分散式电流方向母线保护的实现

针对35kV及以下变电站缺少快速有效的母线保护的现状,提出了一种利用厂站自动化系统构成的基于电流方向原理的分散式母线保护方案,该方案利用厂站自动化系统的间隔层实时通信网络及馈线保护的动作接点构成分散式母线保护。介绍了其实现原理、各单元的功能配置、可实现的功能及可靠性方面的考虑。该方案原理简单、动作速度快、扩展方便,适用于出线较多的电厂厂用电系统及35kV及以下变电站,该方案已在PDS-7000厂站自动化系统中实用化。

Implementation of distributed directional current bus protection

Aiming to improve the status quo of being lack of fast and effective bus protection in 35 kV and below substations,a scheme of bus protection based on distributed directional current principle is introduced,which uses the real-time communication network of bay level of power plant and substation automation system and the action contacts of feeder protection.The implementation principle,function configurations of different units and the consideration of possible functions and reliability are presented.With superiorities in principle,speed and expansibility,it is suitable for auxiliary power plant with more outlet lines and 35 kV and below substations.It has been applied in PDS-7000 power plant and substation automation system.