| 特高压直流输电线路故障过电压的研究 |
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| 引用本文： | 吴娅妮,蒋卫平,朱艺颖,李新年,呙虎.特高压直流输电线路故障过电压的研究[J].电网技术,2009,33(4):6-10. |
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| 作者姓名： | 吴娅妮 蒋卫平 朱艺颖 李新年 呙虎 |
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| 作者单位： | 中国电力科学研究院,北京市,海淀区,100192
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| 摘 要： | 以±800 kV向家坝-上海特高压直流输电工程为背景，应用电磁暂态计算软件EMTDC建立了特高压直流输电系统模型，详细研究了特高压直流线路距整流站不同距离发生对地闪络故障时过电压的沿线分布及水平，指出直流线路中点故障时非故障极线路中点的过电压幅值最高，并分析了其形成机理，计算分析了杆塔接地电阻、换流站端部阻抗、线路长度及线路参数等因素对线路过电压水平的影响，给出了限制过电压水平的合理性建议。
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| 关 键 词： | 特高压直流 输电线路 直流线路故障 过电压 波过程 |
| 收稿时间： | 2008-07-23 |
Research on Inner Overvoltage in UHVDC Transmission Line Caused by Flashover to Ground Fault |
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| WU Ya-ni,JIANG Wei-ping,ZHU Yi-ying,LI Xin-nian,Guo Hu.Research on Inner Overvoltage in UHVDC Transmission Line Caused by Flashover to Ground Fault[J].Power System Technology,2009,33(4):6-10. |
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| Authors: | WU Ya-ni JIANG Wei-ping ZHU Yi-ying LI Xin-nian Guo Hu |
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| Affiliation: | China Electric Power Research Institute;Haidian District;Beijing 100192;China |
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| Abstract: | Based on concrete parameters of ±800 kV UHVDC transmission system from Xiangjiaba to Shanghai and by use of electromagnetic transient simulation software EMTDC，a model of UHVDC power transmsission system is built; the distribution of inner overvoltage as well as the voltage level along UHVDC transmssion line due to the line-to-ground flashover faults happened at different distances to rectifier station of UHVDC system are researched in detail; it is pointed out that the highest overvoltage appears at the middle point of transmission line belonging to non-faulty pole and the formation mechanism of this phenomenon is analyzed. The influences of following factors, such as tower grounding resistance, termianl impedance of converter station, length of transmission line and parameters of transmission line, on overvoltage level are analyzed and calculated, and feasible suggstions to restrict overvoltage level are given. |
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| Keywords: | UHVDC transmission lines DC line fault overvoltage wave process |
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