| 引用本文: | 王兴刚,张 虹,徐 政,翁 华,许 烽.基于轨迹灵敏度的多回直流紧急功率提升策略[J].电力自动化设备,2014,34(10): |
| WANG Xinggang,ZHANG Hong,XU Zheng,WENG Hua,XU Feng.Emergency power support for multiple DCs based on trajectory sensitivity[J].Electric Power Automation Equipment,2014,34(10): |
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| 摘要: |
| 直流闭锁故障后，需要择优选择参与紧急功率提升的直流，为此提出一种基于轨迹灵敏度选择最优直流进行紧急功率提升的方法。首先确定各回直流线路故障后对应的领先机组，然后通过计算提升非故障直流线路功率对稳定性改善的灵敏度确定最优的直流功率提升措施，配合直流送端发电机组励磁控制，可以取得良好的控制效果。利用该方法，进一步给出云电外送5回直流的紧急功率提升策略。仿真计算表明，所提方法可以大幅减少直流闭锁故障后的切机量，显著提高系统稳定水平。 |
| 关键词: 直流输电 灵敏度分析 轨迹 直流紧急功率提升 发电机 励磁控制 闭锁 稳定性 |
| DOI： |
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| Emergency power support for multiple DCs based on trajectory sensitivity |
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WANG Xinggang1, ZHANG Hong1, XU Zheng2, WENG Hua3, XU Feng2
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1.Yunnan Power Grid Corporation，Kunming 650011，China;2.College of Electrical Engineering，Zhejiang University，Hangzhou 310027，China;3.Economy Research Institute of State Grid Zhejiang Electric Power Company，Hangzhou 310008，China
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| Abstract: |
| A method based on trajectory sensitivity is proposed for the emergency DC power support during DC blocking fault，which determines the corresponding leading generator of faulty DC link，calculates the sensitivity of each healthy DC link to the improvement of system stability by its DC power increase，works out the emergency DC power support strategy by selecting the optimal DC links，and cooperates with the generator excitation control to achieve an excellent control performance. A strategy of emergency DC power support is given for 5 HVDCs of Yunnan Power. Results of simulative calculation show that，the proposed method can greatly reduce the amount of post-fault generator trip and significantly improve the system stability. |
| Key words: DC power transmission sensitivity analysis trajectory emergency DC power support electric generators excitation control blocking stability |
