Hierarchical Time-Series Assessment and Control for Transient Stability Enhancement in Islanded Microgrids

被引:7
作者
Shen, Yang [1 ]
Peng, Yelun [1 ]
Shuai, Zhikang [1 ]
Zhou, Quan [1 ]
Zhu, Lipeng [1 ]
Shen, Z. John [2 ]
Shahidehpour, Mohammad [3 ]
机构
[1] Hunan Univ, Coll Elect & Informat Engn, Changsha 410082, Peoples R China
[2] Simon Fraser Univ, Sch Mechatron Syst Engn, Surrey, BC V3T 0A3, Canada
[3] Illinois Inst Technol, Elect & Comp Engn Dept, Chicago, IL 60616 USA
基金
中国国家自然科学基金;
关键词
Power system stability; Microgrids; Transient analysis; Stability criteria; Logic gates; Renewable energy sources; Heuristic algorithms; Islanded microgrids; grid-forming converters; gated recurrent unit neural network; renewable energy integration; transient stability assessment; emergency control; POWER; DRIVEN; SCHEME; FREQUENCY; FRAMEWORK;
D O I
10.1109/TSG.2023.3237965
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The grid-forming converters would integrate battery energy storage systems (BESSs) in islanded microgrids for smoothing out the uncertain fluctuations of renewable energy resources. However, gird-forming converters would pose transient instability risks under large disturbances, which could require fast and accurate stability assessment methods in such challenging and uncertain cases. In this work, a hierarchical time-series assessment and control (HTSAC) framework is proposed for assessing the transient stability of grid-forming converters in islanded microgrids. The proposed HTSAC framework offers a gated recurrent unit (GRU) neural network alternative for an intuitive and accurate trajectory prediction in early post-fault stages. Subsequently, an emergency ride-through control (ERC) strategy is proposed which leverages the proposed neural network approach for enhancing the prediction results in real-time assessments of microgrid transient stability. The initial input horizon of GRU is optimized to avoid intense trial-and-error design burdens incurred in conventional data-driven assessment methods. Simulation and experimental results are presented to validate the effectiveness of the proposed HTSAC on an islanded microgrid in south China. The results also point out that the GRU of the prediction layer with a quantile loss function would ensure a timely ERC in the proposed HTSAC approach to renewable energy-based converter operations.
引用
收藏
页码:3362 / 3374
页数:13
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