Study Of The Parallel Control Inverter System Based On DSP

This dissertation focuses on the research of parallel operation control system about modular inverter. On the basis of deep analysis of parallel operation theories and technology, a parallel operation control system about modular inverter is introduced for engineering practical project application. DSP (Digital Signal Processor) will be adopted in this system especially.First, the paper analyzes the principle of parallel inverter system and develops mathematical models about it. Circulating current characteristics of parallel system, distribution control of distortion power, and characteristics about closed loop regulation of voltage are also proposed. Comparison and analysis about the several styles of parallel controlling are given, which benefits the design and implement of parallel controlling system.A new style of inverter circuit and many mend methods are presented in the design aiming at improving dynamic and static capabilities of inverter. Because DSP and CAN (Controlling Area Net) are used in the design, a set of parallel operation control system based on distributed logic control is developed successfully. The strategy of control, the hardware design and control arithmetic are detailed. The experiments prove the availability of the design. Incidentally, the design not only adopts to parallel operation system on module inverter, but also refers to the distributed control system with DSP. A strategy of synchronization control, which combines competition coequality and priority, is mentioned firstly in the paper. This control style makes those parallel inverters of system synchronal well, and synchronizes the inverters and the city electricity. On the second thoughts this method not only reduces the degree of difficulty in control, but also advances the dependability and the implement possibility of system. Analysis results as well as experimentation ones are presented. Otherwise it takes full advantage of DSP into develop the efficiency of system.Finally the down to date theory and technology, which is about parallel operation controlling in the modular inverter system, is discussed superficiality.