阻抗匹配平衡变压器的三继电器差动保护接线方式

Differential Protective Wiring Type of The Impedance Matching Balace Transformer in Three Relays

本文依据电力变压器的继电保护设计技术规程要求，分析了阻抗匹配平衡变压器高低压侧电流的组合规律，确定了最优化数学模型，在此基础上设计了原理正确，电路新颖、接线简单、功能齐全、工作可靠的三继电器差动保护接线方式，解决了阻抗匹配平衡变压器差动保护的关系技术，具有推广应用价值．

According to the regulations of power transformer relay protection design, The combined law of currents in the high and low voltage winds of impedance matching balance tlansformer is analysed. Base on an optimal mathematical model established in this paper, a differential protective wiring type in three re.lays is presented. The type is correct in principle. novel in circuit. sample in coallguration. and reliable in oLlcration. The proposed tncthod can resolve the diffcatpoint in differential protection of the impedance matching balance transformer, and is of applying Ualue.