| Parallel operation of multi-inverters can achieve huge capability and redundancy power supply. It also improves the power supply agility and stability, parallel-inverter system with control interconnections and parallel-inverter system without control interconnections, the latter is more flexible and easier to expand, it is studied more and more nowadays.This paper focus on the parallel inverters without control interconnections, firstly introdues the control tactics and connection in parallel method of inverter, constructs the model of inverter, and minutely introduces the disign of LC output filter, further analyse and computes the parameters; and designs the each step of voltage and electric current hexagon control inverter, and the inverter is rational with the MATLAB simulation.The principle of power distribution was analyzed and the function to control the output power was presented. Emphasize derivative the PQ droop arithmetic, and put forward optimization droop arithmetic function, then setup the parameters.With establishing and analyzing the simulation model of single wireless parallel inverter system by MATLAB, which tested the right of the controll scheme was put forward and the parameters was designed. The system has good effect of current share, and both dynamic and steady performances of the system are good. |
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