肖　靓，王　磊，陈　雷，宁　卜

(1.佛山电力设计院有限公司，广东佛山528200；2.西北电力设计院有限公司 系统规划部，陕西西安710075；3.中国能源建设集团 广东省电力设计研究院，广东广州510530；4.国网冀北电力有限公司，北京100053)

基于BP神经网络的STATCOM主回路故障诊断

肖靓1，王磊2，陈雷3，宁卜4

(1.佛山电力设计院有限公司，广东佛山528200；2.西北电力设计院有限公司 系统规划部，陕西西安710075；3.中国能源建设集团 广东省电力设计研究院，广东广州510530；4.国网冀北电力有限公司，北京100053)

摘要：STATCOM主回路主要由电力电子器件构成。电力电子器件过载能力小，损坏速度快，故障发生前征兆较难捕捉。设计合理有效的STATCOM主回路故障诊断方法可在故障发生后及时对故障管进行定位，尽快排除故障，使装置恢复正常运行。人工神经网络技术具有很强的非线性映射特征和自学习能力，非常适用于STATCOM主回路电力电子器件的故障诊断。以三相三桥臂STATCOM为研究对象，建立其主回路IGBT或续流二极管单管开路故障模式并提取故障特征，根据神经网络非线性映射特性，建立BP神经网络来学习及存储故障特征信号和故障类型的映射关系。MATLAB仿真表明,该神经网络能够准确地诊断和定位STATCOM主回路开关元件单管开路故障，具有很好的故障识别能力。

关键词：STATCOM；开路故障；BP神经网络

中图分类号：TM743

文献标识码:A

DOI:10.3969/j.issn.1672-0792.2015.03.009

收稿日期：2015-01-15。

作者简介：肖靓(1984-)，女，工程师，主要研究方向为电力系统规划及运行，E-mail：7070711@qq.com。

Abstract：The main circuit of STATCOM is composed of power electronic devices. Due to the fact that the switches have a low overload capacity and can be damaged in an instant and the sign of a coming failure is difficult to catch, it’s necessary to devise a reasonable and effective fault diagnosis method for the STATCOM main circuit, which can locate and debug the faulty switches in time, and clear the failure as soon as possible, and then the device can be back to normal running. With the strong nonlinear mapping characteristics and self-taught ability, application of artificial neural network technique has been widely used in STATCOM of the fault diagnosis of the main circuit of the power electronic device. Set the three-phase bridge arm STATCOM as its research object, the main loop of the IGBT or the freewheeling diode single open circuit fault modes was established and the fault feature was extracted. Based on the nonlinear neural network mapping characteristics, BP neural network method of fault diagnosis was used, and the structure and parameters were designed to train the network. MATLAB simulation showed that The artificial neural network can accurately diagnose and localize the STATCOM main circuit switching element single open circuit faults and has a good ability in fault identifying.

Keywords：STATCOM; open-fault; BP neural network

0引言

静止同步补偿器(STATCOM)由于其控制灵活，调节范围广及能对系统进行动态补偿等优点，成为无功补偿装置的发展方向。……