摘要
采用模拟电荷法计算输电线电场,若考虑输电杆塔影响,则需要在三维空间中计算输电线电场,此时若直接对输电线进行分段并计算电荷,由于输电线两端悬空,则会出现电荷聚集在输电线两端的问题,这与实际情况不符。此外,输电线受杆塔影响会导致电荷分布不均匀,使用模拟电荷法计算输电线电荷时需要更细的分段,计算量会迅速增加。为求解该场景下高压交流输电线路电场并提高计算效率,提出一种应用周期边界条件计算其空间电场的简化方法,可以消除输电线端部效应,减少待求未知数的数量,降低计算量。求解方程得到受杆塔影响下的输电线电荷和杆塔电荷,最后实现输电线在杆塔周围区域的电场计算。通过案例验证该方法的正确性。该计算方法适用于多档高压交流输电线路在输电杆塔周围电场的计算。
The electric field of transmission lines is calculated by the charge simulation method. Considering the influence of transmission tower, the electric field of transmission lines needs to be calculated in three-dimensional space. In this scenario, if the transmission lines are segmented and the charge is calculated directly, the charge will gather at both ends of the transmission lines because the two ends of the transmission lines are suspended, which is inconsistent with the actual situation. In addition, the transmission lines will be affected by the transmission tower, which will lead to the uneven distribution of the charge. When using the charge simulation method to calculate the charge of the transmission lines, it needs a finer segment, and the amount of calculation will increase rapidly. In order to solve the electric field of the high voltage AC transmission line in this scenario and improve the calculation efficiency, this paper proposes a simplified method to reduce the number of unknowns and the amount of calculation and to eliminate the end effect of transmission lines. The transmisstion lines change and the electric field around the tower are calculated by solving the equation matrix. The correctness of this method is verified by a case. This method can be used to calculate the electric field around the transmission tower of multi-level high voltage AC transmission lines.
作者
侯树政
田蔚光
邹军
刘培杰
HOU Shuzheng;TIAN Weiguang;ZOU Jun;LIU Peijie(State Key Lab of Control and Simulation of Power Systems and Generation Equipment,Department of Electrical Engineering,Tsinghua University,Beijing 100084,China;State Grid Economic and Technological Research Institute Co.,Ltd.,Beijing 102209,China)
出处
《南方电网技术》
CSCD
北大核心
2021年第10期39-45,共7页
Southern Power System Technology
基金
国家电网公司科技项目(5200-202156075A-0-0-00)。
关键词
模拟电荷法
周期边界
杆塔
输电线路
电场
charge simulation method
periodic boundary
transmission tower
transmission lines
electric field
