Modeling method for power electronic system based on Hamilton principle of analytical mechanics

Traditional modeling method for power electronic system is limited in application and strictly depends on system topology structure. Therefore, utilizing the analogical relation of physical quantities between mechanical system and power electronic system, this paper presents a modeling method based on Hamilton principle of analytical mechanics for power electronic system. The method is not only more systematic, but also has clear physical concept and wide application range towards the above disadvantages existing in the traditional modeling method. Meanwhile, the paper illustrates this modeling procedure, taking three-phase voltage-source PWM rectifier which has wide application in the power electronic field as an example. Moreover, design method of power electronic system controller based on Hamilton principle is presented and has been experimentally verified for PWM rectifier since it is convenient to design the system controller in terms of energy using the Hamilton modeling method. Simulation experiment results show that the designed PWM rectifier control system has better steady and dynamic performance.