级联型STATCOM起动及待机状态下直流电压均衡分析

Analysis of DC voltage balancing of cascaded STATCOM on startup or standby state

直流电压均衡问题是影响级联型STATCOM装置正常运行的重要因素之一。目前,针对正常运行时的直流电压的讨论和研究很多,但是没有针对装置起动或待机状态下的讨论。基于级联型STATCOM等效模型,重点讨论了起动和待机状态下,级联型STATCOM直流电压的分布规律。通过分析表明,待机状态下直流电压的均衡问题同样存在,并针对性地提出了解决措施。起动和待机状态下,直流电压均衡问题的解决是提升STATCOM装置运行水平的重要一环。结论对装置设计与故障检测具有一定意义。

DC voltage balancing is one of the important factors affecting the normal operation of cascade STATCOM device.At present,there are many discussions and researches about the DC voltage in normal operation,but few in the device start up or standby.The distribution of cascaded STATCOM DC voltage is discussed,based on cascaded STATCOM equivalent model,on the start up and standby modes.The analysis shows that the balancing problem of DC voltage also exists in the standby state,and puts forward the solving measures.Solve of the DC voltage balancing problem on start up and standby mode,is an important part of the STATCOM operation of the device.The conclusion has certain signifcance to the device design and fault detection.