Dsp-based Green Energy Grid Inverter System Design

Nowadays there is finite energy in the world because of excessive energy exploitation for a long time ,but economy isn't developed without energy ,so the energy problems are given attention to our society .In addition , because our entironment is badly destroyed by consumption of traditional energy .every country in the world are trying to find out a sustainable develop green energy .Our country has abundant green energy ,and it is potential to develop green energy generation .It makes for solving the problem of energy shortage in our country.This dissertation mainly studies the green energy grid-connected inverter system .At present, the green energy generation is mainly in the distributed generation system with low use rate.。But this dissertation suggests that green energy generation is connected to electric net, making it be supplement power supply. This dissertation proposes a practicality simulated environment, in the environment, different green energy can be simulated by using velometer, DC electromotor and dynamo. Then the green energy generation is connected to the electric net via inverter system. Besides, it has designed an inverter system which is used to connect the green energy to the electric net. Under this situation, this paper has designed a single phase bridge inverter circuit that has used the advanced power electronic parts(IGBT-IPM produced by MITSUBISHI ) and the double frequency SPWM control mode. This dissertation mainly research solar power generation, using the measure of current pre-estimative arithmetic and voltage double-loop control to improve the wave of output current and voltage ; using conductance differential arithmetic to realize the maximum power point trace (MPPT); using PLL to make the output current and voltage of electric net the same phase ;using the active voltage perturbation to detective and deal with islanding effect. In this system ,the whole system is controlled by COMS chip TMS320LF2407 produced by Tl whose working speed is fast and whose operating power is strong . It makes the whole system high intelligentize and the power of real time response .The system researched in this dissertation can achieve the request of capability target through by prophase designing and testing in practicality simulating condition .