短路电流实时计算的递推最小二乘校正算法  

Recursive Least Square Correction Algorithm for Short-circuit Current Real-time Calculation

作　　者：郑清水[1] 马志瀛[1] 

机构地区：[1]西安交通大学电气工程学院,陕西西安710049

出　　处：《高压电器》2004年第4期241-244,共4页High Voltage Apparatus

摘　　要：为了缩短实时、准确获取短路电流参数所需要的时间,提出了递推最小二乘校正新算法。该算法利用三个不同的采样起点通过校正的方法来消除衰减分量对计算结果的影响,同时利用递推原理减少计算量,从而实现对短路电流的实时计算。通过仿真校验表明,对于50Hz的电网,当每周波采样64次,信噪比为30dB时,递推最小二乘校正算法最长能够在短路发生后8ms实时、快速、准确地计算出短路电流的基波参数。To reduce the time consumption for obtaining pa-rameters of short-circuit current in real-time and accurately,a new algorithm called Recursive Least Square Correction Algorithm(RLSCA)is proposed in this paper.This algo-rithm uses the principle of correcting three different sam-pling start points to eliminate the effect of attenuation com-ponent on calculation result,and uses the recursive princi-ple to optimize the calculation process.It is proved that RLSCA can be applied in the real-time calculation of short-circuit current.The simulative result shows under the condition that the frequency of the power system is50Hz,the sampling mode is64samples per cycle and the SNR is30dB,this method can complete the calculation of the rel-ative parameters of the fundamental wave of the short-circuit current within8ms after the short circuit fault occurs.

关 键 词：短路电流 实时计算 最小二乘算法 断路器的智能操作 

分 类 号：TM744[电气工程—电力系统及自动化]