直流电压等级序列的经济比较

Economic Comparison of HVDC Voltage Class Sequence

提出了对±1000、±800、±660和±500kV直流输电电压等级的单位到网容量经济指标进行比较研究的方法,分析了不同电压等级直流输电的经济规律,测算了不同电压等级直流输电技术的经济输电距离,结果表明:±500kV直流输电技术的经济输电距离小于1100km,±660kV直流输电技术的经济输电距离为900～1700km,±800kV直流输电技术的经济输电距离为1200～2700km,±1000kV直流输电技术的经济输电距离在1800km以上。文中的内容对于实现我国远距离大容量直流输电技术的标准化、发挥规模效益、使电网节能降耗等具有重要意义,对类似的研究工作也具有参考价值。

A method for comparative research on unit capacity transmitted upwards to main power grid from ±1000 kV, ±800 kV, ±660 kV and ±500 kV HVDC systems respectively is proposed. The economic laws of HVDC systems in different voltage class are analyzed, and the economic power transmission distances of HVDC power transmission technologies for different voltage classes are estimated and calculated. Calculation results show that the economic power transmission distance of ±500 kV HVDC system is less than 1100 km, the economic power transmission distance of ±660 kV HVDC system is within the range from 900km to 1700 km, the economic power transmission distance of ±800 kV HVDC system is within the range from 1200km to 2700 km, and that of ±1000 kV HVDC system is farther than 1800 km. The content of this paper is significant in the standardization of long distance high capacity HVDC power transmission technology in China and the exertion of scale benefit as well as energy saving and consumption reduction in power grids, and is available for reference in similar researches.