摘要
由于同塔双回导线排列方式不同，其电磁环境影响相对于单回路情况既有改善的可能，也有增加的风险。为合理控制工程造价和环境影响水平，通过对前期科研成果和国内外电磁环境情况的调查。结合我国对750kV单回线路电磁环境参数控制值的研究，确定了750kV同塔双回线路电磁骚扰水平，使其不突破现有单回路水平。同时结合对330kV线路的测试，依据高海拔对线路电磁环境的影响，提出了同塔双回线路无线电干扰和可听噪声的海拔修正值。
Because of the different arrangement of the line conductors, the change of the EM effect of the two-circuits-on-same-tower may be in a dilemma： some parameters may be better, while others be worse. In order to save the investment of the project and mitigate its EM impact, the paper studied the prophase results and the investigations of EM impact in and out the country. Combining the results of single circuit 750 kV EM limits, the limits for the 750 kV two-circuits-on-same-tower lines were recommended, which was kept within the present ones. The paper also gave the measurements of 330kV lines, through which the effect of the altitude to the EM parameters was studied, and the altitude amendment of RF and AN were recommended.
作者
张广洲
路遥
万保权
邬雄
ZHANG Guang-zhou, LU Yao, WAN Bao-quan, WU Xiong （Wuhan High Voltage Research Institute of SGCC, Wuhan, 430074）
