直流换流站换流失败引起继电保护不正确动作的分析及防范措施探讨  

Discussion on Incorrect Action of Protection Caused by Commutation Failure in DC Converter Station and Its Countermeasures

作　　者：鲁德锋 毛为民 冼伟雄 

机构地区：[1]广州供电分公司,广东省广州市510180

出　　处：《电力设备》2006年第1期54-56,共3页Electrical Equipment

摘　　要：对因直流换流站换流失败引起220kV线路两侧突变量方向保护不正确动作的原因进行了分析。在故障分析过程中利用标准COMTRADE格式的故障录波数据对保护装置进行了故障再现及回放试验。通过分析和试验,引出了超高压交直流电网并联运行时,如何防范直流换流站换流失败引起高压交流电网中继电保护不正确动作的新课题,并进行了探讨,提出了有效的防范措施。文章认为:直流换流站换流失败对交流电网中高频突变量方向保护的影响较大,容易引起误动,面对纵联距离保护和纵差保护的影响较小,引起误动的可能性也较小。The reason for incorrect action of sudden- change direction protection of 220 kV two skies caused by commutation failure in DC converter station was analyzed. The test for protective device to reappear and replay the fault was carried out in fault analysis course and adopting the fault recording data of standard COMTRADE form. Through the test and analysis, the new topic of preventing incorrect action of protection in HVAC power network caused by commutation failure in DC converter station was discussed, and the effective countermeasures were put forward. It is pointed out that the influence of commutation failure in DC converter station is greater on sudden - change direction protection of high frequency in HVAC power network, which can arouse mistake action easily, and the influence for pilot distance protection and longitudinal differential protection is less, the possibility of mistake action is also less.

关 键 词：交直流并联电网 继电保护 换流失败 突变量方向元件 换流站 变电站 

分 类 号：TM588[电气工程—电器]