【摘要】 利用EMTP以实际工程中同塔双回路220 kV线路在不同段分别与特高压1 000 kV和超高压500 kV线路同塔混压四回线路为模型,对不同工况下输电线路的电流不平衡度进行了研究,以便得到同塔四回线路合适的相序排列方式。仿真结果表明:当系统中同时存在1 000 kV/220 kV和500 kV/220 k V同塔四回路布置时,在1 000 kV线路和500 kV线路不同运行工况下220 kV线路的电流不平衡度会受到一定的影响,且500 kV输电线路的电流不平衡度也会受到不同运行方式下1 000 kV输电线路的感应影响。根据对220 kV导线不同相序布置方式下线路电流不平衡度的计算,推荐同塔双回路220 kV线路采用逆相序布置方式。更多还原

【Abstract】 The current unbalanced factor of quadruple-circuit transmission lines with 1 000 kV/220 kV and 500 kV/220 k V on the same tower is simulated by Electromagnetic Transient Program(EMTP). The simulation results demonstrate that the current unbalanced factor of 220 kV transmission lines is influenced by the service conditions of 1 000 kV and 500 kV lines, and that of 500 k V transmission lines is also affected by 1 000 kV transmission lines under different operating conditions. Based on the calculation of the current unbalanced factor of 220 kV lines in different phase sequence arrangement, the reverse phase sequence arrangement of double-circuit 220 kV lines is recommended.更多还原