云广工程阀组旁路开关控制策略研究

Control strategy for valve group bypass switch in Yun-Guang project

详细总结了云广特高压直流系统的各种不同运行方式对阀组旁路开关状态的要求。着重分析了第二个阀组解锁、第一个阀组闭锁和第一个阀组紧急停运(ESOF)时阀组旁路开关的控制策略;阐明了换流阀触发脉冲与阀组旁路开关间的配合方式,并采用RTDS实时数字仿真系统对上述三种阀组解闭锁情况下阀组旁路开关的控制过程进行了仿真分析。立足于现场运行维护角度提出了阀组旁路开关的操作逻辑中应增加大电流闭锁手动操作逻辑,以保证设备安全。

The requirement on the valve group bypass switch（BPS） is summarized for all different operation modes of Yun-Guang UHVDC power transmission system.The control strategy of valve group bypass switch is analyzed in detail for deblocking the second vavle group,manually blocking the first vavle group and the first vavle group ESOF.After that,the cooperation way between valve group firing angle and bypass switch is expounded,even more,the control processing of bypass switch for valve group deblock,block and ESOF above mentioned is analyzed in detail by using real-time digital simulation（RTDS） system.At last,from the viewpoint of operation and maintance work,manually switching off valve group bypass switch should be inhibited by big current to ensure equipment more safety.