计及主变保护的备自投装置改进方案

The improved scheme of the automatic bus transfer device considering the main transformer protection

内桥接线的变电站一般配备完善的备自投装置,以弥补由于接线方式而造成供电可靠性下降的不足,但是却忽略了主变保护的动作行为与备自投装置之间的配合,使其成为了盲区。分析了主变保护对备自投装置的影响,改进了备自投装置的逻辑回路,提高了备自投装置对主变保护的识别能力,提高了供电可靠性。

Generally the substation with the connection mode of the inner bridge has the perfect automatic bus transfer device to make up the degradation of the power distribution reliability. But, the device ignores the co-operation between the main transformer protection and the automatic bus transfer device, which becomes a blind area. This paper analyzes the influence of the main transformer protection to the automatic bus transfer device, improves the logical circuit of the automatic bus transfer device, increases the discernment of the automatic bus transfer device to the main transformer protection, and also increases the power distribution reliability.