直流接地极电流对中性点直接接地变压器影响

The Influence of Current of DC Earthing Electrode on Directly Grounded Transformer

采用变压器铁心励磁特性曲线 ,利用 EMTP程序计算出直流偏磁时变压器的励磁电流 ,当变压器的励磁电流不超过规定值时 ,认为该直流偏磁对应的直流电流可接受。根据这一原则 。

Using the exciting curve of core of transformer and EMTP program the exciting current of transformer is calculated. When the exciting current of transformer does not exceed the defined value the dc current corresponding to the dc offset magnet can be accepted. According to this principle the transformer of Three Gorge DC Project is calculated. Abstract DC earthing electrode transformer offset magnet influence