中通道“西电东送”规划研究概论

Outline of Study on Planning of "West Power Transmission to the East" in the Middle Passage

中通道“西电东送”是将西部的三峡水电、四川水电和金沙江梯级水电送往华中、华东和福建地区。三峡电力供电范围为上海市、浙江省、江苏省、安徽省、湖南省、湖北省、江西省、河南省和广东省八省一市。四川水电的特点是具有丰富的可开发资源 ,可形成较好的调节性能 ,可建设大、中、小水电站。四川电力在外送华东、华中、福建电网的同时 ,也将向重庆、广东送电。金沙江电力“西电东送”是对金沙江溪洛渡和向家坝水电站的电力在大区之间消纳和在各大区内分省消纳。输电系统中 ,在对送电方式分别按纯直流、纯交流、交直流混合方案进行了技术经济比较后 ,推荐采用纯直流± 5 0 0～± 6 0 0kV送电方案。至华中送电落点考虑湖北、湖南、江西 3个落点 ,至华东考虑上海、浙江、安徽

The 'West power transmission to the east' of the middle passage in China is to transmit the hydropower generated from the Three Gorge, Sichuan province and stepped stations along Jinshajiang River to the regions of the middle and eastern China as well as Fujian province. The power supply from the Three Gorge covers 8 provinces and 1 municipality directly under the Central Government, including Shanghai, Zhejiang, Jiangsu, Anhui, Hunan, Hubei, Jiangxi, Henan and Guangdong. The hydropower from Sichuan province is characterized by rich exploitable resources and better adjustable properties, which are suitable for construction of large, middle and small sized hydraulic power stations. The Sichuan's power will be transmitted to the power networks of east China, middle China and Fujian and at same time to Chongqing and Guangdong also. The 'West power transmission to the east' of Jinsha River's power is realized by the hydropower generated from Xiluodu and Xiangjiaba Hydraulic Power Stations on the river, which will be absorbed within large regional networks and absorbed within provincial networks of the large regions. For the power delivery placement and mode in the transmission systems the technical and economical comparison has been executed according to direct current, alternating current and mixed DC and AC schemes, as a result, the DC ±500～±600 kV transmission scheme has been recommended. For the middle China 3 placements are considered in Hubei, Hunan and Jiangxi and 3 placements are considered in Shanghai, Zhejiang and Anhui for the east China.