负序电流保护的整定计算和配置方案探讨  

Discussion on Setting Calculation and Configuration Scheme of Negative Sequence Current Protection

作　　者：曹红日 米建宾[2] 于壮壮 杨鑫 杨佳新 

机构地区：[1]北京京能高安屯燃气热电有限责任公司,北京100024 [2]国网冀北电力有限公司电力科学研究院(华北电力科学研究院有限责任公司),北京100045 [3]国家电网公司华北电力调控分中心,北京100053

出　　处：《华北电力技术》2017年第5期20-26,共7页North China Electric Power

摘　　要：对负序电流定值整定不合理造成系统故障时保护动作切机的事件进行了分析。充分考虑与线路保护的配合关系,依据从故障点向电源方向,实现保护灵敏度逐级降低,动作时间逐级增长的原则,通过清晰的逻辑推理、计算分析,给出了详细、合理的整定计算方案。提出了CSC-300G保护装置负序过负荷反时限下限段延时和负序过流定时限跳闸延时的参数设置优化方案。Analysis on an accident of generator shutdown that caused by unreasonable negative sequence current set- ting when the system was failure was given. Fully considering the coordination relationship with the line protection, a detailed and reasonable program of setting calculation, according to relay protection sensitivity gradually dropping and action time gradually increasing, from the fault point to the power supply, with clear logical reasoning, calculation and analysis was proposed. A parameter setting optimization method was proposed for the lower bound of negative se- quence overload inverse time and negative sequence overcurrent delay trip in CSC-300 protection device.

关 键 词：负序过流保护 负序过负荷保护 故障录波 整定计算 配置优化 

分 类 号：TM774[电气工程—电力系统及自动化]