Study Of Inverter Parallel System Based On Distributed Control

DC-AC inverter power source is able to change in the exchange of electrical energy converter device, mainly for the exchange of load-sharing power, or power grid. With modern power electronics technology progressing, the application of inverter technology are increasingly being used, the inverter power supply requirements have become more sophisticated, so enhancing the capacity and stability of the inverter has become an important issue, the main method to solve this problem is inverter parallel. In this paper, individual control of SPWM inverter and its parallel operation technique has been studied in order to get good performance of the inverter system.In this paper, a single structural performance SPWM inverter has been studied at fitst,because it will affect the pros and cons of the parallel inverter system,so detailed study and comparison of various control methods and determine a single inverter modules feature an inner capacity current and outside voltage feedback control system , then analyze and selecte the parameters, last but not laste, the simulution of design of the power was carried out by useing MATLAB.The results showed that the control strategy has good dynamic and steady-state performance, and can guarantee the g ood functioning of the individual modules.The principles and mathematical models of inverter parallel system was analyzed, the SPWM inverter in parallel circulation features and power characteristics was researched in detail, the current load sharing strategy and a systematic comparison was analyzed.Finally the principle of distributed control method and design the parallel system was introducted, in the two inverters connected in parallel system based on distributed control strategy ,the simultaneous use of two phase-locked control strategies and the load sharing use of the Active and Reactive Power control strategy, a system simulation model and simulation was established,it proved that the use of distributed control method can achieve the parallel inverter system, the normal operation, which can effectively restrain the system, circulation, and the dynamic performance of the system very well, but also well adapt to the load disturbance, the feasibility and superiority of the parallel inverter control system was embodied in the distributed control way.