摘要
浙江电网500 kV瓶窑变和兰亭变的220 kV母线因电网中的短路电流超负荷已被迫分裂运行,一定程度影响了电网运行的安全可靠性。对500 kV自耦变中性点装设小电抗的必要性和可行性进行研究分析,提出了兰亭变中性点小电抗的技术要求,为控制220 kV系统短路电流提供了一种切实有效的方法。作为华东电网第1台装设在500 kV主变中性点的小电抗,自2004年6月投运以来运行良好。
Since the short-circuit current is too large, the 220 kV busbars of ：500 kV Pingyao and Lanting substations of Zhejiang Power Grid were forced into a split operation, which affected the safe and reliable operation of the grid. The necessity and feasibility of installing small reactors on neutral points of 500 kV autotransformers are studied, and technical requirements for installing the small reactor on Lanting Substation＇s neutral point are proposed, providing an applicable method for controlling the short-circuit current of 220 kV systems. The reactor installed on tanting Substation＇s neutral point, the first reactor of this kind in East Chin Power Grid, works well since it went into operation in June of 2004.
出处
《华东电力》
北大核心
2006年第11期59-61,共3页
East China Electric Power
关键词
短路电流
分层分区
自耦变压器
中性点小电抗
工频过电压
short-circuit current
leveling and zoning
autotransformer
small reactor on neutral point
power frequency overvoltage
