| 引用本文: | 陈仕龙,束洪春,甄 颖.云广特高压直流输电负极运行换相失败及控制研究[J].电力自动化设备,2013,33(6): |
| CHEN Shilong,SHU Hongchun,ZHEN Ying.Commutation failure of Yun-Guang UHVDC transmission system running in negative pole state and its control measures[J].Electric Power Automation Equipment,2013,33(6): |
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| 摘要: |
| 总结直流输电换相失败的判断标准，研究防止继发性换相失败的控制措施。以云广± 800 kV特高压直流输电负极运行为研究对象，利用输电系统实际参数在PSCAD／EMTDC上建立仿真模型，仿真结果表明：减小变压器变比，逆变器不发生换相失败，当增大变比到3.52时，逆变器发生换相失败；三相对称接地短路故障时换相失败对于故障合闸角没有敏感性，两相短路和单相接地短路在故障合闸角为90° 和270° 时最容易引发逆变器换相失败；接地电阻的大小和故障持续时间对换相失败影响很大。 |
| 关键词: 特高压输电 高压直流输电 换相失败 仿真 模型 PSCAD／EMTDC 控制系统 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目（50977039，５１１０５１８３， ５１２６７００８） |
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| Commutation failure of Yun-Guang UHVDC transmission system running in negative pole state and its control measures |
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CHEN Shilong, SHU Hongchun, ZHEN Ying
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Faculty of Electric Power Engineering，Kunming University of Science and Technology，Kunming 650051，China
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| Abstract: |
| The causes of commutation failure in UHVDC transmission system are analysed，its criterion is summarized and the control measures against the consequential commutation failure are studied. The simulation model of Yun-Guang ± 800 kV UHVDC transmission system with its actual parameters is built on PSCAD／EMTDC. The simulative results show that，the decrease of transformer ratio will not induce the commutation failure of inverter while its increase up to 3.52 will do；the commutation failure is not sensitive to the fault close angle for symmetrical three-phase grounding fault while it is sensitive to the fault close angle for two-phase short circuit fault and single-phase grounding fault，and the commutation failure occurs easily when the fault close angle is 90° or 270°；the grounding resistance and fault duration time have great influence on commutation failure. |
| Key words: UHV power transmission ＨＶＤＣ power transmission commutation failure computer simulation models PSCAD／EMTDC control systems |
