变压器套管CT试验方法

Research on Test Methods of the Sleeve-type Current Transformer

变压器套管CT试验,利用常规试验方法——电压法由于变压器绕组电感的影响无法顺利完成。从电流互感器和变压器工作原理入手,通过对套管CT和变压器电磁感应理论分析,找出了一种简单、有效的方法,即对某一侧一相试验时,短路其他侧对应相,从而抵消变压器绕组电感的影响。该方法经现场多次实践证明,是可行、准确、可靠的。

Through the theoretical analysis on the bushing CT and the electromagnetic induction of transformer,a simple and effec-tive mean were found from the operating principle of the current transformer and transformer, which was making other sides＆#39; corre-sponding phase short-circuited,thus canceling out the influence of the transformer winding inductance when one side＆#39;s one-phase test was operated. This method has been proved by the field practice for many times to be practicable,accurate and reliable.