| 三端柔性直流输电系统雷电侵入波过电压 |
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| 引用本文： | 厉天威,刘大鹏,雷园园,赵宇明,项阳,黎小林.三端柔性直流输电系统雷电侵入波过电压[J].电力建设,2014(3):13-17. |
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| 作者姓名： | 厉天威 刘大鹏 雷园园 赵宇明 项阳 黎小林 |
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| 作者单位： | 南方电网科学研究院;西安西电电力系统公司; |
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| 摘 要： | 雷电侵入波过电压是确定直流输电系统换流站设备绝缘水平的重要依据,利用PSCAD/EMTDC软件建立了±160 kV南澳三端柔性直流输电系统直流侧雷电侵入波仿真计算模型,利用电气几何模型法计算直流线路的最大绕击电流,采用相交法作为空气间隙闪络判据,计算直流线路遭受雷电绕击和反击后换流站内极母线设备以及连接电缆承受的电压应力,并校核各设备的雷电冲击绝缘水平,计算结果表明各设备的绝缘裕度满足要求.
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| 关 键 词： | 柔性直流输电 雷电侵入波 过电压 电气几何模型 |
Lighting Intruding Wave Overvoltage of Three-Terminal Flexible DC Transmission System |
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| Affiliation: | LI Tianwei, LIU Dapeng , LEI Yuanyuan , ZHAO Yuming , XIANG Yang, LI Xiaoli ( 1. Electric Power Research Institute, CSG, Guangzhou 510080, China; 2. Xi＇ an XD Power Systems Co. , Ltd. , Xi＇ an 710077, China) |
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| Abstract: | ： The overvoltage of lightning intruding wave is the important basis for determining equipment insulation level in DC transmission system converter station. This paper built the simulation calculation model of lightning intruding wave for ±160 kV Nan＇ ao three-terminal flexible DC transmission system at DC side, with using PSCAD/EMTDC software. Then, the maximum shielding failure current of DC transmission line was calculated by electrical geometry model （EGM） and the intersection method was used as the criterion for air gap flashover. Finally, the voltage stresses of pole bus equipment and connection cable were calculated for the convertor station after DC transmission line suffering from the lightning shielding failure and counterattack, and the equipment＇ s insulation level for lightning impulse was checked. The results show that the insulation margin of the equipment meets the requirements. |
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| Keywords: | flexible DC transmission lightning intruding wave overvoltage electrical geometry model |
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