关于工频变化量阻抗继电器的校验方法探讨

Discussion on check method of power frequency variation impedance relay

目前工频变化量阻抗继电器广泛应用于中、高压线路保护,工频变化量阻抗保护在许多厂家的保护装置都有使用,但在实际校验工作中,其阻抗动作特性和整定值动作边界校验离散性很大;通过分析工频变化量阻抗继电器的动作方程推导出工频变化量阻抗继电器的校验公式,通过多年来实际现场校验的经验和方法,对目前文献介绍的两种工频变化量阻抗继电器的现场校验方法进行了对比分析,提出了现场建议使用的校验方法。

Currently frequency variation impedance relays are widely used in middle and high voltage line protection.Many manufacturers use frequency variation impedance protection at their protection devices, but in actual check work, there is large discrete in impedance action characteristics and the action border check of setting value. By analyzing the power frequency variation of impedance relay action equation, this paper deduces the check formula for the frequency variation impedance relay. Through years of actual field experience and methods of check, the published paper introduces about two field check methods of frequency variation impedance relay to conduct a comparative analysis and points out field recommended check methods.