| HVDC系统换相失败的临界指标 |
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| 引用本文： | 刘建,李兴源,吴冲,艾飞.HVDC系统换相失败的临界指标[J].电网技术,2009,33(8):8-12. |
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| 作者姓名： | 刘建 李兴源 吴冲 艾飞 |
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| 作者单位： | 刘建,李兴源,艾飞,LIE Jian,LI Xing-yuan,AI Fei(四川大学电气信息学院,四川省,成都市,610065);吴冲,WU Chong(西南电力设计院,四川省,成都市,610021)
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| 基金项目： | 国家重点基础研究专项经费项目，国家科技支撑计划，国家自然科学基金 |
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| 摘 要： | 在电阻性、电感性和电容性条件下，给出了直流系统逆变侧发生单相和三相接地故障时换相失败免疫因子(commutation failure immunity index，CFII)的分布情况。提出了用优化仿真模块快速确定某一故障时刻点换相失败临界阻抗的方法。根据计算得出的CFII分析了直流系统降压运行和降功率运行对换相失败的影响，探讨了交流系统强度与换相失败的关系以及多馈入系统中耦合阻抗与临界当地换相失败风险、临界同时换相失败风险的关系。
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| 关 键 词： | 换相失败 免疫因子 临界阻抗 最优仿真 耦合阻抗 |
| 收稿时间： | 2008-07-10 |
Research on Critical Index of Commutation Failure in HVDC System |
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| LIU Jian,LI Xing-yuan,WU Chong,AI Fei.Research on Critical Index of Commutation Failure in HVDC System[J].Power System Technology,2009,33(8):8-12. |
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| Authors: | LIU Jian LI Xing-yuan WU Chong AI Fei |
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| Affiliation: | 1.School of Electrical Engineering & Information;Sichuan University;Chengdu 610065;Sichuan Province;China;2.Southwest Electric Power Design Institute;Chengdu 610021;China |
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| Abstract: | The distribution of commutation failure immunity index (CFII) is given while single- or three-phase grounding fault happens in AC system at inverter side of HVDC power transmission system, and a method to quickly determine the critical impedance by optimal simulation module at a certain time point when commutation failure occurs is proposed. According to the calculated CFII, the affects of reduced-voltage operation and reduced-power operation of HVDC power transmission system on commutation failure are analyzed, the relation between the strength of AC system and commutation failure is analyzed and the relation among coupling impedance of multi-infeed HVDC power transmission, the risk of critical local commutation failure and the risk of critical simultaneous commutation failure is also researched. |
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| Keywords: | commutation failure immunity index critical impedance optimal simulation coupling impedance |
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