Design Of Photovoltaic Grid-connected Inverter

With the development of social production, the demand of energy is increasing, and the energy crisis is becoming more and more prominent in the global scope. The fossil energy is limited, and it will be exhausted someday in the near future. The price of the fossil energy will be higher and higher with its reduction, and this will seriously restrict the development of production and the enhancement of people's living standard. Renewable energy is an important resource to meet the energy demand of the world, especially for China which has so many people. Solar energy resources are extremely rich in our country, and its application has very good prospect.Light volt incorporation net generating system can transform the solar energy into electricity energy through the solar cell board, and can change the Direct Current (DC) into Alternating Current (AC) which has the same frequency and phase with the city electricity through the incorporation inverse transformation, and can feed back to the electrical net. When the sunlight is sufficient, the electricity supplied by the solar energy can be used instead of the city net electricity; when the sunlight is not sufficient or the light volt electricity amount can not meet the demand, the control section can automatically adjust it, and the city net electricity can supplement. This system is mainly used for transmission line adjusting peak power plant and the rooftop light volt system.The core technology of the light volt incorporation system is incorporation inverse transformation. In this article the single-phase incorporation inversion hardware is constructed and designed. It provides the main circuit of the hardware and analyzes the functions of each part and chooses the DSP chip TMS320LF2407 of TI Company as the control CPU, and elaborates the characteristic of the chip and the reason of choosing it. It also makes a research in the control of incorporation inverse transformation software achievement.This article elaborates the maximum power rate track (MPPT) technology of light volt cell and provides the method of carrying out...