摘要
超高压输电线周围电磁环境及其对人体的影响已成为人们普遍关心的问题之一。为此,在传统模拟电荷法计算工频电场强度的基础上,考虑到超高压输电线路在一定条件下产生电晕放电的实际现象,建立了一种基于此条件下工频电场计算的新模型。其中,利用高斯定理求解电场起晕时导线表面的电离电荷,将模拟电荷法引入到电晕放电产生的电离区内的电荷。最后根据用叠加原理得到电晕放电条件下超高压输电线产生的工频电场强度。通过对500kV超高压输电线路的仿真结果可知:由于电晕放电的影响,电场强度发生畸变且在时间上呈周期性分布,电晕放电对工频电场强度具有增强作用。220kV输电线路的仿真结果验证了该模型的合理性和正确性。
Based on the traditional charge simulation method （CSM）, a new model of calculation the power frequency electric field is established which take the corona discharge into account around the EHV （extra-high voltage） transmission lines in certain environment. The CSM is also introduced to the charge in ionization region which is produced by the corona discharge. The Gauss theorem can be used to solve the electrical field when the corona discharge is produced. And according the superposition principle, the power frequency electric field intensity under the EHV transmission lines due to the corona discharge can be obtained by added the value produced by the charge in ionization region to the value generated by the transmission lines themselves. The simulation results of 220 kV transmission lines proved that this model is reasonable and correct. Though the simulation results of 500 kV EHV transmission lines, it is known that because of the corona, the electrical field is distorted and the distribution cure is periodic variation in time domain. The corona discharge enhances the power electrical filed.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2009年第4期872-876,共5页
High Voltage Engineering
关键词
电晕放电
超高压输电线路
模拟电荷法
叠加原理
工频电场强度
电离
corona discharge
extra-high voltage （EHV） transmission line
charge simulation method （CSM）
superposition principle
power frequency electric field intensity
ionization
作者简介
郑亚利 1982-，女，博士生主要研究方向为电磁场数值计算、电磁兼容及环境保护 电话：（023）65112126 E—mail：yaya9304@163．com.
俞集辉 1944-，男，教授，博导 主要研究方向为电磁场数值仿真计算、电磁兼容及环境保护和系统信息管理 E-mail：yujihui@cqu．edu．cn
