Flexible HVDC technology has the advantages of high controllability,low harmonic level,wide adjustment range,etc.,and has found wide application in large-scale new energy transmission and long-distance power transmission. The worldwide frequent occurrence of high frequency oscillation accidents in flexible HVDC transmission systems contai-ning modular multilevel converter has seriously affected safe and stable operation of power system.This review first de-scribes some high-frequency oscillation accidents occurring in China,and then explains research status of high-frequency oscillation in flexible HVDC systems from two aspects,i.e.,high-frequency oscillation analysis methods and suppression strategies.Finally difficulties and future research directions of high frequency oscillation are presented.
关键词
柔性直流输电/高频振荡/稳定分析/抑制策略
Key words
flexible HVDC transmission/high frequency oscillation/stability analysis/suppression strategy
维普
万方数据