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

ZHENG Qing-shui; MA Zhi-ying

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

更新时间：2025-04-26

- Recursive Least Square Correction Algorithm for Short-circuit Current Real-time Calculation
- High VoltageApparatus Issue 4, Pages: 241-244(2004)
- 作者机构：
  
  1. 西安交通大学电气工程学院
  2. 西安交通大学电气工程学院陕西西安710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM744
- Published：2004
- 稿件说明：
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[1]郑清水,马志瀛.短路电流实时计算的递推最小二乘校正算法[J].高压电器,2004(04):241-244.

ZHENG Qing-shui, MA Zhi-ying. Recursive Least Square Correction Algorithm for Short-circuit Current Real-time Calculation[J]. High voltageapparatus, 2004, (4): 241-244.
[1]郑清水,马志瀛.短路电流实时计算的递推最小二乘校正算法[J].高压电器,2004(04):241-244. DOI：

ZHENG Qing-shui, MA Zhi-ying. Recursive Least Square Correction Algorithm for Short-circuit Current Real-time Calculation[J]. High voltageapparatus, 2004, (4): 241-244. DOI：

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。

Abstract

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.

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