四边形阻抗特征值分析与应用

Quadrilateral Impedance Eigenvalue Analysis and Application

为使继电保护定值计算精准,避免"误整定",研究利用二维坐标对四边形特性阻抗特征值的向量要素进行了深入分析。通过"阻抗向量"与四边形特性图之关联关系的分析,揭示出"模数"算法得到的定值结果,掩盖四边形特性阻抗保护装置对电网实际阻抗感测失真的隐秘机理。这种机理将导致原设电阻分量可靠系数发生变异、阻抗灵敏度校验值虚假的结果。经过数学分析及逻辑判断,推导出一种针对四边形阻抗定值有关项整定计算及校验的适用计算式,用以反映可靠系数变异程度和从灵敏度分解结果中筛出去伪灵敏度。

In order to make the relay setting the author using two-dimensional coordinates calculation precision, avoid ＂setting calculation error＂, of the quadrilateral vector elements characteristic impedance characteristic value are analyzed. Through the analysis of＂ relevance vector impedance ＂ and quadrilateral characteristic diagram of relations, reveals the ＂modular＂ algorithm to get the results, cover the quadrilateral characteristic impedance protection secret mechanism for measuring distortion of the actual grid impedance. This mechanism will cause the original resistance component reliability coefficient variation, impedance sensitivity calibration value false results.Through mathematical analysis and logical judgement, is derived for quadrilateral impedance value for a calculated item setting calculation and verification, to reflect the reliability coefficient variation and sensitivity results from decomposition of screen out false sensitivity.