Flicker Detection and Source Location Method Based on S-transform

LYU Ganyun; WU Yang; SHI Xiang; JIANG Xiaowei; WU Qiyu; WU Chenyuan

doi:10.14044/j.1674-1757.pcrpc.2018.05.016

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Flicker Detection and Source Location Method Based on S-transform

更新时间：2024-09-14

- Flicker Detection and Source Location Method Based on S-transform
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 39, Issue 5, Pages: 87-93(2018)
- 作者机构：
  
  1. 南京工程学院电力学院
  2. 国网青岛供电公司
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2018.05.016
  CLC： TM711
- Published：2018，
- 稿件说明：
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[1]吕干云,武阳,时翔,蒋小伟,吴启宇,吴晨媛.一种基于S变换的闪变检测和源定位方法[J].电力电容器与无功补偿,2018,39(05):87-93.

LYU GANYUN, WU YANG, SHI XIANG, et al. Flicker Detection and Source Location Method Based on S-transform. [J]. Power capacitor & reactive power compensation, 2018, 39(5): 87-93.
[1]吕干云,武阳,时翔,蒋小伟,吴启宇,吴晨媛.一种基于S变换的闪变检测和源定位方法[J].电力电容器与无功补偿,2018,39(05):87-93. DOI： 10.14044/j.1674-1757.pcrpc.2018.05.016.

LYU GANYUN, WU YANG, SHI XIANG, et al. Flicker Detection and Source Location Method Based on S-transform. [J]. Power capacitor & reactive power compensation, 2018, 39(5): 87-93. DOI： 10.14044/j.1674-1757.pcrpc.2018.05.016.

摘要

近年来

电压波动和闪变受到了电力系统和用户的广泛关注。闪变干扰源的准确定位是改善和治理闪变及协调相关供用电纠纷的基本前提。本文基于S变换进行非平稳电压闪变的动态信号处理

实现PCC处电压闪变调制幅值和频率的检测

并分析计算电压和电流动态相量

在此基础上给出闪变源定位的等效模型及其动态参数估计

最后通过上游系统参数、下游负荷电流变化与电压变化量的关系分析

定量地给出电压闪变源定位结果。算例证明

该法能在复杂配电网中完成电压闪变源的正确定位

可应用于电能质量监测系统。

Abstract

In recent years

voltage fluctuations and flicker have received much attention by both utilitiesand consumers. Correct positioning of flicker interference source is the basic premise in improving and con-trolling flicker and coordinating disputes between power supply and consumption. This paper is based onthe dynamic signal treatment of non-stationary voltage flicker based on S-transform（ST）so to achieve de-tection of voltage flicker modulation amplitude and frequency at PPC

analyze and calculate dynamic pha-sor of voltage and current and

on this basis

give the equivalent model of flicker source location and its dy-namic parameter estimation. Finally

the location result of voltage flicker source is given out quantitativelythrough the relation analysis among upstream system parameters

load current variation at downstream andvoltage variation.It is shown by the example that the method can achieve correct location of voltage flickersource in the complex distribution grid and can be used the monitoring system of power quality.

关键词

电压闪变S变换检测源定位动态参数估计

Keywords

voltage flickerS-transformdetectionsource locationdynamic parameters estimation

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