±800kV云广直流工程逆变侧单极保护动作导致双极闭锁原因分析

摘要

±800 kV云广特高压直流输电工程已于2010年6月双极投入运行,在进行系统调试阶段,在站间通讯中断情况下,曾出现逆变侧单极保护动作导致双极闭锁的现象.本文根据现场的故障记录数据,对云广特高压直流双极闭锁的原因进行了详细分析.并针对分析出的结果,提出了修改直流控制系统内部参数等切实可行的改进措施,对特高压直流系统的现场稳定运行具有一定的现实意义.%Yunnan - Guangdong ±800 kV UHVDC Project was put into operation since June, 2010. In the commissioning period ,it happened that the Bipole was blocked by single pole protection actived without interstation communication in the inverter station. In this paper, the reasons for the Bipole blocked are analyzed in detail, according to the recorded fault data . In addition, the practicable improving measures,such as modifying the internal parameters of DC control system, etc., were given in view of the analyzed results,which has certain practical significance to the steady operation of the UHVDC system.