分析了西北与华北电网宁东—山东±660 kV高压直流输电工程中的近10项“世界第一”技术创新特点,从系统联网角度阐述了该工程建设的经济和社会效益。根据国家“西电东送”战略要求,通过国家电网的统一规划、建设和调配,西北750 kV骨干电网作为“三华”送端电网的格局已经形成,该直流联网示范工程将西北黄河上游水电、宁东火电打捆外送,对于西北地区煤电、水电、风电等能源大规模外送具有显著的示范作用,将实现更大范围的能源资源优化配置与利用。 This paper analyzes the characteristics of nearly 10 “world first” technological innovations in Ningdong-Shandong ± 660kV HVDC transmission project in Northwest and North China Power Grids, and expounds the economic and social benefits of the project construction from the perspective of system interconnection. According to the national “West to East” strategy, through the unified planning, construction and deployment of the national grid, the pattern of the northwest 750 kV backbone power grid as the “Sanhua” sending-end grid has been formed. The demonstration project of the DC network will Northwest Yellow River hydropower, Ningdong thermal power bundled delivery, for the Northwest coal, hydropower, wind power and other large-scale delivery of energy has a significant demonstration effect, will achieve a wider range of optimal allocation of energy resources and utilization.