特高压换流站直流隔离开关烧蚀分析及改进

Erosion Analysis and Improvement of DC Isolating Switch in UHVDC Converter Station

摘要:

:首先介绍了特高压某换流站金属回线转换隔离开关触头烧蚀情况，具体分析了造成触头烧蚀的主要原因，并 指出了隔离开关存在合位信号不准确的严重安全生产隐患，阐明了此类隐患可能对一次设备以及直流控制保护系统 的影响。同时提出了相应的解决方案，并用于现场实施，改造效果良好，可为国内其他换流站提供了借鉴。

Abstract:

Firstly the erosion situation of a DC converter contact in UHVDC converter station is introduced，the main causes of contact erosion are analyzed in detail，and it is pointed out that there exists serious hidden dangers to the isolating switches because of inaccurate closing signal，which indicates that such hidden dangers may influence primary equipment and DC control protection system． And then the corresponding solutions are put forward，which have been used for field implementation and have a good transformation effect． So it can provide a reference for other converter stations in China．