多支路并联型空心电抗器电感的场-路耦合计算方法

Inductance calculation of air core reactor by coupled electromagnetic-circuit method

电力系统中的空心电抗器一般采用多支路并联形式,且电抗器的包封间设计有通风道,采用传统的方法难以精确计算电抗器的电感.建立了该电抗器的精细模型,采用电磁场的有限元法与电路方程耦合的计算方法,研究了通过电抗器的总电流在各层并联支路间的分配,进而计算出了电抗器的自感及电抗器间的互感.将计算值与实测值进行了对比,结果表明该计算方法具有很高的计算精度.

The reactor,which is used in the power system,is usually constituted by several parallel coils;and there are air path between the coils,which are used for heat conduction.It is inconvenience to calculate the inductance using the conventional methods.This paper presents a coupled electromagnetic-circuit method to calculate the distribution of currents in each coil.The self-inductance and mutual inductance are calculated with the initial data from previously calculation.The calculated inductances are compared with the experimental results.The numerical results are in good agreement with the experimental results;and the proposed method has fair accuracy.