高压变电站工频电场计算方法分析

Calculation Methods of Power Fequency Electric Field for High Voltage Substation

针对模拟电荷法和边界元法的缺点,提出将两种方法结合起来计算高压变电站内工频电场分布。采用BEM计算变电站内开关设备表面电荷产生的电场,针对变电站内设备各部件的不同性质,分别推导接地金属支柱、介质分界面与悬浮导体的间接边界积分方程。采用CSM计算母线自由电荷产生的电场,完成工频电场分布。

In this paper,the charge simulation method （CSM） and the boundary element method （BEM） that are two ways to calculate the high-voltage substation＇ s industrial-frequency electric field are introduced.For these two methods have their own shortcomings, a new method is put forward which combines the CSM with the BEM. BEM is used to solve the electric field generated by the surface charge of the switchgear.As the various components have different nature, indirect boundary integral equation of the grounded metal pillar, the interface between media and suspended conductor are derived.Then CSM is used to solve the electric field generated by the bus.As a result the power frequency electric field distribution is completed which takes the influences of the critical equipment within the substation into consider.