100MVA级静止同步补偿器的可靠性分析

Reliability Evaluation of 100 MVA STATCOM

为分析高压大容量STATCOM的可靠性,以南方电网35kV/±200MVA链式STATCOM为研究背景,采用"金字塔"综合评估模型对STATCOM的核心部分即阀组单元和主电路结构进行了可靠性建模和预估。针对由于高压大容量STATCOM运行数据缺乏和结构单一导致的存在可靠性分析结果准确度不高的问题,在STAT-COM试验和现场数据相对缺乏的条件下,采用Bayes信息融合法对STATCOM的主电路结构的k/n(G)系统模型进行了相关的可靠性分析。该方式的预估结果与现场运行结果相符,证明其可以提高了系统可靠性预估的准确性。最后指出,对现场试验信息的和运行数据进行完整有规律地统计和整理是今后STATCOM可靠性研究的重点工作之一。

Taking the 35 kV/± 200 MVA STATCOM of China Southern Power Grid as an example,we researched the reliability of high voltage and high capacity STATCOM.The ＂pyramid＂ integrated assessment model was used to establish the reliability model of the STATCOM＇s core parts,i.e.the valve block unit and the main circuit structure,and forecast their reliabilities.Considering that the accuracy of reliability analysis is not high due to the shortage of data and structure,the Bayesian information fusion method was used to theoretically analyze the reliability of a k/n（G） system model in STATCOM＇s main circuit structure for the lack of system experimental and operational data.The estimation results are consistent with those from field operation,indicating that the accuracy of the reliability estimation is improved.It is proposed that the complete statistic and regular arrangement of field test information and operating data should be one of the major tasks for further reliability studies of STATCOM.