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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。
In order to analyze the reliability of high voltage and high capacity STATCOM, taking the 35kV / ± 200MVA chain STATCOM of China Southern Power Grid as the research background, the reliability of the valve unit and the main circuit structure, which is the core of STATCOM, was evaluated by the “pyramid” comprehensive evaluation model Modeling and forecasting. Due to the lack of accuracy and high accuracy of reliability analysis results due to the lack of data and structure of high-voltage and high-capacity STATCOM, under the conditions of relatively lack of STAT-COM test and field data, the main circuit of STATCOM The structural reliability of the k / n (G) system model is analyzed. The result of this method is consistent with the result of on-site operation, which proves that it can improve the accuracy of the system reliability prediction. Finally, it is pointed out that the complete and regular statistics and arrangement of the field test information and operation data are one of the key tasks in the future reliability study of STATCOM.