1000kV特高压变电站防雷保护和设备绝缘水平

结合我国1000kV晋东南—荆门—南阳试验示范工程系统过电压的计算结果,论述了绝缘配合方法的原理,推荐了本工程变电站的设备绝缘水平。同时对我国已运行的500kV和750kV变电站的直击雷设计和运行经验进行了总结分析,并对1000kV特高压变电站直击雷防护中存在的一些特殊设计问题进行了计算研究,推荐了1000kV变电站对直击雷的防护方法。还对晋东南变电站、南阳开关站和荆门变电站雷电侵入波进行了模拟计算,计算出各种运行方式下变电站开关站的安全运行指标,并根据计算推荐了确保每个变电站安全运行年(1500～2000a)时的避雷器保护方案。

Lightning protection and insulation level of 1 000 kV UHV substation

Combined with the calculation results of overvoltage on the 1 000 kV AC UHV test and demonstration project from southeastern Shanxi province via Nanyang in Henan province to Jingmen in Hubei province of China, the method and theory of insulation coordination was discussed, and insulation level of the substation equipments for this project was recommended. The design and operation experiences of direct lightning stroke shielding of 500 kV and 750 kV substation were analyzed and summarized. Some special design problems on direct lightning stoke shielding of 1 000 kV AC UHV substation were calculated. Then the protection method for direct lightning stroke shielding of 1 000 kV substation was given. Lighting incoming wave protection of Jindongnan substation, Nanyang switching station and Jingmen substation were also be simulated to suggest the number and location of MOA in substation. For different station operating conditions, the safety operation guideline was calculated. According to the calculation results, the MOA installation schemes are put forward for ensuring safety operation of every station in 1 500 - 2 000 years.