《电力勘测设计》杂志社有限公司

由于输电线路走廊资源的紧缺,特高压直流(ultra-high voltage direct current, UHVDC)线路平行架设,共用走廊的情况已不可避免。对于同走廊架设的特高压直流线路,在工程设计和建设中,如何控制线路电磁环境及电气间隙,在确保施工和运行安全可靠的前提下,减少线路走廊宽度,具有重大意义。本文通过分析采用JL1/G3A-1250/70导线的双回±800 kV直流线路并行时的影响因素,包括线路参数、杆塔布置方式、电磁环境、电气距离等,选取典型杆塔条件,计算在不同的并行方式下,线路所需最小水平距离。

Due to the shortage of the transmission line corridor resources, the circumstances of the UHVDC lines erect in parallel and shared corridor is inevitable. For UHVDC lines erected in the same corridor, it is major significance of how to control the electromagnetic environment and electrical clearance of the line can reduce the width of the line corridor under the premise of ensuring the safety and reliability of the construction and operation in the engineering design and construction. This article will compute line minimum horizontal distance in different parallel ways, through analyze double-circuit parallel ±800 kV DC line influencing factors with JL1/G3 A-1250/70 conductor wire, including line parameters, tower layout, electromagnetic environment, electrical clearance to select the typical tower condition.