摘要
提出一种计算高压直流输电线路地面电场和电晕损耗的简单方法。从电晕建立的过程确定空间电荷。电晕情况下,认为导线对地电压由导线上电荷产生的电压和空间电荷产生的电压两部分构成。当导线电压超过起晕电压时,令一定量的电荷从导线表面发射到空间,并在电场作用下背离导线,当超出一定范围后即认为电荷消失。考虑空间电荷重新计算导线电压,并每隔一段时间重复上述行为,直到导线每次发射的电荷不变、电晕达到稳定状态时停止计算。通过对比分析,验证了所提方法的正确性。
A simple method for calculating the ground electric field and corona loss of HVDC power line is proposed. The space charge is determined during the establishment of corona. When there is corona,the wire-to-ground voltage is composed of the voltage generated by the line charge and the voltage generated by the space charge. When the line voltage exceeds the inception voltage,a certain amount of charge is launched away from wire surface into space by the electric field. It is considered as disappeared when it is beyond a certain distance from wire. Considering the space charge,re-calculate the line voltage cyclically until the emission charge is constant and the corona reaches steady state. Comparison verifies its correctness.
出处
《电力自动化设备》
EI
CSCD
北大核心
2012年第12期6-9,27,共5页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(50907075)~~
关键词
高压直流输电
发射电荷
电场
电晕损耗
模拟电荷法
HVDC power transmission
emission charge
electric fields
corona loss
charge simulationmethod
