容量比超3倍变压器的并列运行分析与试验

Analysis and Experiment on Parallel Operation of Transformer with Capacity Over 3 Times

本文分析两台变压器接线组别、变比不同时并列运行产生的循环电流,阻抗电压不同时并列运行的负荷分配。根据两变电站的20MVA与6.3MVA的35k V变压器的参数,计算阻抗电压偏差和并列运行时的负荷分配情况。通过现场实测验证了容量比超过3倍的变压器,在满足接线组别、变比相同和阻抗电压偏差条件下可并列运行。

This paper analysis of two transformer wiring group, the ratio is not the parallel operation of circulating current, impedance voltage and load distribution of parallel operation. According to the parameters of the 35kV transformer of 20MVA and 6.3MVA in two substations, the impedance voltage deviation and the load distribution in parallel operation are calculated. Through field test verified the transformer capacity of more than 3 times, in the same ratio, meet the wiring group and impedance voltage deviation under the condition of parallel operation.