【摘要】 1 000 kV特高压交流输电是中国目前电压等级最高的交流输电方式,其周围的电磁环境及其对人体的影响也成为人们日益关注的对象。笔者基于模拟电荷法,并考虑高等级电压会产生电晕放电这一情况,建立计算模型。仿真结果表明,电晕放电现象对地面工频电场有一定加强作用。结合实地测量,验证了该算法的正确性和有效性。最后仿真计算了特高压单回、双回输电线路的地面工频电场分布,研究了子导线半径、分裂间距、相间距、线路高度、输电线相序等参数改变时,地面电场强度的变化情况,提出了几种降低工频电场的方法。更多还原

【Abstract】 At present,UHV AC Transmission Line is the highest voltage AC transmission mode in China.The electromagnetic environment around the transmission lines and its influences on human body are the ones to which people pay attention increasingly.Based on the charge simulation method(CSM),the calculation of power frequency electric field is established which take the corona discharge into account around the UHV transmission lines.The calculation results show that the corona discharge enhances the power electrical field.The comparison between calculation and measurement proves that this method is correct and effective.Then,the power frequency electrical fields of single and double circuits are calculated,some factors which have influence on the electrical fields are discussed,and some ways to reduce electrical field are proposed.更多还原