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| 引用本文: | 邓旭,王东举,沈扬,等.舟山多端柔性直流输电工程换流站内部暂态过电压[J].电力系统保护与控制,2013,41(18):111-119.[点击复制] |
| DENG Xu,WANG Dong-ju,SHEN Yang,et al.Research on transient overvoltage for converter station of Zhoushan multi-terminal VSC-HVDC project[J].Power System Protection and Control,2013,41(18):111-119[点击复制] |
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| 舟山多端柔性直流输电工程换流站内部暂态过电压 |
| 邓旭1,王东举1,沈扬2,陈锡磊3,周浩1,孙可4 |
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| (1.浙江大学电气工程学院，浙江 杭州 310027;2.浙江省电力设计院，浙江 杭州 310014;3.浙江省慈溪市供电局，浙江 慈溪 315300;4.浙江省电力公司，浙江 杭州 310027) |
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| 摘要: |
| 舟山多端柔性直流输电工程建成后将成为世界上第一个基于模块化多电平换流器(Modular Multilevel Converter, MMC)的五端柔性直流输电工程。为研究各换流站的过电压水平，依托舟山多端柔性直流输电示范工程，详细分析了换流站交直流侧的过电压机理，建立了基于详细控制保护策略的五端柔性直流输电系统过电压仿真模型，计算了换流站联结变压器阀侧单相接地、桥臂电抗器阀侧单相接地、直流极线接地、直流平波电抗器阀侧直流母线接地和直流极间短路等故障在换流站关键设备上产生的过电压。结果表明：联结变压器阀侧交流母线上的最大过电压为360 kV；直流极线上的最大过电压为370 kV，直流平波电抗器阀侧直流母线的最大过电压为369 kV，避雷器CB和D承受的最大能量分别为1.258 MJ和1.655 MJ；星形电抗接地支路中性点上的最大过电压为188 kV；桥臂电抗器两端产生的最大过电压为235 kV。计算结果可为该工程换流站的绝缘配合研究以及相关设备的选型、试验等提供重要依据。 |
| 关键词: 多端柔性直流 MMC 换流站 暂态过电压 避雷器 能量 |
| DOI：10.7667/j.issn.1674-3415.2013.18.019 |
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| 基金项目: |
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| Research on transient overvoltage for converter station of Zhoushan multi-terminal VSC-HVDC project |
| DENG Xu1,WANG Dong-ju1,SHEN Yang2,CHEN Xi-lei3,ZHOU Hao1,SUN Ke4 |
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| Abstract: |
| Zhoushan multi-terminal VSC-HVDC project will be the first DC transmission project with five converter stations in the world which is based on modular multilevel converter (MMC) technology. To study the overvoltage of each converter station, overvoltage mechanism of AC and DC switchyard are analyzed in detail based on this project, and overvoltage levels in typical faults such as single-phase-to-ground fault at the valve side of converter transformer and at the valve side of converter reactor, DC pole line ground fault, ground fault at the valve side of DC smoothing reactor and DC to DC pole line fault are calculated based on the MMC-HVDC model with five stations. Results show that the maximum overvoltage for AC bus at the valve side of converter transformer is 360 kV; the maximum overvoltage for DC bus at the line side and at the valve side of the DC smoothing reactor are 370 kV and 369 kV respectively; the maximum overvoltage of the neutral point of star reactance grounded branch and converter reactor are 188 kV and 235 kV respectively; the maximum energy of arrester CB and D are 1.258 MJ and 1.655 MJ respectively. The research results will provide important basis for the insulation coordination of station devices. |
| Key words: multi-terminal VSC-HVDC MMC converter station transient overvoltage arrester energy |
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