Equipment Design for the Yunnan-Guangdong UHVDC Project

摘要

The Yunnan-Guangdong ±800 kV UHVDC (Ultra High Voltage Direct Current) Project iscurrently under construction. This link is the world's first HVDC project in the UHV rangeand one of the most important power links in Southern China. It will connect Chuxiong in theYunnan province to Suidong in the Guangdong province over a distance of 1418 kilometres.This project and its new technology present a major step forward in HVDC technology andprovide a new level of efficiency in power transmission.The increase of the transmission voltage level to 800 kV means high requirements on theequipment design. On the one hand side the increased dielectric stresses are to be covered byappropriate design of the insulation. Both, internal and external insulation are to be designedthoroughly. On the other hand increased dimensions of the main equipments lead tochallenges for manufacturing and transportation to site. This paper gives a brief introductionto the project and summarizes design aspects for the main equipment.