500 kV变压器投运向量分析及判断

Vetaor Analysis and Judgment of 500 kV Transformer Commissioning

向量检查是变压器投运时的必要工作。向量检查是由高压侧或中压侧开关投切变压器,并在低压侧投入电容器或电抗器,使变压器流过一定负荷,通过分析变压器各侧模拟量幅值和相位来判断变压器是否存在缺陷的工作。检查结果不仅可以反映各电流互感器极性的正误,也可反映交流二次回路是否存在虚接和错接等缺陷。

Vector inspection is necessary work of putting the transformer into operation. By closing the high-voltage side or medium-voltage side breaker and putting capacitor or reactor into transformer’s low-voltage side, the transformer will flow through a certain load. Defection can be found by analyzing the analog’s amplitude and phase of each side. The inspection result can reflect the correctness of the polarity of each current transformer. In addition, the result can also help founding whether there is a vir tual or wrong connection of the A.C. secondar y circuit.