一种特殊接线方式下的站变备自投装置故障原因分析

Fault Analysis and Solution of Reserve Power Source Automatic Connection Device for Substation Transformer under Special Connection Mode

变电站站用变压器备用电源自动投入装置(简称站变备自投装置)给全站的交直流用电提供安全保障,对电力系统安全可靠运行具有非常重要的意义。文章以粤北某500 kV变电站许继CSL210B型站变备自投装置在特殊接线方式下运行中出现的误动作为例,进行了分析与探索,找出了误动作的根源,并针对许继CSL210B型站变备自投装置在该变电站特殊接线方式下运行的特点,充分考虑到与现有的设计相兼容,对现有备自投装置硬件的设计进行了重新设计,消除了误动作根源,保证了该500 kV变电站交直流站用电的安全稳定运行。

The reserve power source automatic connection device for substation transformer provides the safety gnarantce for AC and DC power supply of substation, which has very important meaning for reliable operation of power system. Taken the mal - operation of CSL210B reserve power source automatic connection device made by Xuchang Relay Protection Co. under the special connection mode m 500 KV substation in Yuebei as an example, the source of mal - operation was analyzed and discussed. According to the characteristics of CSL210B reserve power source automatic connection device made by Xuchang Relay Protection Co. under the special connection mode, and fully considering the compatibility with existing design, the hardware of reserve power source automatic connection device was redesigned, and the source of mal - operation was eliminated, which guaranteed the safety and steady operation for AC and DC power supply of this 500 KV substation.