“疆电入川”直流输电电压等级及导线截面选型

Selection of Voltage Class and Conductor Cross-section for HVDC Transmission Project from Xinjiang to Sichuan

采用加拿大Teshmont公司推荐公式和Kimbark.E.W推荐公式计算,并通过年费用分析法进行综合经济性比较,选择"疆电入川"直流输电电压等级为±1 100 kV。采用经济电流密度公式,计及电晕、电磁环境和可听噪声等约束,进行"疆电入川"直流输电导线截面选择。对选取导线进行线路经济性分析,并针对不同的线路长度、上网电价、计算年限变化进行敏感性分析,推荐导线截面为8×1 000 mm2。

By adopting the calculation formulae proposed by Teshmont Co. and Kimbark. E. W, and comparing their economical efficiency, the voltage class of HVDC transmission project from Xinjiang to Sichuan is determined to be ±1 100 kV. Using the formula of economic current density and considering the restrains of corona, electromagnetic cnvironmetat and audible noise, the cross - section of conductor is determined too. The economical efficiency of the adopted conductor is analyzed, the sensitivity analysis of the different line length, on - grid power tariffs and calculation period change is carried out, so the cross - section of eonductor is reeommended to he 8 × 1 1300 mm2.