线路空载充电向量检查方法研究

Research on Vector Inspection Method of Line No-load Charging

向量检查是线路送电投运前的必需工作,送电过程中需要对新投运线路、新断路器设备进行空载充电,以验证互感器极性和电流电压相序、相位的正确性。基于空载充电线路向量检查原理,提出了线路投运时电压电流的相位关系的分析方法,通过工程实际验证了该向量检查验证方法的正确性,有效降低现场送电投运时间。

Vector inspection is an indispensable work before line transmission and commissioning.During the power transmission process,no-load charging of new lines and circuit breakers is required to verify the correctness of the transformer polarity,current and voltage phase sequence and phase.This paper analyzes the principle of vector inspection of no-load charging lines,proposes an analysis method of the phase relationship between voltage and current when the line is put into operation,and demonstrates the correctness of this vector inspection verification method,which can effectively reduce the time of on-site power transmission and delivery.