短路工况下柔直换流站直流场内瞬态电场预测分析

doi:10.11930/j.issn.1004-9649.201912137

中国电力 ›› 2021, Vol. 54 ›› Issue (9): 109-118.DOI: 10.11930/j.issn.1004-9649.201912137

短路工况下柔直换流站直流场内瞬态电场预测分析

吴思航¹, 沈弘¹, 齐磊¹, 裘鹏², 蒯朝霞¹

1. 新能源电力系统国家重点实验室(华北电力大学)，北京 102206;
2. 国网浙江省电力公司电力科学研究院，浙江杭州 310014

收稿日期:2019-12-25 修回日期:2020-02-21 发布日期:2021-09-14
作者简介:吴思航(1997-),男,硕士研究生,从事电力系统电磁兼容方面的研究,E-mail:13261687255@163.com;沈弘(1995-),男,博士研究生,从事电力系统电磁兼容方面的研究,E-mail:shenhong1995@outlook.com;齐磊(1978-),男,通信作者,博士,教授,从事先进输变电技术、电力系统电磁兼容方面的研究,E-mail:qilei_ncepu@126.com
基金资助:
国家电网公司科技项目(柔性直流输电工程短路试验的理论研究及现场实践，52110418003F)

Prediction and Analysis of Transient Electric Field in DC Yard of Flexible Converter Station Under Short-Circuit Conditions

WU Sihang¹, SHEN Hong¹, QI Lei¹, QIU Peng², KUAI Zhaoxia¹

1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Beijing 102206, China;
2. State Grid Zhejiang Electric Power Research Institute, Hangzhou 310014, China

Received:2019-12-25 Revised:2020-02-21 Published:2021-09-14
Supported by:
This work is supported by Science and Technology Project of SGCC (Theoretical Research and Practical Application of Short Circuit Test in VSC-HVDC Project, No. 52110418003F)

摘要/Abstract

摘要： 柔性直流换流站在发生短路故障时会产生瞬态强电磁场，对换流站内的二次设备产生潜在影响。针对定海换流站短路试验时二次设备处的电场骚扰问题进行了系统研究，分析了短路故障时直流场内关键节点的电位，建立了直流场内设备的三维模型。考虑直流断路器分断时的时变拓扑结构，将获得的直流场内各节点电位函数作为电准静态场求解区域的第1类边界条件，分别计算了3种短路工况下直流断路器周围二次设备处的电场分布。研究结果表明，二次设备处电场强度最高可达33 kV/m，上升下降沿最快为40 μs；电场强度的大小由空间布局和电压幅值共同决定，电场强度波形与电压波形上升下降沿一致。

关键词: 柔性直流换流站, 人工短路试验, 混合式直流断路器, 电磁兼容

Abstract: In the case of short-circuit fault, the flexible DC converter station would produce transient yet strong electromagnetic field, which would impact on the secondary equipment in the converter station. In this paper, the problem of electric field disturbance at the secondary equipment in the short circuit test of Dinghai converter station was studied systematically. The potential of the key nodes in the DC field was analyzed, and 3D model of the equipment in the DC field was established. Considering the time-varying topological structure of the DC circuit breaker, the potential function of each node in the DC field was taken as the first boundary condition of the electric quasi-static field solution area, and the electric field distribution of the secondary equipment around the DC circuit breaker under three kinds of short-circuit conditions was calculated accordingly. The following facts were revealed by the simulation results: the maximum electric field strength is 33 kV/m; the maximum rise and fall edge is 40 μs; the electric field strength could be determined by the spatial layout and voltage amplitude; and the electric field strength waveform would be consistent with the rise and fall edge of the voltage waveform.

Key words: flexible DC converter station, artificial short circuit test, hybrid DC circuit breakers, electromagnetic compatibility

吴思航, 沈弘, 齐磊, 裘鹏, 蒯朝霞. 短路工况下柔直换流站直流场内瞬态电场预测分析[J]. 中国电力, 2021, 54(9): 109-118.

WU Sihang, SHEN Hong, QI Lei, QIU Peng, KUAI Zhaoxia. Prediction and Analysis of Transient Electric Field in DC Yard of Flexible Converter Station Under Short-Circuit Conditions[J]. Electric Power, 2021, 54(9): 109-118.

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https://www.electricpower.com.cn/CN/Y2021/V54/I9/109

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短路工况下柔直换流站直流场内瞬态电场预测分析

Prediction and Analysis of Transient Electric Field in DC Yard of Flexible Converter Station Under Short-Circuit Conditions

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短路工况下柔直换流站直流场内瞬态电场预测分析

Prediction and Analysis of Transient Electric Field in DC Yard of Flexible Converter Station Under Short-Circuit Conditions

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