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Mechanism and Methods for Fault Recovery of Grid-Forming Inverter by Graphical Illustration

作     者:Yang, Jialun Ye, Hua Wang, Yantuan Liu, Yutian Li, Yujun Du, Zhengchun 

作者机构:Shandong Research Institute of Industrial Technology Jinan250061 China Shandong University Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Jinan250061 China Xi'an Jiaotong University Department of Electrical Engineering Xi'an710049 China 

出 版 物:《IEEE Transactions on Power Systems》 (IEEE Trans Power Syst)

年 卷 期:2025年第40卷第2期

页      面:1973-1976页

核心收录:

学科分类:0808[工学-电气工程] 080802[工学-电力系统及其自动化] 08[工学] 

基  金:This work was supported in part by the Science and Technology Project of the State Grid Corporation of China under Grant 5100-202399364A-2-2-ZB and Grant 520600230020  in part by the Natural Science Foundation of China under Grant 52077126  and in part by the Taishan Scholars Program 

主  题:Fault current limiters 

摘      要:The existing priority-based current limiting control (CLC) for grid-forming (GFM) inverters may lead to failures in fault recovery, including being locked in CLC and mode oscillation between CLC and constant voltage control (CVC). To resolve these problems, this letter first reveals the fault recovery mechanism of droop controlled GFM inverters by illustrating the conditions of three fault recovery states in the phasor diagram. Then, two methods including determination of the optimal range of current angle and upper limit of saturation block are presented to guarantee successful fault recovery of GFM inverters. The correctness of theoretical analyses is verified and validated by multiple experimental tests. © 1969-2012 IEEE.

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