Adaptive Analysis of Metering Error for CVT

LIU Zhen; LI Lin; ZHANG Da; LIU Liangshuai

doi:10.14044/j.1674-1757.pcrpc.2021.06.017

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Adaptive Analysis of Metering Error for CVT

更新时间：2024-09-14

- Adaptive Analysis of Metering Error for CVT
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 42, Issue 6, Pages: 115-120(2021)
- 作者机构：
  
  1. 国网河北省电力有限公司电力科学研究院
  2. 国网电力科学研究院武汉南瑞有限责任公司
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2021.06.017
  CLC： TM451.2
- Published：2021，
- 稿件说明：
移动端阅览
LIU ZHEN, LI LIN, ZHANG DA, et al. Adaptive Analysis of Metering Error for CVT. [J]. Power capacitor & reactive power compensation, 2021, 42(6): 115-120.
DOI：

LIU ZHEN, LI LIN, ZHANG DA, et al. Adaptive Analysis of Metering Error for CVT. [J]. Power capacitor & reactive power compensation, 2021, 42(6): 115-120. DOI： 10.14044/j.1674-1757.pcrpc.2021.06.017.

摘要

传统互感器检测采用人工读取误差的方法

信息化水平较低

检测效率较低

并不适应自动化抽检的要求。本文提出一种基于大数据分析的互感器检测方法

可读取海量的电容式互感器(capacitor voltage transformer

CVT)比差和角差数据

采用移动窗的方法提取特征数据

并自适应更新误差限值

在不借助互感器校验仪的前提下

可自动实现待测互感器的精度评估。最后开展了标准PT(电压互感器)测量数据的CVT复现测试

试验表明

该方法可用于长期运行的CVT海量数据分析

较传统主元分析方法

精度更高

不受电网波动影响。本文方法可为互感器校验考核提供一定的参考。

Abstract

The detection of traditional instrument transformer adopts the method of artificially reading error

which has low information level and low detection efficiency and cannot meet the requirements of automatic sampling inspection.A kind of detection method of instrument transformer

proposed in this paper on the basis of big data analysis

can read mass ratio and angle difference data of capacitor voltage transformer（CVT）. The feature data can be extracted by adopting the moving window method and the error limit can be updated adaptively. It can achieve automatically the accuracy assessment of the instrument transformer to be tested without the aid of the calibrator of instrument transformer. Finally

the CVT repetition test for measurement data of standard PT is performed. The test shows that this method can be used for long-term mass data analysis of CVT which

compared with traditional principal component analysis method

has higher accuracy and is free from the fluctuation of power grid. The method in this paper can provide some reference for calibration and inspection of instrument transformer.

关键词

电容式电压互感器自适应评估计量误差统计量主元分析

Keywords

capacitor voltage transformeradaptive assessmentmetering errorstatistical magnitudeprincipal componentanalysis

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Related Institution

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