Investigation On Parallel Operation Of Inverter Modules

Now the mode of power supply converts into the distributed and intelligent from the centralized. The core is parallel technique of modules. The inverter parallel operation represents the characteristic of the AC power supply. Therefore, the paper focuses on the parallel operation of inverter.Many strategies are applied to inverter parallel operation. In short, it can be classified into two kinds: parallel operation of inverters with wire and parallel operation of inverters with wireless. The paper analyzes all kinds of parallel technique in details and points out the tendency of parallel operation of inverters. Finally parallel operation of inverters with no wire is adopted and researched in the paper.The performance of inverter operation will work on parallel operation of inverters. Inverter is full designed in the chapter 2. Math model of inverter is constructed and the parameters of filter and controller of inverter are designed in the same chapter. The parameters are rational with the MATLAB simulation.The key of parallel operation of inverters with wireless is such realization of power regulation as power calculation and regulation. To calculate the power exactly, power theory is full analyzed and some formulas of power calculation are achieved. The droop coefficients are adequately discussed in order to improve the regulation precision and dynamic response.The project is provided according to the aim of design. It shows that it is feasible through the PSIM simulation. Several issues on DSP are firstly discussed because the algorithmic is realized through DSP. Finally the flow chart of program is provided according to the algorithmic.To validate the previous project, a parallel system is constructed with two inverters. The result of experiments shows that it is more suited linearity load. But it will produce some errors when the system is connected to the nonlinearity. To resolve the problem, a new project based on current decomposed is brought forward. The PSIM simulation on the new project shows that it can reduce the error greatly. But it needs some experiment to confirm.