Analysis on DC Magnetic Bias and Reactive Loss Characteristics of UHV Autotransformer Based on PSCAD

YANG Peihong; FENG Shiwei; KANG Lan; LI Ya

doi:10.13296/j.1001-1609.hva.2019.10.033

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Analysis on DC Magnetic Bias and Reactive Loss Characteristics of UHV Autotransformer Based on PSCAD

更新时间：2025-04-26

- Analysis on DC Magnetic Bias and Reactive Loss Characteristics of UHV Autotransformer Based on PSCAD
- High VoltageApparatus Vol. 55, Issue 10, Pages: 204-209+215(2019)
- 作者机构：
  
  1. 内蒙古科技大学信息工程学院
  2. 内蒙古科技大学矿业与煤炭学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2019.10.033
  CLC： TM411.3
- Published：2019
- 稿件说明：
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[1]杨培宏,冯士伟,亢岚,李亚.基于PSCAD的特高压自耦变直流偏磁及无功损耗特性分析[J].高压电器,2019,55(10):204-209+215.

YANG Peihong, FENG Shiwei, KANG Lan, et al. Analysis on DC Magnetic Bias and Reactive Loss Characteristics of UHV Autotransformer Based on PSCAD[J]. High voltageapparatus, 2019, 55(10): 204-209+215.
[1]杨培宏,冯士伟,亢岚,李亚.基于PSCAD的特高压自耦变直流偏磁及无功损耗特性分析[J].高压电器,2019,55(10):204-209+215. DOI： 10.13296/j.1001-1609.hva.2019.10.033.

YANG Peihong, FENG Shiwei, KANG Lan, et al. Analysis on DC Magnetic Bias and Reactive Loss Characteristics of UHV Autotransformer Based on PSCAD[J]. High voltageapparatus, 2019, 55(10): 204-209+215. DOI： 10.13296/j.1001-1609.hva.2019.10.033.

摘要

由于特高压自耦变易受直流偏磁电流的影响

随着中国1 000 kV特高压电网逐步投入运行

研究1 000 kV特高压自耦变直流偏磁影响下的无功损耗特性具有重要意义。文中针对我国自主研发的1 000 kV特高压自耦变

首先依据自耦变直流偏磁下励磁电流与磁链的非线性曲线

建立偏磁电流与无功损耗间的数学模型;然后利用厂家所提供的1 000 kV特高压U-I曲线与铭牌参数

在PSCAD平台中建立仿真模型

进行特高压自耦变直流偏磁仿真研究

仿真结果表明

特高压自耦变单相无功损耗与单相直流偏磁电流近似呈线性关系

与理论分析的结论一致;最后根据仿真计算结果获得了自耦变单相无功损耗与单相直流偏磁电流间的比例关系

其中

空载时其比例系数为0.77;额定负载时其比例系数为0.76。

Abstract

Since the UHV autotransformer is susceptible to the DC magnetic bias

it is necessary to research the reactive loss characteristics of the autotransformer under the influence of DC magnetic bias. Focusing on the 1 000 kV UHV autotransformer developed by Chinese

this study establishes a mathematical model to describe the relationship between DC magnetic bias and reactive loss according to the nonlinear curve of excitation current and flux linkage of the autotransformer with DC magnetic bias. Then

a simulation model is built on PSCAD platform using the data of 1 000 kV UHV U-I curve and the nameplate parameters provided by the manufacturer

in order to analyze the DC magnetic bias phenomenon of the autotransformer. Simulation results show that the single-phase reactive loss of the autotransformer has an approximately linear relation with the single-phase DC magnetic bias

which is exactly consistent with the theoretical analysis. As a result

the proportional relation between the single-phase reactive loss and the single-phase DC magnetic bias is obtained from the simulation results — the proportional factor is respectively 0.77 and 0.76 under no-load condition and rated load condition.

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