逆变器无线并联系统的建模与仿真

Modeling and Simulation of Parallel Inverter System without Control Interconnection

分析了逆变器无线并联控制技术的基本原理,并介绍了离散化的功率计算方法,在此基础上采用MATLAB/Simulink建立了逆变器并联系统的仿真模型,说明了仿真模系统中模块间的关系。按照功率在数字信号处理器(DSP)中的求取方法,建立了计算频率可变的逆变器模块输出有功功率和无功功率模型,通过此功率模型在无线并联系统中的应用,验证了所建模型的正确性。该功率计算模型可以推广到其它类似场合。

The operational principle of the parallel inverters system without control interconnection was described and the discretization method of power calculation was introduced. The simulation model of the parallel system, which is composed of five subsystem models, was constructed using MATLAB/Simulink deriving from the analysis. The relationship of the five subsystem models was explained. The active power and reactive power subsystem model of the inverter unit were established according to the method used in digital signal processor （DSP）. The simulation result can be attained by adding the active power and reactive power model to the parallel inverters system, which can validate that the constructed model is correct. Therefore, this active power and reactive power subsystem model can be extended to other occasion where it needs to calculate the power of the frequency conversion signal.