±500kV等级3200MW直流运行电压优化  

Optimum of Operating Voltage for ±500 kV/3200 MW DC Transmission

作　　者：伍文城 余波 周德才 王彦峰[2] 

机构地区：[1]西南电力设计院,成都市610021 [2]广东省电力设计研究院,广州市510663

出　　处：《电力建设》2011年第6期39-45,共7页Electric Power Construction

摘　　要：为节约输电线路走廊,我国建设的中短距离（800-1 300km）范围内的直流输电工程常常采用双回±500kV直流同塔并架输电方式,并且单回输电容量从3 000MW提高到了3 200MW,相应带来了损耗增加、换流阀的设计难度提高等问题。基于溪洛渡右岸送电广东直流工程实例,对3200MW容量直流输电工程的电压等级从±500kV提高到±535或±550kV进行研究,分析了3个电压等级的设置分别对直流主回路参数、绝缘配合、主设备、直流线路设计、损耗以及投资带来的影响。最后通过技术经济的综合比较,提出了优化的电压等级。Considering that the space for line installation is not enough,DC transmission projects for mid-and short-distance（800~1 300 km） in China recently are designed to be contrusted by±500 kV double circuits on the same tower,and the transmission capacity of single circuit is rasied from 3 000 MW to 3 200 MW,which lead to the increased loss,and more difficulty in the converter valve design etc.Aiming at the DC transmission project from Xiluodu to Guangdong,the feasiblity of the voltage raised from ±500 kV to ±535 kV or ±550 kV is studied,and the effects of three voltages are analyized on main circuit parameters,insulation coordination,main equipments,DC line design,loss and investment.As a result,the optimized operating voltage is given by a comprehensively technological and economic comparison.

关 键 词：直流输电 运行电压 电压优化 电压等级 技术经济分析 

分 类 号：TM721.1[电气工程—电力系统及自动化]