| 引用本文: | 李欢,赵晓斌,杨煜.高压直流工程熄弧角测量异常引发换相失败故障的分析与处理[J].电力自动化设备,2019,39(3): |
| LI Huan,ZHAO Xiaobin,YANG Yu.Analysis and treatment of commutation failure caused by abnormal extinction angle in HVDC system[J].Electric Power Automation Equipment,2019,39(3): |
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| 摘要: |
| 南方电网某直流工程在调试期间发生了数次换相失败故障，对交直流都产生了较大的影响。对换相失败时的故障录波数据进行分析，推断换相失败原因为熄弧角测量系统偶发故障而引起直流控制系统误动，基于此推断在该直流工程的详细PSCAD模型中进行了模拟，对该故障进行了仿真复现，验证了故障原因分析的正确性。为解决熄弧角测量装置偶发异常的问题，提出在直流控制系统内增加防误逻辑环节屏蔽熄弧角测量异常的影响，并用PSCAD/EMTDC仿真验证了该处理方案的效果，仿真结果和实际运行表明所提解决方案对熄弧角测量异常问题是有效的，确保了高压直流系统的正常稳定运行。 |
| 关键词: 高压直流输电 熄弧角测量异常 换相失败 仿真 |
| DOI：10.16081/j.issn.1006-6047.2019.03.034 |
| 分类号:TM721.1 |
| 基金项目:南方电网公司科技项目(ZBKJXM20180104) |
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| Analysis and treatment of commutation failure caused by abnormal extinction angle in HVDC system |
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LI Huan, ZHAO Xiaobin, YANG Yu
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State Key Laboratory of HVDC, Electric Power Research Institute, China Southern Power Grid, Guangzhou 510663, China
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| Abstract: |
| Several commutation failures occurred during commissioning of a HVDC project in China Southern Power Grid, which had a great impact on both AC and DC power systems. The transient fault recording data during the commutation failure is analyzed. It is concluded that the reason of the commutation failure is the malfunction of the HVDC control system caused by the accidental failure of the extinguishing angle measurement system. Based on this inference, the detailed PSCAD model of the HVDC project is established, and the fault is simulated and reproduced, which verifies the correctness of the fault cause analysis. In order to resolve the occasional abnormality of the extinction angle measuring device, an anti-error logic link is added in the control system to shield the abnormality of the extinction angle measurement. The effect of the proposed solution is verified by PSCAD/EMTDC simulation, simulative results and actual operation show that the proposed solution is effective for abnormal measurement of extinction angle and ensures safe and stable operation of HVDC system. |
| Key words: HVDC power transmission abnormal measurement of extinction angle commutation failure simulation |
