decrease to zero and the surge energy to be resistively dissipated. The dissipation of energy stops converters from circulating energy further. For this reason, avalanche ruggedness is another name for surge-energy ruggedness. An essential indicator of device robustness is avalanche energy, which is the maximum energy that a power device can dissipate without causing a thermal runway. Surge Energy in GaN HEMTS However, the intrinsic avalanche capacity is absent from GaN HEMTs. The JEDEC JC 70 committee has just identified their surge-energy robustness as a crucial evaluation problem. GaN HEMTs show a quick rise in drain-to-source bias when they are exposed to surge energy. This is because of the resonance between output capacitance and parasitic inductance in the circuit.  This standing process cannot release energy until the resonance voltage drops, which causes the GaN HEMTs to turn on in reverse. The device's overvoltage margin is the principal cause of electrical failure in the withstand process.  The convergence of overvoltage and surge-energy robustness for GaN HEMTs is demonstrated in the discussion above. GaN HEMTs can generally tolerate higher surge energies at the expense of slower switching speed when they are constructed with a larger output capacitance and a higher dynamic breakdown voltage. Any nonavalanche power device can be designed or chosen with this tradeoff in mind for a variety of applications. Summarizing the Key PointsUIS (avalanche) and SC tests are typically used to measure the robustness of Si and SiC power transistors. GaN HEMTs lack avalanche capabilities and have restricted SC robustness compared to Si and SiC devices. Standard SC robustness criteria include 10 μs SC withstanding time under the bus voltage and identical driving conditions to the application-use operation. Recent achievements in ultrafast SC protection circuits for GaN HEMTs and alternative circuit approaches have improved SC capability. And, device-level enhancements have been reported to enhance the SC withstand time of GaN devices.Surge energy, which is the maximum energy that a power device can dissipate without causing a thermal runway, is also important for power devices in addition to SC robustness since it is an essential indicator of device robustness.GaN HEMTs can generally tolerate higher surge energies at the expense of slower switching speed when they are constructed with a larger output capacitance and a higher dynamic breakdown voltage.ReferenceKozak, Joseph Peter, Ruizhe Zhang, Matthew Porter, Qihao Song, Jingcun Liu, Bixuan Wang, Rudy Wang, Wataru Saito, and Yuhao Zhang. “Stability, Reliability, and Robustness of GaN Power Devices: A Review.” IEEE Transactions on Power Electronics 38, no. 7 (July 2023): 8442–71. https://doi.org/10.1109/tpel.2023.3266365.

Overview: The article discusses the rapid growth of renewable energy resources, particularly photovoltaic and wind turbines, as the most attractive power generation options due to strong government incentives and encouragement to use green energy. Over the past ten years, the use of renewable energy resources has grown rapidly throughout the world. Renewable energy sources, especially photovoltaic (PV) and wind turbines (WT), have emerged as the most attractive power generation options.Challenges in Renewable Energy Based Power SystemsThe installed wind turbine capacity increased from 540 GW to 591 GW between 2017 and 2018, while the installed solar photovoltaic capacity increased from 405 GW to 505 GW. The output of the photovoltaic and wind turbines exhibits unstable characteristics because it is heavily dependent on weather factors such as wind and cloud movement. The utility grid faces significant technical challenges with regard to power quality, generation dispatch control, and grid reliability as a result of the substantial penetration of these types of intermittent renewable energy sources. As a result, operators of renewable energy plants will face pressure to deliver consistent power, much like conventional fossil fuel power plants have done. Overgeneration and restrictions are the grid operators' growing concerns as more photovoltaic and wind turbines are connected to the grid. There are primarily two reasons for the curtailment of renewable energy, namely regional supply excess and regional transmission constraints. Although higher levels of curtailment have also been reported, the typical range of curtailment levels for wind generation is between 1% and 4%. When rigid traditional generators, like nuclear and coal plants, are unable to be used to generate lower power, negative pricing and the curtailment of renewable energy generation occur. The duck curve, which is depicted in Fig. 1, can be used to show the enormous difficulty of incorporating solar and wind energy as well as the likelihood of overgeneration and curtailment. Fig. 1. Duck curve illustration. Source: IEEE AccessThe Idea of Hybrid Power SystemsIt is generally accepted that any individual wind or solar source cannot sustainably power a load. It should also be noted that the hours of maximum output for wind and solar systems vary throughout the day and the year. The weather and climate patterns actually make solar and wind energy resources mutually beneficial. Thus, on a seasonal or daily basis, the energy produced by wind-photovoltaic resources keeps reversing. Since photovoltaic and wind turbines have benefits that complement one another in terms of power profiles, the hybrid utilization of the two should receive more attention. It is possible to develop hybridization techniques to deal with the intermittent nature of solar and wind power.Wind-Solar Hybrid Power SystemsThe wind-solar hybrid power system (WSHPS) combines photovoltaic and wind turbine subsystems to boost overall system efficiency, reduce energy storage capacity needs, and make the power grid more reliable. Wind-solar hybrid power systems are better than single photovoltaic or wind turbine systems in deficient utilities because they can compensate for unwanted intermittent variations with a single renewable energy source. In addition, the wind-solar hybrid power system can help the points of generation and consumption be adjacent to each other, which reduces infrastructure costs, particularly for rural electrification projects. As a result, wind-solar hybrid power system schemes at a single location are becoming a prominent trend in the worldwide transition to renewable energy. Voltage and frequency regulation, the mismatch between generated power and load demand, grid operation economics, and the scheduling of generation units are just some of the difficulties associated with the incorporation of large amounts of intermittent renewable energy into the utility. Therefore, grid operators must take extra measures to guarantee the reliability of the system. Because of the addition of solar and wind energy to the grids, fossil fuel generators, for example, need to be switched on and off or have their outputs adjusted more frequently to account for power fluctuations. In addition to raising maintenance costs, frequent cycling of fossil fuel generators also reduces efficiency. With high solar penetration, the cost of cycling ranges from $0.47/MWh to $1.28/MWh per fossil-fueled generator. Therefore, the aforementioned economic challenges necessitate a constant power dispatch commitment from the wind-solar hybrid power system framework at an acceptable interval.Energy Storage SystemsAdding the energy storage system (ESS) to the wind-solar hybrid power system framework will further mitigate the risks associated with renewable energy sources. In particular, the energy storage system makes it possible to provide supplementary services like voltage regulation, frequency regulation, harmonic reduction, transient stability, and load leveling. There are a variety of energy storage systems on the market, but two of the most popular are batteries and supercapacitors (SC). The characteristics of the battery and supercapacitors are compared in Table 1. There are many similarities between the supercapacitors and the conventional capacitors, with the main differences being the supercapacitors' smaller size and longer lifespan. Table 1: Battery and SC Performance Comparison Source : IEEE Access The battery energy storage system (BESS) has a low-power ramp rate, which indicates that the BESS charging-discharging rates are insufficient to meet peak or pulse load demand despite its high energy density property. The energy density is low, but the power ramp rate is high in the supercapacitor energy storage system (SESS). So, the supercapacitors can't keep up with the load for as long as it's needed. It's obvious that neither of these energy storage systems has both a high power density and a high energy density. Therefore, if only one kind of energy storage system is deployed to meet both the power and energy capacity specifications, a high installation cost may be needed to meet both the energy and power capacity needs.Hybrid Energy Storage SystemTherefore, a cost-effective energy storage system can be developed through the use of a hybrid energy storage system (HESS) consisting of a battery energy storage system and a supercapacitor energy storage system, with the supercapacitor facilitating the fast-changing power components passing through the battery, which increases the service life of the battery.Hybrid Energy Storage for Wind-Solar Hybrid Power SystemsThe main goal is to improve the way that renewable energy is used so that the wind-solar hybrid power system output power can be sent to the power grid every hour for a whole day, as desired. For this, the wind-solar hybrid power system architecture incorporates a hybrid energy storage system made up of lithium-ion batteries and supercapacitors, which can store the collected wind-solar hybrid power system energy and transform the intermittent energy into a reliable supply that can be dispatched when needed.Dispatching SchemeTo provide the wind-solar hybrid power system's output power to the utility grid, a dispatching scheme has been employed rather than the conventional peak shaving or smoothing approach. The wind-solar hybrid power system can be regulated like other conventional generators, such as thermal and hydropower plants, because of the utility's dispatching scheme. When combined with the dispatched scheme by which wind-solar hybrid power system output power is supplied to the grid, this flexibility extends to the utility grid in many ways, including the scheduling of generation units, the economics of grid operation, and the provision of grid ancillary services.Low Pass FilterA low pass filter (LPF) is used to split the energy produced by the hybrid energy storage system into two groups: the SC group receives power with a fast-dynamic response, while the battery group receives power with a slow-dynamic response. The battery's lifespan is increased by using this method because it helps the battery avoid rapid charging and discharging cycles and a large discharge current. In addition, the most cost-effective hybrid energy storage system for hourly dispatching of the wind-solar hybrid power system power scheme is sought by using curve fitting and Particle Swarm Optimization (PSO) techniques. The goal is to minimize the cost of the hybrid energy storage system while keeping the energy storage system's state-of-charge (SOC) within a certain range and meeting the power demand during each dispatching period.Summarizing the Key PointsRenewable energy resources, particularly solar and wind, have grown rapidly due to strong government incentives. The output of these energy sources exhibits unstable characteristics due to weather factors such as wind and cloud movement. Hybrid power systems that integrate wind and solar energy can maximize the potential of renewable energy. Technical challenges in photovoltaic and wind turbine power systems need to be addressed to overcome the unstable characteristics of renewable energy. The integration of energy storage systems can help mitigate the variability of renewable energy sources.ReferenceRoy, Pranoy, Jiangbiao He, and Yuan Liao. “Cost Minimization of Battery-Supercapacitor Hybrid Energy Storage for Hourly Dispatching Wind-Solar Hybrid Power System.” IEEE Access 8 (2020): 210099–115. https://doi.org/10.1109/access.2020.3037149.

Overview: This article explores the integration of smart grids, renewables, and communication technologies in the energy sector. It highlights the importance of energy storage systems, home energy management, and electric vehicles. The incorporation of a "smart grid" into today's electrical infrastructure is essential. Notable studies in the field of smart grids that relate to the Energy Internet can be broken down into the various subfields that will be covered below.Home Energy ManagementWith the aid of home energy management systems, the consumer can monitor the energy usage of each appliance in their home and make changes as necessary. The Energy Internet can be managed and operated by household energy cells through a home energy management system. Traditional energy infrastructure typically sends customers monthly bills detailing their energy consumption. The Energy Internet's home energy management systems offer a wealth of data, including consumption data, electricity generated locally via rooftop solar PV, current market rates, and storage capacity, all in real-time. Smart home energy management systems are built on a foundation of connected appliances, controls, networks, and displays. Home energy management systems provide feedback on energy use and other smart features. Consumers can make choices about their energy usage via in-home displays. For instance, Smarter Homes is a company that installs home energy management technologies to control solar rooftop PV, storage devices, and home appliances through the use of the internet of things and consumer electronic devices like iPads and Amazon Alexas. Energy management systems for the home make it easier to connect energy storage to the home's electrical network. An effective home energy management system is necessary for the envisioned energy internet to enable extensive energy trade.The Concept of Vehicle-to-Grid (V2G)Rechargeable batteries and an electric motor provide the power for plug-in electric vehicles. An energy port installed in a home or public space supplies power to a rechargeable battery. If electric vehicles are managed in a distributed fashion along with other electrical loads, they can play an important role in the demand-side management of the smart grid. When compared to stationary energy storage devices, electric vehicles have the distinct advantage of portability, as they can be driven from one location to another. Therefore, vehicle-to-grid and grid-to-vehicle initiatives can't be carried out without the widespread adoption of electric vehicles. Range anxiety is the key factor in determining how many people will sign up for vehicle-to-grid programs. Thus, even in developed nations, the rate of adoption of electric vehicles is low. But from the perspective of the power grid, vehicle-to-grid provides a variety of useful ancillary services, such as peak load management and voltage and frequency regulation. Even privately owned electric vehicles parked in a parking lot can contribute significantly to grid power during periods of inactivity with minimal disruption to the owner. Despite these advantages, people still have doubts about vehicle-to-grid. A lack of knowledge about vehicle-to-grid technical aspects is cited as the cause of this doubt. Policy-wise, many nations lack a well-developed plan for vehicle-to-grid. On the technological side, researchers are focusing on planning the distribution infrastructure to incorporate vehicle-to-grid and planning the vehicle-to-grid infrastructure to optimally operate the distribution network.Renewable Energy Integration into Grid and Distributed GenerationWith the help of a smart grid, renewable energy sources can be easily incorporated into power transmission and distribution systems. Due to the high cost of extending the power grid to rural areas, the electrification process in many countries is on hold. Research into completely independent island energy systems has been going on for a long time. The decentralized storage systems can guarantee a safer energy supply than large centralized systems. Such a system can use V2G technology to take advantage of renewable energy's full potential while also regulating peak demand. Surprisingly, the incorporation of renewable energy can resolve the challenging energy-water nexus that island nations face. For these countries, going from a state of "full input of energy and water" (FIEW) to "zero input of energy and water" (ZIEW) means they can stop relying on the mainland for their energy and water needs. The decarbonization of centrally managed energy systems and the installation of distributed energy systems with renewable energy as their main source are accelerating the transformation of the energy landscape. Based on the basic principle of incorporating distributed energy sources, controllable loads, and storage devices, the concept of a micro-grid has emerged. However, due to the fluctuation and interruption issues of renewable energy systems, managing distributed energy sources in the microgrid is a challenging task. Multi-agent-based approaches are able to handle such complexities. Distributed generation has many benefits, including efficiency gains, reduced carbon emissions, and the delaying of costly transmission line upgrades and expansions. The numerous economic, technological, and environmental advantages of distributed generation have led to its widespread acceptance as the future power paradigm. Additionally, unlike large traditional grids, distributed energy systems that are connected to small-scale generators can respond more quickly and effectively to changes in load curves. So, one of the primary goals of ongoing smart grid research and development activities is to better integrate distributed generation resources into the grid.Energy Storage SystemsFaster adoption of renewable energy sources and smart grids relies heavily on electric power storage facilities. Because of their high price and low efficiency, traditional energy storage systems were not particularly useful, relevant, or functional. It is crucial to take advantage of renewable energy generation and storage in order to set up a fully functional and optimized dynamic grid. The development of these industries requires the formulation of a crucial set of financial and regulatory policies. Devices that store and release energy can meet peak power demands without using additional, costly forms of generation. In addition, storage devices can play a crucial role in enabling cost-effective, efficient, and environmentally friendly operation of the distribution network by offsetting the demand and supply mismatch.Communication TechnologiesThe term "advanced metering infrastructure" (AMI) refers to the combination of "smart" meters, "communication networks," "meter data management systems," "software platforms," and "user interfaces". Through AMI, the utility and the end-user are able to have a two-way interaction about the end-user's energy consumption as well as the utility's price signals and load-control signals. The evolution of the smart grid’s communication technology is shown in Fig. 1.Fig. 1: Smart Grid Evolution Source: IEEE AccessThe data is sent to a centralized server, where it is stored and processed. Therefore, there must be a means of communication established that allows for the free flow of data. The information exchange channel is two-way communication. The utility's capacity for asset maintenance, energy demand management, and energy planning can all be managed through two-way communication. It is anticipated that AMI will become "smarter" in the future. It is predicted that in the near future, consumers will opt for Artificial Intelligent Meters (AIMs) that can regulate their power usage independently, irrespective of external signals. AIM also reduces the amount of human involvement in particular decision-making processes. With computational power and channel bandwidth being limited factors, it is difficult to provide a lightweight communication architecture for the transmission of big data that can quickly respond to network congestion and management requirements. As a result, many different algorithms for transmitting large amounts of data are currently under development.Summarizing the Key PointsSmart grid research aims to integrate distributed generation resources into the grid for improved efficiency and functionality. Energy storage systems are crucial for the adoption of renewable energy sources and the optimization of the dynamic grid. Electric vehicles have the advantage of portability and can contribute to the grid through vehicle-to-grid initiatives. Range anxiety and lack of knowledge hinder the widespread adoption of electric vehicles and vehicle-to-grid programs. Communication technologies play a vital role in enabling the flow of data and information exchange in the energy sector. Advanced metering infrastructure (AMI) enables two-way communication between utilities and end-users for efficient energy management. Artificially Intelligent Meters (AIMs) are predicted to become smarter, reducing human involvement in decision-making processes.ReferenceJoseph, Akhil, and Patil Balachandra. “Smart Grid to Energy Internet: A Systematic Review of Transitioning Electricity Systems.” IEEE Access 8 (2020): 215787–805. https://doi.org/10.1109/access.2020.3041031.

Overview: This article explores the opportunities and challenges of integrating clean technologies and information and communication technologies for efficient and sustainable energy management in smart grids.  Decarbonization has accelerated the fundamental shift in society toward clean technologies. Electrical energy will be a significant factor in the decarbonization process. Electrical energy is one of the most common forms of energy carriers and is seeing growing usage. Increasing electricity demand forces the expansion of the generation and transmission systems, requiring a significant amount of investment.  Power loss and reactive power flow in the transmission systems make the conventional, centralized structure of power systems less efficient. Distributed generations (DGs) have been incorporated into low- and medium-voltage distribution networks in order to increase system availability, efficiency, and cost-effectiveness. Furthermore, renewable-based distributed generation aids in the decarbonization of the electric energy sector.Evolution of Smart GridDistribution systems that have been powered up can function as a microgrid in the absence of the utility grid. A microgrid is an island-based distribution system that uses local distributed generation and energy storage to provide critical loads in island mode. Distribution systems with microgrid capabilities will have some benefits, such as increased productivity, dependability, accessibility, and power quality.  However, information and communication technologies (ICTs) are necessary for the optimal and reliable operation of various distributed generation and energy storage systems in microgrids. To operate modern energy distribution systems as efficiently and dependably as possible, the smart grid concept has been introduced. To operate and plan grid systems with irregular output and variable power sources, ICTs must be available at both the generation and transmission levels. These systems enable power systems to meet customer demands by intelligently monitoring, making decisions, and controlling contemporary power systems. In addition to incorporating DGs into distribution networks, large-scale renewable power plants like photovoltaic (PV) and wind energy systems have been widely installed in power systems, and the power grids are currently moving toward more fully renewable energy systems. Figure 1. Concept of a Distributed Power Generation System Source IEEE Access Along with efficiency, flexibility, and operability benefits, smart grid technologies also present new difficulties for the design and management of modern power systems. Restructuring the power grids to incorporate renewable energy sources, microgrid technologies, ICTs, and power electronics can result in these difficulties. Smart Grid’s Future DirectionsThe idea of smart grids has changed with the development of technology. In recent years, the smart grid's research and development have increased. As a result, the implementation of smart grids has changed from virtual to real-time. However, there are several situations in which action needs to be taken to turn it into a complete real-time network service.Big Data ManagementThe input of real-time data is a key factor in a smart grid. It serves as the backbone of the network's functioning. Power transmission, generation, transformation, and utilization data are being collected for reliable and efficient working. All decisions are made based on the information gathered. The collection and management of such a vast amount of real-time data is a significant problem.  To predict the demand for energy at various locations, the algorithms must use all the data gathered from the sensors and associated devices. To produce the best results, the algorithms must be optimized. One of the main study subjects in smart grid technology is IT infrastructure, data gathering, governance, data processing, and, most critically, data security.Investing in Smart Grid InfrastructureTo reduce carbon emissions, a number of countries have started implementing smart grid infrastructure. Many of them are engaged in projects designed to evaluate the feasibility of the network. The construction of the smart grid infrastructure has already started in nations including Australia, South Korea, and Japan. The initial investment, though, is the main concern. The ongoing maintenance of the entire network further raises the overall cost.  Therefore, before making an investment of this size in the infrastructure, a thorough financial report should be made. The price of smart grids in a few emerging nations is shown in Table 1. This will estimate the starting sum that a developing nation must invest in order to create smart grid infrastructure. Additionally, it will provide a general concept of the maintenance costs as well as any other extra expenses necessary to guarantee the network's efficient operation.Business Model RestructuringThe business model has undergone considerable adjustment as a result of the new smart grid's emergence. New technologies have altered consumer perceptions and created a network of distributed power sources. Consequently, business practices are evolving. It is necessary to implement new policies to benefit consumer communications. To integrate the load and the generated power, the utility business model should be put into practice at the distribution level.Modernization of the Energy Production SystemCustomer needs have evolved due to the smart grid's evolution. As a result, there are fluctuations in energy demand. To accommodate the demand response, the system's capacity should be raised. Additionally, the energy-producing systems must change their production policies to integrate into the smart grid network. In the smart grid network, cloud-based data management strategies are applied. The existing system needs to be upgraded and changed in order to establish IoE activities.  Cyber-physical power systems are the smart operation of future power systems, which include distributed generation, microgrids, and demand side management while utilizing information and communication technologies over the physical system. The ICTs are vulnerable to cyberattacks, data loss, and hardware failure. ICT malfunctions will reduce system performance and must be taken into account when planning a power system. Additionally, when operating power systems, cybersecurity must be taken into consideration because malicious intrusions from cyberattacks could result in a loss of power or energy. The network should incorporate security measures against cyberattacks.Summarizing the Key PointsThe paper highlights the importance of information and communication technologies in the optimal and reliable operation of distributed generation and energy storage systems in microgrids.The integration of information and communication technologies with power systems can lead to the development of cyber-physical power systems or smart grids.Smart grids enable power systems to meet customer demands by intelligently monitoring, making decisions, and controlling contemporary power systems.However, the adoption of clean technologies and information and communication technologies presents new challenges for the design and management of modern power systems.Smart grid technologies also present new difficulties for design and management but offer significant benefits such as flexibility, efficiency, operability, reliability, accessibility, and power quality. Reference(s)1.Peyghami, S., Palensky, P., & Blaabjerg, F. (2020). An Overview on the Reliability of Modern Power Electronic Based Power Systems. IEEE Open Journal of Power Electronics, 1, 34–50. https://doi.org/10.1109/ojpel.2020.29739262.Pal, R., Chavhan, S., Gupta, D., Khanna, A., Padmanaban, S., Khan, B., & Rodrigues, J. J. P. C. (2021, August 28). A comprehensive review on IoT‐based infrastructure for smart grid applications. IET Renewable Power Generation, 15(16), 3761–3776. https://doi.org/10.1049/rpg2.122723.Rafique, Z., Khalid, H. M., & Muyeen, S. M. (2020). Communication Systems in Distributed Generation: A Bibliographical Review and Frameworks. IEEE Access, 8, 207226–207239. https://doi.org/10.1109/access.2020.3037196   

Overview: This article overviews communication technologies in smart grid infrastructure, focusing on electric vehicle charging protocols and standards. CatalogSmart Charging SystemCommunication Technologies in Smart Grid InfrastructureSummarizing with Key Points Smart Charging SystemTo develop a power distribution network that is both more effective and more environmentally friendly, the possibility of combining electric vehicles with smart grid technologies plays a significant role. A component of smart grids known as vehicle-to-grid (V2G) enables electric vehicles to not only receive power from the grid but also feed excess energy back into it when they have it available. The convergence of electric vehicles and smart grids has the potential to revolutionize the energy business while simultaneously lowering carbon emissions.Fig. 1 . Overall charging system for battery electric vehicles using wired/wireless charging technologies. Image used courtesy of IEEE Access Communication Technologies in Smart Grid InfrastructureEV charging protocols and standardsFig. 1 shows how the system for charging battery electric vehicles with wired and wireless charging works. The smart charging system connects with the entire system and gives the vehicles the best possible charge. A few common protocols are needed to establish proper communication between the entities. Tables 1 and 2 compare and identify some common communication protocols. Table 1: Wired communication technologies in the smart grid Source: IET Renewable Power Generation FamilyStandardData RateCoveragePLCNB-PLC: ISO/IEC 14908–3 (Lon- Works) ISO/IEC 14543–3-5 (KNX), CEA-600.31 (CEBus) BB-PLC: TIA-1113 (Home Plug 1.0), IEEE 1901, ITU-T G.hn (G.9960/ G.9961)NB-PLC: 1–10 Kbps for low data rate, 10–500 Kbps for high data-rate  BB-PLC: 1–10 Mbps (up to 200 Mbps on very short distances)NB-PLC: 150 km or more    BB-PLC: 1.5 kmOptical FibreIEEE 802.3ah ITU-T G.983 (BPON) IEEE 802.3ah (EPON)100 Mbps 155,–622 Mbps 1 Gbpsup to 10 km up to 20–60 km 10–20 kmDSLITU G.992.1 (ADSL) ITU G.992.5 (ADSL2+) ITU G.993.1 (VDSL)1.3–Mbps 3.3–24 Mbps 52–85 MbpsUp to 4 km Up to 7 km Up to 1.2 km Table 2: Wireless communication technologies in the smart grid Source: IET Renewable Power Generation FamilyStandardData RateCoverageWi-FiIEEE 802.11e (QoS enhancements) IEEE 802.11n (ultra-high network throughput)BIEEE 802.11s (mesh networking) IIEEE 802.11p (WAVE: wireless access in vehicular environments) Up to 54 Mbps  Up to 600 Mbps 300 m (outdoors)  Up to 1 kmWiMaxIEEE 802.16 (fixed and mobile broadband wireless access)IEEE 802.16 m (advanced air interface)128 Mbps down and 28 Mbps up 100 Mbps for mobile users, 1 Gbps for fixed usersUp to 10 km 0–5 (optimum), 5–30 (acceptable), 30–100 (reduced) km3G / 4GI3G: UMTS (HSPA, HSPA+)   4G: LTE, LTE-AdvancedHSPA: 14.4 Mbps down and 5.75 Mbps up HSPA+: 84 Mbps down and 22 Mbps upLTE: 326 Mbps down and 86 Mbps up LTE-Advanced: 1 Gbps down and 500 Mbps up0–5 km   LTE-Advanced: 0–5 (optimum), 5–30 (acceptable), 30–100 (reduced) kmSatelliteLEO: Iridium, Global Star  MEO: New ICO  GEO: Inmarsat, BGAN, Swift, MPDS2.4 to 28 Kbps  9.6 up to 128 Kbps  384 up to 450 KbpsDepend on the number of satellites and their beams.Depend on the number of satellites and their beams.Depend on the number of satellites and their beams.Open Charge Point Protocol (OCPP) This application-based protocol implements the communication infrastructure between the charging station and the centrally distributed management system. The application protocol is freely accessible. A vendor-oriented protocol was created by the Open Charge Alliance. Due to the quick access to information that electric vehicle drivers provide, it offers more versatility.  The primary characteristics that this particular system is equipped with include transaction management, security, smart charging, message display, and the generation of warnings in the event of a malfunction. A bidirectional international communication standard is ISO 15118. It is employed as a channel of information exchange between electric vehicles and the infrastructure. Additionally, it is utilized for vehicle-to-grid mode communication.  It needs a standardized platform that can deliver and manage the protocol and its services to implement the protocol. The Driivz platform, an open charge point protocol, is one such platform. It supports the OCPI, OCHP, open intercharge protocol (OICP), and open automated DR protocol (OADR). The Driivz platform also supports ISO 15118 and OCPP 2.0, enabling vehicle-to-grid communication technologies.Open Charge Point Interface (OCPI) This system was implemented to allow charging station operators and the electric mobility service to exchange information about charging points. The following is a list of the open charge point interface's characteristics: The location status and session information are both being updated.Remote command sending.Giving charge information records to give the correct billing amount.Authorizing charging stations through the token exchange.OADRIt is intended for information exchange among the systems to study the DR. To precisely estimate demand at peak periods when it is in operation; it is standardized to send and receive accurate information between distributed energy resources and the control system of the energy management system. It predicts demand accurately at peak times during its operation.Open Smart Charging ProtocolThis protocol enables communication between an energy management system and a charge point management system for a site owner. It can share immediate predictions on the local energy grid's ability to support a charge point operation.OICPHubject was the one who developed it. It is used for standardized communication between charge point operators and e-mobility service provider systems.Global System for Mobile (GSM)It is the most widely used mobile network today. It runs in the range of 900 and 1800 MHz and is based on circuit switching. With a data rate of up to 270 kbps, the modulation method known as Gaussian Minimum Shifting Key is employed. The mobile handset, base station sub-system, networking switching substation, and operation support substation are the four major subcategories of this protocol's architecture. One of the most secure communication system protocols to date is thought to be this one.General Packet Radio ServiceThis is a packet-based data transfer protocol. Compared to the GSM, this network enables IP-based applications to operate at substantially higher data transfer rates. This specific networking protocol is mostly used for smart grid applications in remote regions.Summarizing with Key PointsEffective communication technologies are essential for successfully implementing smart grid infrastructure, particularly in the context of electric vehicle charging protocols and standards.The open charge point protocol is a widely used application-based protocol that enables communication between charging stations and centrally distributed management systems.The open charge point protocol offers versatility and quick information exchange between electric vehicle drivers and infrastructure, with features such as transaction management, security, smart charging, message display, and warning generation.In addition to the open charge point protocol, there are other common communication protocols used in smart charging systems that facilitate proper communication between entities involved in the charging process.Overall, effective communication technologies play a crucial role in ensuring efficient and reliable electric vehicle charging infrastructure within smart grid systems. This blog post is part of a full research article from the IET Renewable Power Generation. The featured image is courtesy of Midjourney.