华新换流站直流接地极对中性点接地变压器的影响

对中性点接地变压器的影响因素包括多个, 其中最主要的是地电位升。通过直流接地极对中性点接地变压器影响的各个参数和其变化范围以及各参数相互关系的分析, 得出结论: 由于各影响因素本身的不确定性, 导致目前各种影响评估计算方法都存在偏差, 因而不能作为是否采取保护措施的依据, 应根据运行后实际情况考虑是否采取保护措施。

Effects of Huaxin Converter Station DC Grounding Pole on Neutral Grounded Transformers

There are several factors affecting neutral grounded transformers,among then,ground potential rise is most important.Through analyzing parameters of DC grounding pole affecting neutral grounded transformers and their ranges,as well as their mutual relations,it is concluded that the uncertainties of all the factors themselves result in errors in all the evaluation methods.Therefore,whether protective measures should be taken depends on real situations after operation instead of those methods.