一种改进的保护协调配合方法及其仿真研究

An Improved Protection Coordination Method and Its Simulation Research

提出了一种用于继电保护协调配合计算的时间灵敏度优化配合方法,该方法以时间级差约束违背数、故障持续时间、灵敏度约束违背数和配合对动作时间差与时间级差之差的加权和作为保护系统协调配合的优化目标,并采用速度跟踪粒子群算法对其进行优化计算。以一个配电网反时限过流保护配合为算例进行了计算和分析,其结果表明TSOC方法可根据系统特点和整定需要方便、量化地对继电保护性能选择进行适当折衷,具有很好的实用性和有效性。

A time sensitivity optimal coordination（TSOC） method for relay protection coordination calculation is presented.It utilizes the weighted sum of time difference constraint violations,fault durative time,sensitivity constraint violations and operation time diffecrence for protection pairs as optimal goals,and uses velocity tracking particle swarm optimization（VTPSO） for optimization calculation.Based on this method,an example of protection coordination of inverse definite minimum time lag overcurrent rleays is calculated and analyzed,whose results prove that the TSOC method can compromise protection operation perfomance conveniently and quantitatively with system characteristics and requirements,and the value of its objective function also can act as the evaluating indicator of protection settings.