Optimized Design Of Wireless Parallel Inverters

With the development of society more swift, the power requirements are alsogradually improved. Wireless parallel inverter can improve its power, and volume ofthe power is reduced. Parallel inverters not only reduce cost, but also improve theutilization rate. Power inverter modular parallel is a useful method towards thedevelopment of high-power.Wireless parallel inverter power is researched and analyzed in this paper. In therectifier circuit, visualization algorithm optimized design is used in the design of filterinductor in order to reduce the volume based on the inductance. In the parallelinverter circuit, the virtual impedance is used to improve the accuracy of currentsharing which largely improve the circulation. It is verified by simulation.For the parallel inverter system, firstly, rectifier circuit and inverter circuit isanalyzed detailed in this paper. Rectifier circuit uses three-phase uncontrolled rectifiercircuit, the inductance of the DC filter circuit is designed in visualization algorithm,compare with the theoretical calculations design, its size has been effectively reduced.The inverter circuits using double loop control, the inner uses the capacitor currentfeedback which considering the accuracy of the output voltage. Parallel inverterpower system uses the droop control strategy to make the phase-coherent with theoutput voltage, by adjusting the output active power in the situation of the output isinductance and adjust the output reactive power to make the same voltage amplitudewith voltage.The output impedance of the parallel inverter system is designed according to thecontrol parameters to determine its value, usually the line resistance is ignored and itis regarded as pure inductive output impedance which will affect the output currentdistortion factor for nonlinear loads, this paper presents virtual impedance controlcircuit, to improve the accuracy of current sharing. The rationality of the controlstrategies is verified by the simulation of MATLAB software. The feasibility of theparallel inverter system is verified by building two power inverter platform4KVA.