摘要
电力电子级联系统是由不同类型的电力电子变换器构成的复杂系统,其负载主要分为恒电压和恒功率负载。本文通过直流分布式电源系统的阻抗比较法,以电动汽车动力系统为例分析了由恒功率负载引起的不稳定性,给出了系统稳定条件。不满足上述条件时,给出了一种混合负载的非线性控制方法,控制效果用 simulink 仿真进行验证。
Power electronic cascaded system are complex systems integrated with different power electronic converters. In general, there are two kinds of loads in these systems, constant power loads and constant voltage loads. The potential instability effected by constant power loads is analysed with a automotive power system as an example by impedance ratio criterion. The stability qualifications are given in this paper. Furthermore, a nonlinear control method is described to stable the systems with mixed loads. The control method＇s effects are proved by simulations and experiments.
出处
《电气自动化》
北大核心
2006年第2期13-16,共4页
Electrical Automation
关键词
级联系统
恒功率负载
阻抗比较法
单周期控制
cascaded system
constant power load
impedance ratio criterion
one duty-circle control
