本文分析了飛輪儲能系統易發生的四種電氣故障，提出了改進的各相電流獨立控制的容錯拓撲。對比傳統的電機中性點與逆變器直流端中點相連的容錯拓撲，改進的拓撲在發生驅動電機繞組開路故障或逆變器器件單管發生開路、短路故障的情況下，系統仍能持續穩定地運行。本文對提出的容錯拓撲及控制策略做了詳細分析并給出仿真結果。
Abstract：The paper analyzes four common electrical faults in flywheel energy storage system (FESS). On the basis of analyzing the advantages and disadvantages of a traditional fault-tolerant topology with leading-out mode of neutral point access to the center point of the DC bus, an improved fault-tolerant topology and operation strategy with phase currents separately controlled are presented. Whenever one phase open-circuit winding fault, open transistor fault or shorted transistor fault occurs, FESS still works stably. The improved topology and control schemes are analyzed in detail, and proved by simulation results.
關鍵字：飛輪儲能系統；容錯；電流控制
Keywords：Flywheel energy storage system; fault-tolerant; current regulation