Analysis on Voltage Unbalance to Ground at Low-voltage Side of 750 kV Main Transformer in Qaidam Convertor Station

KANG Jun; LI Qiuyang; QU Quanlei; XIE Pengsheng; LI Yuan; HU Mengchen; PENG Jie

doi:10.13296/j.1001-1609.hva.2015.07.023

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Analysis on Voltage Unbalance to Ground at Low-voltage Side of 750 kV Main Transformer in Qaidam Convertor Station

更新时间：2025-04-26

- Analysis on Voltage Unbalance to Ground at Low-voltage Side of 750 kV Main Transformer in Qaidam Convertor Station
- High VoltageApparatus Vol. 51, Issue 7, Pages: 116-120(2015)
- 作者机构：
  
  国网青海省电力公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2015.07.023
  CLC： TM721.1
- Published：2015
- 稿件说明：
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[1]康钧,李秋阳,曲全磊,谢彭盛,李渊,胡梦晨,彭洁.柴达木换流站750kV主变低压侧电压不平衡原因分析研究[J].高压电器,2015,51(07):116-120.

KANG Jun, LI Qiuyang, QU Quanlei, et al. Analysis on Voltage Unbalance to Ground at Low-voltage Side of 750 kV Main Transformer in Qaidam Convertor Station[J]. High voltageapparatus, 2015, 51(7): 116-120.
[1]康钧,李秋阳,曲全磊,谢彭盛,李渊,胡梦晨,彭洁.柴达木换流站750kV主变低压侧电压不平衡原因分析研究[J].高压电器,2015,51(07):116-120. DOI： 10.13296/j.1001-1609.hva.2015.07.023.

KANG Jun, LI Qiuyang, QU Quanlei, et al. Analysis on Voltage Unbalance to Ground at Low-voltage Side of 750 kV Main Transformer in Qaidam Convertor Station[J]. High voltageapparatus, 2015, 51(7): 116-120. DOI： 10.13296/j.1001-1609.hva.2015.07.023.

摘要

柴达木换流站750 kV主变在投运过程中出现低压侧对地电压不平衡现象。为分析研究引起电压不平衡的原因

提出主变投运建议。基于PSCAD软件

开展了实际运行工况下的仿真计算研究

得到了主变低压侧电压不平衡度与绕组间电容量的关系

分析了750 kV变压器低压侧对地电压不平衡的原因

主要是由主变三相入口对地等效电容量不平衡引起的。对此

提出了相应的解决措施以及主变投运建议。

Abstract

To investigate the voltage unbalance to ground at low-voltage side of the 750 kV main transformer in Qaidam Convertor Station

the software PSCAD is adopted to conduct simulating calculation in actual working condition. As a result

the relation between the voltage unbalance and the winding capacitance is obtained

and the voltage unbalance is found to be caused mainly by the unbalance of equivalent capacitance of the main transformer’s three-phase entrance to ground. Accordingly

corresponding countermeasures are provided.

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Related Institution

North China Electric Power Research Institute Co., Ltd.

Electric Power Research Institute, Jibei Electric Power Co., Ltd.

North China Branch of State Grid Corporation of China

Institute of Electrical Engineering,Chinese Academy of Science

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