摘要
结合某500 kV变电站直流系统保护配置设计,计算直流系统各级短路电流,给出了直流系统各级保护配置额定值的选取原则。根据短路电流计算结果及直流断路器的配置情况,研究了500 kV变电站直流系统保护的级差配合特性。最后,总结了当前某变电站直流系统断路器保护配置存在的问题,给出了合理化改造建议。
Combined with configuration design of typical 500 kV substation DC system protection in Hebei south grid,the short-circuit current at different stages of DC system were calculated,and the select principle of configuration ratings were given.According to calculation result of short-circuit current and configuration of DC breaker,the stage difference coordination charac-teristic were studied for 500 kV Substation DC system protection.At last,the problems of substation DC system breaker protec-tion configuration in a substation were summarized,and the rationalization transformation proposals were given.
出处
《低压电器》
北大核心
2011年第6期51-54,共4页
Low Voltage Apparatus
关键词
变电站
直流系统保护
级差配合
特性
substation
DC system protection
stage difference coordination
characteristic
作者简介
李秉宇（1981-），男，助理工程师，研究方向为电力系统自动化。
郝晓光（1980-），男，工程师，研究方向为继电保护、智能电网技术。
