提高微机型逆功率继电器可靠性

On the Improvement of Reliability of Microcomputer-based Reverse-power Relay

逆功率继电器的可靠性直接关系到大中型发电机变压器组的安全运行。分析了逆功率继电器的特点及精度要求、测量回路的误差来源以及不正确动作的原因,提出了有效提高逆功率继电器可靠性的措施。依此设计的逆功率继电器已顺利通过大型发电机组的真机试验并成功运行。

Reliability of reverse-power relay is of immediate effect on the secure operation of large and medium generatortransformer units. The reverse-power relay is analyzed in various aspects, such as its features, accuracy requirement, error origins of measurement circuit and the causes of mal-operation. Some efficient measures are also brought forward to improve the reliability of reverse-power relay. Field experiment and successful application in large generator with the proposed measures are introduced in the paper.