| 引用本文: | 李瑞芳,曹晓斌,张先怡,陈 奎,沈佳杰.±800 kV ／500 kV交直流混联输电线路反击耐雷水平[J].电力自动化设备,2015,35(10): |
| LI Ruifang,CAO Xiaobin,ZHANG Xianyi,CHEN Kui,SHEN Jiajie.Back-flashover resistance level of ± 800 kV／500 kV AC-DC hybrid transmission lines[J].Electric Power Automation Equipment,2015,35(10): |
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| 摘要: |
| 采用PSCAD／EMTDC建立了± 800kV／500kV交直流混联输电线路反击耐雷水平仿真模型，讨论了杆塔接地电阻、绝缘子片数、雷电流波形、杆塔高度、避雷器变化对耐雷水平的影响，着重从分流系数的角度分析了接地电阻影响反击耐雷水平的原因，比较了± 800 kV／500 kV交直流混联输电线路和500 kV同塔双回线路、± 800 kV直流线路的反击耐雷水平。理论分析表明：在交直流混联线路中，± 800 kV线路的反击耐雷水平是其交流500 kV线路的2倍以上；反击耐雷水平在接地电阻为某一定值时急剧降低；交直流混联线路中，交流线路和直流线路的反击耐雷水平分别大于单独500kV同塔双回线路、±800kV直流线路。 |
| 关键词: 交直流混联 反击 耐雷水平 分流系数 PSCAD／ EMTDC 交流输电 直流输电 |
| DOI： |
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| 基金项目:中央高校基本科研业务费专项资金资助项目（268-2014CX022） |
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| Back-flashover resistance level of ± 800 kV／500 kV AC-DC hybrid transmission lines |
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LI Ruifang1, CAO Xiaobin1, ZHANG Xianyi2, CHEN Kui1, SHEN Jiajie3
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1.School of Electrical Engineering，Southwest Jiaotong University，Chengdu 610031，China;2.Sichuan Electric Power Design & Consulting Co.，Ltd.，Chengdu 610000，China;3.Texas Instruments Semiconductor Technology Co.，Ltd.，Shanghai 200122，China
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| Abstract: |
| A simulation model of back-flashover resistance level is built based on PSCAD／EMTDC for ± 800 kV／500 kV AC-DC hybrid transmission lines and the effect of tower grounding resistance，insulator piece quantity，lightning waveform，tower height and lightning arrester on the back-flashover resistance level is discussed. The effect of grounding resistance on the level is emphatically analyzed from the aspect of shunt coefficient. The back-flashover resistance level of ± 800 kV／500 kV AC-DC hybrid transmission lines is compared with that of 500 kV dual-loop lines on same tower and that of ± 800 kV DC line respectively. The theoretical analysis shows that：as the ± 800 kV／500 kV AC-DC hybrid transmission lines，the back-flashover resistance level of its ± 800 kV line is above two times higher than that of its AC 500 kV line，while the back-flashover resistance level of its AC and DC line is higher than that of stand-alone ± 800 kV DC line and 500 kV dual-loop lines respectively；the back-flashover resistance level drops abruptly when the grounding resistance reaches a certain value. |
| Key words: AC-DC hybrid back flashover lightning resistance level shunt coefficient PSCAD／EMTDC AC power transmission DC power transmission |
