鲁固特高压直流黄河大跨越绝缘配合、防雷和接地设计

Design of Insulation Coordination,Lightning Protection and Grounding for Lugu UHVDC Crossing the Yellow River

鲁固特高压直流是外电入鲁继±660 kV银东线、±800 kV昭沂直流后的第3条直流输电通道,在山东境内跨越黄河,主跨越档距超过1300 m,最高铁塔高度接近140 m,设计阶段需按照大跨越设计。结合工程实际和以往大跨越工程经验,重点介绍了黄河大跨越的绝缘配合原则及配置结论,同时通过对大跨越线路的耐雷水平、闪络率的计算,给出了防雷和接地的配置结论,可为后续工程的黄河大跨越提供设计参考。

Lugu UHVDC,as the third DC transmission channel after±660 kV Yindong and±800 kV Zhaoyi UHVDC transmission lines for importing external power to Shandong province,should be built cross the Yellow River.The design of the crossing has a main span was over 1300 meters with the highest tower over 140 meters tall.The project was designed to comply with large span standard.Based on the engineering practice and the past experience of large span projects,the insulation coordination principle and configuration conclusion are introduced for the Yellow River large span.At the same time,by calculating the lightning resistance level and flashover rate of long-span transmission lines,the configuration conclusion of lightning protection and grounding is given,which can provide design reference for the follow-up project of large-span crossing of the Yellow River.