微机式变压器保护的若干问题

Some problems of microprocessor-based transformer protection

针对微机式变压器差动保护的构成原理及实际运行情况,着重讨论了微机式变压器差动保护的接线、各侧平衡系数、外部短路时差动不平衡电流的新情况及其补偿方法,关于CT断线的处理方法,励磁涌流的识别方案等关键问题,并提出了今后需要重点研究的问题,以便进一步提高变压器差动保护的运行技术水平和自身的各项技术性能。

Based on the principle and practical operation of microprocessor-based transformer protection, a number of problems are discussed in this paper, including the connection of microprocessor-based transformer differential protection, the coefficient of current balance, the new situation of unbalanced current and its compensation method, the detection of exiting inrush.