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Dr. Yuchen Zhang

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Guest Editor

School of Electrical Engineering and Telecommunications, University of New South Wales, Kensington, NSW 2033, Australia
Interests: power system stability; renewable energy integration; wind farm condition monitoring; wind farm planning; smart campus; energy storage modeling and control; machine learning; data analytics; data-driven applications in power engineering
Special Issues, Collections and Topics in MDPI journals

Prof. Dr. Zhao-Yang Dong

E-Mail Website
Guest Editor

School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney 2052, Australia
Interests: power system planning and stability; smart grid/micro-grid; load modeling; renewable energy grid connection; electricity market; smart city; computational methods applications in power engineering problems
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Renewable energy sources, such as wind farms and solar systems, are increasingly integrated onto electricity grids via grid-connected power electronic devices. The asynchronous nature and low inertia of power electronics tend to weaken the energy systems, which brings new system stability issues and, in the worst-case scenarios, could lead to cascading failure and blackout events in response to disturbances. This Special Issue focuses on the technical challenges in system strength and stability and encourages innovative and breakthrough technologies to strengthen renewable energy systems. Topics of interest include but are not limited to:

Technical challenges in weak grids with high power electronic penetration
System strength modelling and assessment
Non-network system strength enhancement
Power system stability analysis and control
Power electronics operation and control
Integration of renewable energy into electricity grids
Control and coordination of renewable energy sources
Energy storage optimization and control
Review of technologies for system strength analysis and enhancement

Dr. Yuchen Zhang
Prof. Dr. Zhao-Yang Dong
Guest Editors

Manuscript Submission Information

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Keywords

Power system strength
Power system security
Power system stability
Power system planning
Power system control
Power electronics
Renewable energy grid integration
Electrical power conversion
Weak grid

Published Papers (2 papers)

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Research

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14 pages, 27469 KiB

Open AccessArticle

Performance Evaluation of Solar PV Inverter Controls for Overvoltage Mitigation in MV Distribution Networks

by Dilini Almeida, Jagadeesh Pasupuleti, Shangari K. Raveendran and M. Reyasudin Basir Khan

Electronics 2021, 10(12), 1456; https://doi.org/10.3390/electronics10121456 - 18 Jun 2021

Cited by 10 | Viewed by 1766

Abstract

The incorporation of real and reactive power control of solar photovoltaic (PV) inverters has received significant interest as an onsite countermeasure to the voltage rise problem. This paper presents a comprehensive analysis of the involvement of active power curtailment and reactive power absorption techniques of solar PV inverters for voltage regulation in medium voltage (MV) distribution networks. A case study has been conducted for a generic MV distribution network in Malaysia, demonstrating the effectiveness of fixed power factor control, Volt–Var, and Volt–Watt controls in mitigating overvoltage issues that have arisen due to the extensive integration of solar PV systems. The results revealed that the incorporation of real and reactive power controls of solar PV inverters aids in successfully mitigating overvoltage issues and support network operating conditions. Furthermore, the comparative analysis demonstrated the importance of employing the most appropriate control technique for improved network performance. Full article

(This article belongs to the Special Issue Strength and Stability of Renewable Energy Systems: Challenges and Solutions)

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Review

Jump to: Research

14 pages, 957 KiB

Open AccessReview

An Overview of System Strength Challenges in Australia’s National Electricity Market Grid

by Li Yu, Ke Meng, Wang Zhang and Yuchen Zhang

Electronics 2022, 11(2), 224; https://doi.org/10.3390/electronics11020224 - 11 Jan 2022

Cited by 8 | Viewed by 2759

Abstract

The national electricity market (NEM) of Australia is reforming via the rapid uptake of variable renewable energy (VRE) integration concurrent with the retirement of conventional synchronous generation. System strength has emerged as a prominent challenge and constraint to power system stability and ongoing grid connection of VRE such as solar and wind. In order to facilitate decarbonization pathways, Australia is the first country to evolve system strength and inertia frameworks and assessment methods to accommodate energy transition barriers, and other parts of the world are now beginning to follow the same approach. With the evolvement of the system strength framework as a new trending strategy to break the transition barriers raised by renewable energy project development and grid connection studies, this paper provides a high-level overview of system strength, covering such fundamental principles as its definition, attributes, and manifestations, as well as industry commentary, cutting-edge technologies and works currently underway for the delivery of a secure and reliable electricity system with the rapid integration of inverter-based resources (IBRs) in the NEM grid. The intent of this study is to provide a comprehensive reference on the engineering practices of the system strength challenge along with complementary technical, regulatory, and industry perspectives. Full article

(This article belongs to the Special Issue Strength and Stability of Renewable Energy Systems: Challenges and Solutions)

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