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电网技术  2011 

换流阀阀基电子设备丢脉冲保护与控制的研究

, PP. 221-225

Keywords: 换流阀,阀基本电子设备,控制保护系统,触发系统,丢脉冲保护

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Abstract:

换流阀阀基电子设备(VBE)位于地电位,是高压晶闸管阀触发及在线监测系统的重要组成部分,主要负责将控制保护系统(CCP)的触发命令传达至门级单元(GU),同时接受门级单元的回报信息并通过以太网上传给CCP。当VBE检测到CCP发送的触发字丢失某个单阀脉冲时,VBE则会对这种现象做出相应的处理。现有的保护方法是VBE立即向CCP发送请求切换系统信号,这种方法导致了出现过高直流电压、电流的现象。本文提出了一种全新的改进方案,当VBE检测到丢脉冲后不做任何处理,而检测到连续丢4个周波(80ms)的脉冲时才向CCP发送请求切换系统信号。这种方法有效的消除了因为现有的保护方法而产生的危险现象。

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