Error Characteristics Analysis for UHV Self-calibration CT Using Transient Field-circuit Coupled Analysis Model

WU Xixiu; ZHANG Yuanyuan; FENG Yu; WANG Huan; SHENG Kuang; HUANG Wenbo

doi:10.13296/j.1001-1609.hva.2020.07.022

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Error Characteristics Analysis for UHV Self-calibration CT Using Transient Field-circuit Coupled Analysis Model

更新时间：2025-04-26

- Error Characteristics Analysis for UHV Self-calibration CT Using Transient Field-circuit Coupled Analysis Model
- High VoltageApparatus Vol. 56, Issue 7, Pages: 152-158(2020)
- 作者机构：
  
  1. 武汉理工大学自动化学院
  2. 中国电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.07.022
  CLC： TM933.4
- Published：2020
- 稿件说明：
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[1]吴细秀,张圆圆,冯宇,王欢,盛况,黄文博.基于瞬态场——路耦合法的特高压自校CT误差特性分析[J].高压电器,2020,56(07):152-158.

WU Xixiu, ZHANG Yuanyuan, FENG Yu, et al. Error Characteristics Analysis for UHV Self-calibration CT Using Transient Field-circuit Coupled Analysis Model[J]. High voltageapparatus, 2020, 56(7): 152-158.
[1]吴细秀,张圆圆,冯宇,王欢,盛况,黄文博.基于瞬态场——路耦合法的特高压自校CT误差特性分析[J].高压电器,2020,56(07):152-158. DOI： 10.13296/j.1001-1609.hva.2020.07.022.

WU Xixiu, ZHANG Yuanyuan, FENG Yu, et al. Error Characteristics Analysis for UHV Self-calibration CT Using Transient Field-circuit Coupled Analysis Model[J]. High voltageapparatus, 2020, 56(7): 152-158. DOI： 10.13296/j.1001-1609.hva.2020.07.022.

摘要

随着特高压工程的推进

CT现场校验成为亟需解决的难题。由于国内外对此问题研究尚属空白

为解决该难题

提出将实验室CT校验用的自校法应用于现场交接试验。在解决了一系列自校法工程应用问题的基础上

重点针对CT校验误差展开研究。首先分析了具有自校功能CT的结构特征

并在此基础上根据CT误差定义对其误差特性进行了理论分析;讨论了影响误差的主要因素;为计算误差大小

建立了基于有限元法瞬态场—路耦合CT误差分析模型;利用该模型分别对CT两种工作模式（测量用和校验用）下的误差进行计算

并与实际测量结果比较。结果表明:具有自校功能的CT作测量用及作自校用时的仿真误差及实际测量误差均小于0.1%

满足特高压CT校验精度要求。

Abstract

With the construction of UHV projects

CT site calibration has become an urgent problem which prevents it further applying. However

there almost no scientific research institution and scholars carry out research on this new problem. To solve this problem

a self-calibration method is proposed for site calibration. Focusing on the most important problem of CT calibration

the calibration error is studied. According to the CT error definition and the structural features of self-calibration CT

the error characteristics and the influencing factors of the self-calibration CT are analyzed

and the transient field-circuit coupled method is proposed to calculate the error. Based on the finite element transient field circuit coupling principle

the field-circuit coupled model is established. Then the errors of two methods are calculated and analyzed. The results show that: the simulation errors and actual measurement errors of CT with two different situations are less than 0.1%. It is up to the accuracy class and it satisfies the UHV CT calibration requirements.

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