Research On Maximum Power Tracking And Grid Connection Control Of Photovoltaic Power Generation System

At present, with the extensive use of energy, depletion of non-renewable energy is also a wake-up call for us. So how to actively develop new energy is imminent, the solar energy is everywhere in our daily life, it not only rich in storage, and clean, how to better use of new technology will be the role of new energy to the maximum, the use of solar energy to build a smart grid becomes especially; But due to the solar energy is a natural resource, are greatly influenced by environmental factors, the strength of the light, temperature, and will have great influence on the photovoltaic array. And maximum power tracking is a good way to solve this problem, the following will conduct in-depth research to maximum power tracking.The light intensity of the sun all the time in change, in order to make the photovoltaic system is able to maximize the absorption of solar energy, which requires a maximum power tracking to monitor light intensity. So as to make the absorption of energy to achieve the best photovoltaic system, according to the change of the solar energy to adjust the state of the absorption, and then through the grid inverter to the grid.This paper studies the 3 kw double branch maximum power tracking of photovoltaic(pv) grid system, including the selection of photovoltaic array MPPT are independent of each other, make full use of the energy, to increase the conversion rate of the system, and then are simulated. Finally system USES digital signal processor TMS320F2812 as the control chip, implement the digital control scheme, and set up the experimental platform, has reached the level before double branch realize MPPT experiments respectively, in the double loop control method under the action of stable before and after two stage, and the effective realization of interconnection.Both in theory and simulation show that the designed multidrop maximum power tracking of photovoltaic(pv) grid type scheme has certain feasibility and practicability of the circuit, but also has a certain application prospects.