Dominated Power System Research Articles

A Novel Approach to Determine and Maintain Area-Wise Minimum Inertia in Renewable Energy Dominated Power Systems

A Novel Approach to Determine and Maintain Area-Wise Minimum Inertia in Renewable Energy Dominated Power Systems

Coordinated Transmission Renewable-Storage Planning in Renewable- Dominant Power Systems Considering Energy Transmission Pathways

Coordinated Transmission Renewable-Storage Planning in Renewable- Dominant Power Systems Considering Energy Transmission Pathways

Overvoltage ride-through requirements in the Finnish converter dominated power system

Overvoltage ride-through requirements in the Finnish converter dominated power system

Overvoltage ride-through requirements in the Finnish converter dominated power system

Overvoltage ride-through requirements in the Finnish converter dominated power system

Estimation of Minimum Inertia and Fast Frequency Support for Renewable Energy Dominated Power Systems

Estimation of Minimum Inertia and Fast Frequency Support for Renewable Energy Dominated Power Systems

Voltage stability index: a review based on analytical method, formulation and comparison in renewable dominated power system

In an interconnected complex power system network voltage stability evaluation is indispensable to guarantee secure power system operation. To further increase the system performance and to make the system safer assessment, the voltage stability improvement is obligatory. In the various literature different voltage security assessment method using the voltage stability index has been presented. Different lists proposed in literature can be utilized to realize the weak buses and weak transmission lines to enacting the countermeasures against issues of voltage insecurity. Additionally, the arrangement and measuring of inexhaustible assets, on the web and disconnected observing of force framework and the measure of load to be shed at whatever point essential. This paper shows a survey on the different voltage stability index from various perspectives. The audit results on various record gives a far and wide logical to perceive the impending works in this field and to choose the best index for variety of applications such as voltage security assessment, renewable energy integration, distributed generation (DG) placement and sizing, online monitoring of the power system, and shedding of load.

A computational efficient approach for distributionally robust unit commitment with enhanced disjointed layered ambiguity set

AbstractTo achieve the sustainable development of the society, renewable energy dominated power systems are gradually formed. However, the uncertainty of renewable power poses challenges for power system operations, such as balancing the load and generation in day‐ahead unit commitment problems. To address this issue, an enhanced disjointed layered ambiguity set is proposed in this paper to effectively capture the uncertainty of renewable generation forecast errors. On this basis, a two‐stage distributionally robust unit commitment optimization problem is formulated, which is computational challenge. To this end, a novel reformation approach and a worst‐case support set identification method are proposed to derive the optimal solution in a computationally efficient way. Simulation results demonstrate that the proposed ambiguity set brings lower operation costs of unit commitment while maintaining similar reliability compared to existing methods. In detail, the proposed ambiguity set achieves a reduction in operating costs of approximately 10.01%. The proposed novel reformation approach and solution method are also shown to have higher computation efficiency than the existing Benders decomposition method, resulting in a reduction in computation time to less than 3.78% of the original duration.

Technical and economic study of renewable-energy-powered system for a newly constructed city in China

Technical and economic study of renewable-energy-powered system for a newly constructed city in China

Call for Papers: Special Section on Grid-Forming Converter Dominated Power Systems

In recent years, the landscape of power systems has witnessed a significant shift towards the massive integration of renewable energy sources, energy storage systems, and advanced power electronic devices. Among these advancements, the emergence of grid-forming converters has gained substantial attention for their pivotal role in shaping the future of power systems. Gridforming converters offer a promising solution by providing stable voltage and frequency control, improving grid stability, and enabling high-quality power transfer. In contrast to conventional power systems where the voltage is governed by synchronous generators, grid-forming converters necessitate advanced control strategies to ensure reliability and stability of the entire power system. These strategies must tackle intricate challenges like seamless grid synchronization, precise frequency and voltage regulation, robust fault ridethrough capabilities, and dynamic stability enhancement. Integrating renewable energy sources with grid-forming converters presents additional complexities, demanding optimal power management, effective grid support, and smooth transitioning amidst varying conditions. Exploring synergies between grid-forming and grid-following converters, coupled with refining communication protocols, coordination strategies, and decentralized control techniques, holds the key to efficient operation. In this context, we propose this special issue to bring together researchers and practitioners from industry, laboratories, academia, and government to present the challenges and opportunities related to grid-forming converter-dominated power system. We encourage all researchers working in this area to submit papers to this Special Issue. Topics of interest include, but are not limited to: • Grid-forming converter topologies and architectures Control strategies for grid-forming converters • Modelling and simulation techniques for power converters • Stability analysis and control of grid-forming converters in power systems • Power quality and grid code compliance of grid-forming converters • Integration of grid-forming converters with renewable energy sources • Grid-forming converters in microgrids and off-grid applications • Black start capabilities and resiliency of grid-forming converters • Communication and coordination of grid-forming converter dominated power systems • Case studies, field trials, and practical implementations of grid-forming converters • Standards, regulations, and future perspectives for grid-forming converters Check carefully the style of the journal described in the guidelines "Information for Authors" in the IEEE-IES website: http://www.ieee-ies.org/pubs/jestie. Please submit your manuscript in electronic form through: https://mc.manuscriptcentral.com/jestie-ieee/. On the submitting page, in pop-up menu of manuscript type, select: "SS on Grid-Forming Converter Dominated Power Systems", then upload all your manuscript files following the instructions given on the screen.

Design of Hybrid Power Filters for Supraharmonics Suppression in Power Electronics Dominated Power Systems

Design of Hybrid Power Filters for Supraharmonics Suppression in Power Electronics Dominated Power Systems

Subsidizing Grid-Based Electrolytic Hydrogen Will Increase Greenhouse Gas Emissions in Coal Dominated Power Systems.

Clean hydrogen has the potential to serve as an energy carrier and feedstock in decarbonizing energy systems, especially in "hard-to-abate" sectors. Although many countries have implemented policies to promote electrolytic hydrogen development, the impact of these measures on costs of production and greenhouse gas emissions remains unclear. Our study conducts an integrated analysis of provincial levelized costs and life cycle greenhouse gas emissions for all hydrogen production types in China. We find that subsidies are critical to accelerate low carbon electrolytic hydrogen development. Subsidies on renewable-based hydrogen provide cost-effective carbon dioxide equivalent (CO2e) emission reductions. However, subsidies on grid-based hydrogen increase CO2e emissions even compared with coal-based hydrogen because grid electricity in China still relies heavily on coal power and likely will beyond 2030. In fact, CO2e emissions from grid-based hydrogen may increase further if China continues to approve new coal power plants. The levelized costs of renewable energy-based electrolytic hydrogen vary among provinces. Transporting renewable-based hydrogen through pipelines from low- to high-cost production regions reduces the national average levelized cost of renewables-based hydrogen but may increase the risk of hydrogen leakage and the resulting indirect warming effects. Our findings emphasize that policy and economic support for nonfossil electrolytic hydrogen is critical to avoid an increase in CO2e emissions as hydrogen use rises during a clean energy transition.

Decentralized Composite Control for Enhanced Power and Voltage Regulation in Grid-Forming VSC Dominated Power System

Decentralized Composite Control for Enhanced Power and Voltage Regulation in Grid-Forming VSC Dominated Power System

Assessment of grid electricity systems using the life-cycle carbon-emission model

The previous study developed a life-cycle carbon emissions (LCCE) algorithm in MS Excel. Despite improvements, a comprehensive approach is needed to conduct life-cycle carbon emissions inventory (LCCEI) analysis using current methods. This study diverges from existing research by assessing LCCEI data of power generation and transmission systems on studied grids, considering component lifespans, recycling pollutants, and retirement rates. The life-cycle carbon emissions inventory analysis results improve understanding of power system environmental performance, aligning with stakeholders’ objectives. This study aims to enhance the environmental performance of electric power systems in Kenya, Rwanda, and Tanzania by evaluating the LCCE of power generation and transmission within their national grids. The selected grids are the right participants for the study, of non-renewable and renewable grid electricity generation mixes, due to their different environmental features, potential power trade, upcoming grid interconnection, and power transmission practices at various scales. The study applied a life cycle assessment method and simulated the learning patterns using RStudio. The data (emission factors and activity) has been collected from the reports (scientific and technical) and national utility actors. The presented results show that only Kenyan generation and transmission systems have a lifetime decarbonization performance relationship between renewable energy sources dominated power systems and non-renewable energy sources dominated power systems. A major challenge of this study has been the scarcity of primary data, leading to reliance on some secondary and external sources. Therefore, future research should consider the use of more internal and primary data sources, and the use of the most current data, including new technologies adopted from cradle-to-grave of the systems. This study’s findings inform better system designs, policies, and plans for improved environmental performance in electrical power systems.

Survey of Real-World Grid Incidents–Opportunities, Arising Challenges and Lessons Learned for the Future Converter Dominated Power System

To reach the climate goals set by national and international institutions, a vast transition of the legacy power system is unavoidable. The necessary integration of distributed, renewable generation devices, which are often interfaced with power electronic converters, has a non-negligible influence on the characteristics of the power grid. This is particularly visible during abnormal grid conditions such as faults. For rotating machines, the fast-timescale reaction to these events is mainly determined by physical properties. However, power electronic devices lack this strong coupling and their behavior is generated by the control and automation system, making them a major field of interest during this transition. The present paper provides a survey of real-world incidents, as for example blackouts or oscillatory incidents, that are discussed with respect to the implications for future converter dominated power grids. For typical cascading outages it is shown, where the increasing penetration of distributed, renewable generation and smart grid technologies can be leveraged to increase the system resilience, e.g. by providing grid services through adequate control design or by enabling microgrid concepts. Further, real-world examples of newly emerging challenges driven by power electronic devices are presented. The mechanisms of control system interactions with the neighboring grid and its inherent complex dependency on various factors is illustrated. Lastly, resulting structural developments such as the changed resonance properties of low voltage grids and the increase of harmonic emissions are exemplified.

Rapid Decarbonization Roadmap for India Based on Photovoltaic Systems

According to the Paris Agreement signed by national leaders, the rapid decarbonization roadmap is critical for many citizens worldwide. The burden of saving the climate at acceptable levels urges national energy planning activities accordingly. Currently, India has a fossil fuel dominated power system with a rapid increase in renewable energy installations, namely photovoltaic, in the amount of 10 GW per year. India aims to reach 500 GW of installed electricity capacity from non-fossil fuel sources by 2030. This is a very ambitious target, which would require appropriate planning studies for judicious integration and optimal management of the system. Using Energy PLAN (advanced energy system analysis computer model), the authors created various scenarios involving the integration of the above-mentioned renewable energy based capacities into India’s power system. It will provide key insights into the effects of certain policies and scenarios on the future overall energy balance, as well as the environmental (namely CO2 emissions) and social impact, thus enabling more effective policymaking in this key dimension.

Impedance-Based Stability Analysis: Nodal Admittance or Bus Admittance?

Impedance-based stability analysis is widely adopted for small-signal stability demonstration of power electronics dominated power systems. Stability assessment can be performed using either nodal admittance or bus admittance (i.e. equivalent admittance of a network viewed from a specific bus). This paper demonstrates that stability analysis using the bus admittance may not always produce correct results, even though it is easier to implement. Unstable multi-bus systems can be wrongly identified as stable by the single-bus analysis, in the cases where other buses play a dominant role in causing instabilities. A detailed comparison between nodal and bus admittance stability analysis is presented, leading to recommendations for their practical use. A phase-based method is proposed to facilitate the acquisition of eigenloci encirclement around the critical point, which can be used in the stability analysis based on either nodal or bus admittance. Following the conclusion of our work, we recommend multi-bus analysis in white-box model applications for instability mode analysis and stability-oriented design. Single-bus analysis is preferable in black-box model applications due to its simplicity. It is also suggested to select a bus for analysis from those connected to a high share of inverter-based resources, to ensure the correctness of results.

Computing the Demand Response in a Renewable Dominated Power System

Demand response refers to action where consumers can significantly optimize the electricity grid by reducing or shifting power consumption during peak periods using time-based rates or economic incentives. In this project, we have proposed a system where a smallscaled distributed generation based on renewable energy, including solar energy, with their coordination control, has been modelled to ensure generation solvency and a demand response strategy based on load shifting technique using a demand response system (DRS) for demand-side proficiency.

Preserving Existence of Equilibrium Point for Renewable Energy Source Dominated Power System

Preserving Existence of Equilibrium Point for Renewable Energy Source Dominated Power System

Analysis of the impact of transient overvoltage on grid-connected PMSG-based wind turbine systems

The annual increase in installation capacity and electrical production of renewable energy sources, primarily wind turbine generators (WTG), is shaping a renewable energy dominated power system. WTGs are susceptible to the temporary overvoltage caused by reactive power surplus following low-voltage ride through (LVRT). This can lead to the large-scale trip-off of WTGs and pose significant risks to the secure and stable operation of power systems. An insightful elaboration of the underlying mechanisms determining the occurrence of temporary overvoltage, and an analysis of influencing factors, is pivotal to ensure the reliable integration of WTGs. This paper investigates the temporary overvoltage in the AC systems integrated with multiple renewable energy stations. A temporary overvoltage model that accounts for various types of equipment has been derived. Resorting to the model, the influence of LVRT parameters of WTGs, SCR and IR of the AC system on the maximum terminal overvoltage has been quantitatively assessed. Simulations and semi-physical validations have been conducted to verify the effectiveness and accuracy of the theoretical analysis.

Review on measurement-based frequency dynamics monitoring and analyzing in renewable energy dominated power systems

Review on measurement-based frequency dynamics monitoring and analyzing in renewable energy dominated power systems