Study On Control Technology Of The Grid-Side Converter Based On DSP

In recent years, the lack of energy has become a hot topic of discussion in various countries, and causes the national attention. In the face of non-renewable fossil energy depletion, the development and utilization of new energy sources has become an inevitable trend of social development. The use of solar power and wind power generation is the most typical applications for new energy sources, and the grid-side converter is the middle of the bridge between power and new energy, so the grid-side converter research is very important, which has become the current hot topic. This paper will be study on the grid-side converter control technology.First, this paper studies the topology of the main circuit of three-phase voltage grid-side converter, introduces mathematical model of the grid-side converter and analyzes control strategy, working principle and choice and design of the main circuit parameters. It deals with the design of control system of the grid-side converter based on DSP from the aspects of control circuit, measuring circuit, driving circuit, main circuit and software design.Second, the simulation model of controlled rectifier and active inverter of the grid-side converter is established. Using SPWM control technology and dynamic hysteresis control technology carries out experiment simulation of controlled rectifier and active inverter. The advantages and disadvantages of the two kinds of control technology is obtained by simulation, which proves the feasibility of the scheme.Finally, considering TMS320LF2407A chip of TI company as the control core, the main circuit of experiment system of the grid-side converter is built. Control circuit driving circuit and measuring circuit of the system is designed. The experiment of the inverter is done in the experiment platform. The simulation and experiment show the control system structure is reasonable which proves the feasibility of the scheme.