摘要
在直流输电线路工程设计中,如果按我国现行标准规定的经济电流密度选择导线截面,将导致截面偏小,损耗增大。实际上,直流输电线路的经济电流密度取值应根据工程造价、电能成本及工程特点等因素分析确定。通过对我国±500 kV直流线路工程不同导线截面的工程经济性分析和评估,并依托西北(宁东)—华北(山东)±660 kV同塔双回直流工程,证明适当增大导线截面,对节能降耗、建设"资源节约型、环境友好型"电网具有十分重要的意义。
In DC transmission line construction design, current national standard of economical current density will under predictcd conductor section, resulting in large loss. In fact, the economical current density of DC transmission lines should be based on factors, such as project cost, electric power cost, and characters of the project, etc. Through evaluating and analyzing of the economy of the conductor section of the nation＇s ±500 kV DC line projects, and using Northwest （Ningdong）-North China （Shandong） ±600 kV double circuit DC project as an example, the significance ofadequately increasing conductor section to energy conservation and consumption reduction, and building an energy conserved and environmental friendly grid is clarified.
出处
《电力建设》
2008年第5期13-16,共4页
Electric Power Construction
关键词
直流输电线路
导线截面
选择
工程经济性
DC transmission line
conductor section
selection
economy of the project
