换流变压器套管TA极性校验方法改进

Improvement of Polarity Checking Method for Converter Transformer Bushing TA

换流变压器套管TA极性的正确与否直接关系到电流差动保护动作的可靠性,对换流变压器的安全稳定运行具有重要影响。针对常规TA极性校验方法难以用于换流变压器套管TA极性校验的问题,提出了一种改进的单相双绕组换流变压器套管TA极性校验方法,并将该方法应用到工程实践,应用结果表明,该方法正确有效。

The correctness of TA polarity of converter transformer bushing is directly related to the reliability of current differential protection,which has an important influence on the safe and stable operation of converter transformer.For conventional TA polarity checking method is difficult to be used for TA polarity verification of converter transformer bushing,an improved TA polarity checking method of single-phase double-winding converter transformer bushing is proposed and applied to engineering practice.Engineering practice shows that the method is correct and effective.