110 kV架空输电线路导线选型的环境效应探讨

选取经济输送容量大致相当的2种110 kV架空输电线路导线进行对比,计算了二者对周围工频电场、工频磁场和噪声的环境影响。结果表明:在采用相同杆塔的情况下,双分裂导线周围的电场强度显著高于单根导线;双分裂导线和单根导线周围的工频磁场强度基本一致;双分裂导线产生的噪声高于单根导线2 dB左右,这一差别相对于背景噪声来说基本可以忽略;在电压和输送电流相同的条件下,单根导线LGJ-500/45比双分裂导线2×JL/G1A-240/30对环境的影响更小。

Discussion on environmental effects of wire selection of 110 kV overhead transmission lines

Through a comparision between two types of 110 kV overhead transmission line wires with roughly equivalent economical transmission capacity,their environmental impact on the surrounding power frequency electric field,power frequency magnetic field and noise were analyzed.The results showed that the electric field strengrth around twin bundle conductors was obviously higher than that of single conductor with the same towers.The power frequency magnetic field intensity around the twin bundle conductors and the single conductor was basically identical with the same towers.The noise generated by twin bundle conductors was about 2 dB higher than that of single conductor,but this little difference was negligible comparing to background noise.Moreover,the effect of single conductor(LGJ-500/45)on the environment was less than that of twin bundle conductors(2×JL/G1A-240/30)with the same voltage and delivery current.