溪洛渡直流工程同杆双回线路电磁环境指标研究

同杆双回直流线路的电磁环境指标比起单回直流线路要复杂得多。文章根据溪洛渡直流工程选定的导线截面参数(4×900分裂导线)和运行电压(±500 kV),研究了同杆双回直流线路在不同极导线排列方式下各项电磁环境指标的变化规律。结果表明,由于导线截面较大,该工程线路无论采用何种极导线排列方式均能满足电磁环境限值要求,因此,电磁环境指标不是决定该工程极导线布置方式的决定性因素。

Study on the Electromagnetic Environment Index of DoubleCircuit Transmission Lines on the Same Tower in Xiluodu HVDC Project

The electromagnetic environment of doublecircuit HVDC transmission line is more complex than that of the singlecircuit one. According to the conductor parameters, which are of the 4 × 900 conductor, and the operation voltage of ±500 kV selected for Xiluodu HVDC project, this paper calculates the electromagnetic environment index of the line under the conditions of various poleline arrangements on the same tower. The results show that the doublecircuit transmission lines could meet the electromagneticlimitvalue requirement under each poleline arrangement as the selected conductor has a cross section large enough. Therefore, the electromagnetic environmnet index is not a decisive factor for the poleline arrangement of the project.