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特高压换流变压器对称性涌流的生成及其对大差保护的影响
引用本文:翁汉琍,李雪华,鲁俊生,李振兴,万毅,林湘宁.特高压换流变压器对称性涌流的生成及其对大差保护的影响[J].电力系统自动化,2017,41(5):153-158.
作者姓名:翁汉琍  李雪华  鲁俊生  李振兴  万毅  林湘宁
作者单位:三峡大学电气与新能源学院, 湖北省宜昌市 443002,三峡大学电气与新能源学院, 湖北省宜昌市 443002,强电磁工程与新技术国家重点实验室(华中科技大学), 湖北省武汉市 430074,三峡大学电气与新能源学院, 湖北省宜昌市 443002,三峡电能有限公司, 湖北省宜昌市 443002,强电磁工程与新技术国家重点实验室(华中科技大学), 湖北省武汉市 430074
基金项目:国家自然科学基金资助项目(51607106)
摘    要:借鉴和应涌流分析方法,分析特高压一组换流变压器空投时对称性涌流的产生机理和变化特点。基于工程实际参数建立详尽的特高压直流输电的仿真模型,对特高压换流站内一组换流变压器空投产生对称性涌流现象进行了仿真分析。阐明二次谐波制动判据失去闭锁能力造成特高压换流变压器大差保护误动的机理,为提升特高压换流站大差保护的动作可靠性提供分析手段。

关 键 词:特高压换流变压器  对称性涌流  大差保护  和应涌流  二次谐波制动判据
收稿时间:2016/4/20 0:00:00
修稿时间:2017/1/13 0:00:00

Symmetrical Inrush Current Mechanism of Ultra-high Voltage Converter Transformer and Its Impact on Converter Connection-transformer Differential Protection
WENG Hanli,LI Xuehu,LU Junsheng,LI Zhenxing,WAN Yi and LIN Xiangning.Symmetrical Inrush Current Mechanism of Ultra-high Voltage Converter Transformer and Its Impact on Converter Connection-transformer Differential Protection[J].Automation of Electric Power Systems,2017,41(5):153-158.
Authors:WENG Hanli  LI Xuehu  LU Junsheng  LI Zhenxing  WAN Yi and LIN Xiangning
Affiliation:College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China,College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China,State Key Laboratory of Advanced Electromagnetic Engineering and Technology(Huazhong University of Science and Technology), Wuhan 430074, China,College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China,Three Gorges Electric Energy Co. Ltd., Yichang 443002, China and State Key Laboratory of Advanced Electromagnetic Engineering and Technology(Huazhong University of Science and Technology), Wuhan 430074, China
Abstract:By drawing on the analytical method of sympathetic inrush current, the generation mechanism and variation characteristics of symmetrical inrush current caused by the energization of a set of two ultra-high voltage(UHV)converter transformers are dealt with. Based on an ultra-high voltage direct current(UHVDC)transmission project simulation model, the phenomenon of symmetrical inrush currents in the cases of UHV converter transformer energization are simulated. The reason for failure of the secondary harmonic restraint criterion to block the converter connection-transformer differential protection is explained, which provides a means for enhancing the operation reliability of the converter transformer differential protection for UHV converter stations.
Keywords:ultra-high voltage(UHV)converter transformer  symmetrical inrush current  converter connection-transformer differential protection  sympathetic inrush current  secondary harmonic restraint criterion
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