云广±800 kV直流工程输电容量探讨

摘要： 在特高压直流输电工程设计时，额定输送功率的确定是一个十分重要的问题。对±800 kV云广特高压直流输电工程的6 000 MW、5 500 MW、5 000 MW、4 800 MW等4种输电规模的技术参数进行了比较，并讨论了这4种方案的经济性及其对系统安全稳定的影响，在此基础上推荐5 000 MW 为该工程的输电容量。

关键词 ：特高压直流；输电容量；技术参数；稳定极限

Discussion on transmission capacity of
Yunnan-Guangdong ±800 kV UHVDC project
WU Wen-cheng1, LI Xin1, DING Jun1, ZHENG Yong1, ZHONG Jie-feng2

Abstract: It is very important to determine the transmission capacity of a UHVDC project at its design stage. For the ±800 kV Yun-Guang UHVDC project, there are four capacity schemes to choose, i.e. 6 000 MW, 5 500 MW, 5 000 MW and 4 800 MW. Comparisons of the four schemes in their technology parameters, and discussion of their economic benefits and impacts on the system stability are carried out, which results in a conclusion that the capacity of 5 000 MW is recommendable to the project.

　Keywords: ultra high voltage direct current; transmission capacity; technology parameter; stability limit