| 引用本文: | 尹纯亚,李凤婷,陈伟伟,张增强.单极闭锁引起直流健全极换相失败分析[J].电力自动化设备,2019,39(11): |
| YIN Chunya,LI Fengting,CHEN Weiwei,ZHANG Zengqiang.Commutation failure risk analysis of sound pole caused by DC monopole blocking[J].Electric Power Automation Equipment,2019,39(11): |
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| 摘要: |
| 推导建立了换相失败的数学模型，得出送、受端换流母线电压比值是引起换相失败的主要原因，单极闭锁后健全极存在换相失败的风险。分析了单极闭锁引起暂态过电压的影响因素，并推导出直流闭锁后的暂态过电压定量计算解析表达式，提出一种单极闭锁后考虑两侧换流母线电压的换相失败判据，并得出送端、受端短路容量与换相失败的关系。最后基于DIgSILENT仿真平台搭建 ±800 kV天中直流输电系统仿真模型，仿真结果验证了暂态过电压计算方法的正确性，同时证明了单极闭锁后健全极存在换相失败的风险。 |
| 关键词: 高压直流输电 电力传输 换相失败 单极闭锁 暂态过电压 关断角 |
| DOI：10.16081/j.epae.201910021 |
| 分类号:TM721.1;TM46 |
| 基金项目:国网新疆电力公司科技项目(SGXJJY00GHJS180?0065)；新疆维吾尔自治区科技支疆项目(2017E0277) |
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| Commutation failure risk analysis of sound pole caused by DC monopole blocking |
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YIN Chunya1, LI Fengting1, CHEN Weiwei2, ZHANG Zengqiang2
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1.College of Electrical Engineering, Xinjiang University, Urumqi 830047, China;2.Economic Research Institute, State Grid Xinjiang Electric Power Corporation, Urumqi 830011, China
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| Abstract: |
| Based on the establishment of a mathematical CF(Commutation Failure) model, it is indicated that, the ratio of commutation bus voltage between send-terminal and receive-terminal is the main factor for CFs, and risk of sound pole CFs exists when a MPB(Mono-Pole Blocking) occurs. Influences leading to overvoltage when MPB occurs are analyzed, an expression for quantitative calculation of transient overvol-tage after MPB is deduced, and a criterion of CFs after MPB considering bus overvoltage at send-and receive-terminals is proposed, and the relationship between send/receive terminal short-circuit capacity and CFs is obtained. Based on a simulation model of ±800 kV HVDC(High Voltage Direct Current) system established on DIgSILENT, the validity of transient overvoltage calculation and risk of sound pole CFs existence are verified through simulations. |
| Key words: HVDC power transmission electric power transmission commutation failure DC monopole bloc-king transient overvoltage extinction angle |
