【摘要】 针对交流特高压输电线路,采用模态转换方法得到了电晕电流注入线路后的分布情况,然后对沿线电流元辐射场强进行积分叠加,得到了沿线某点的无线电干扰情况,对影响无线电干扰强度的因素和干扰特性进行了分析。计算结果表明,线路平均高度的增加、相间距离的增加以及导线分裂数的增加都会使被干扰点的无线电干扰水平减小,而且此时磁场干扰占据优势。本文的结论为交流特高压输电线路无线电干扰的抑制、测量和防护提供了参考依据。更多还原

【Abstract】 Injecting corona current into ultra high voltage AC (UHVAC) transmission line, the distribution of corona current along the transmission line is obtained by use of modal transformation method. Using integral superposition of radiation field intensity produced by current elements along transmission line, the radio interference circumstance at a certain point in transmission line is achieved, and the factors impacting the radio interference intensity and their interference characteristics are analyzed. Calculation results show that along with the increase of average height of transmission line, phase spacing and number of sub-conductors the radio interference level at the interfered point will be relieved, meanwhile the magnetic field interference is the principal interfering factor. This conclusion is available for reference in the elimination, measurement and prevention of radio interference caused by UHVAC transmission lines.更多还原