| 引用本文: | 张 烁,李永丽,李博通.高压直流输电系统开路电压的研究[J].电力自动化设备,2015,35(11): |
| ZHANG Shuo,LI Yongli,LI Botong.Open line voltage of HVDC transmission system[J].Electric Power Automation Equipment,2015,35(11): |
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| 摘要: |
| 针对现有高压直流输电系统开路电压公式不适用于计算带直流线路开路试验开路电压的问题，分别对带／不带直流线路开路试验的试验原理及开路电压建立过程进行分析，解释了带直流线路开路试验中开路电压较小的原因，并通过对现有开路电压计算公式进行修正，给出了适用于带直流线路开路试验的开路电压计算公式。所提公式可用以修正直流开路试验电压差值保护整定值，避免了带线路开路试验中电压差值保护的误动。利用PSCAD仿真软件搭建 ± 500 kV高压直流输电系统仿真模型，对所提公式进行了仿真验证。仿真结果证明所提公式具有较高的准确性。 |
| 关键词: 高压直流输电 高压直流输电开路试验 开路电压 触发角 直流线路参数 滤波器 仿真 模型 |
| DOI： |
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| Open line voltage of HVDC transmission system |
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ZHANG Shuo, LI Yongli, LI Botong
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Key Laboratory of Power System Simulation and Control of Ministry of Education，Tianjin University，Tianjin 300072，China
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| Abstract: |
| The existing open line voltage formula of HVDC system is not applicable to the open line voltage calculation of OLT（Open Line Test） with DC line，for which，the test principle and the set-up process of open line voltage are analyzed respectively for OLT with and without DC line and the reason why the open line voltage of OLT with DC line is smaller is explained. An improved open line voltage formula is given for the OLT with DC line，which is used to correct the setting of OLT voltage differential protection to avoid its misoperation. The simulation model of typical ± 500 kV HVDC transmission system is built with PSCAD and the simulative results show the higher accuracy of the improved formula. |
| Key words: HVDC power transmission HVDC open line test open line voltage firing angle DC line parameters electric filters computer simulation models |
