新二元模型结构在电力电子电路仿真中的应用

Application of New Binary Model Structure in Power Electronic Circuits Simulation

提出了用数字计算机对电力电子电路进行仿真的一种新的方法。半导体开关被描述成一种二元电感模型，在它导通期间，其电感值很小；而在它截止期间，其电感值为无穷大。本文中给出了如何确定此小电感值的方法。采用改进的节点法来建立方程，再利用ＢａｃｋｗａｒｄＥｕｌｅｒ积分方法来求解以确保其收敛性。该方法能有效地监控开关的状态，拓扑结构的变化通过最少量的计算予以解决。

This paper presents a new simulation method for power electronic circuits through the uses of a digital computer. Semiconductor switches are described as binary inductor models, with very low values of inductance during conduction and infinite values of inductance in other case. Also, in the paper, an approach to determine these low values of inductance is presented. The equations are established with modified nodal method, then Backward Euler integration method is employed for the solution of equations to ensure its convergence. With this method, the status of switches can be monitored efficiently, and the changes of topology structure are solved with least amount of computation. In addition, a simulation example is given,with its waveforms presented.