浅议变电站PT二次回路中性点安装过电压保护的重要性

Discussion on the importance of the protection of the PT two circuit neutral point of the transformer substation

近年来,变电站设备因遭受雷击或输电线路雷电侵入波而导致绝缘损坏的事故时有发生,由于雷电冲击传递过电压将对二次绕组绝缘耐受电压造成很大的威胁,因此,在电压互感器二次回路中性点就地安装过电压保护措施具有重要的意义。本文对电压互感器二次中性点安装过电压保护的必要性进行分析研究。

In recent years,substation equipment from lightning or transmission line lightning invasion wave and cause damage to insulation accidents occur from time to time,due to lightning impulse transmission voltage will on the secondary winding insulation withstand voltage pose a great threat.Therefore,in the voltage transformer secondary circuit neutral point is locally installed voltage protection measures has important significance.In this paper,the necessity of voltage transformer two neutral point to install over voltage protection is analyzed.