The Research Of Control Strategy Of The Photovoltaic Energy System Used In Households

At present, the energy crisis and environmental pollution in the global scope are compelling major subject, so many countries in the world are finding a kind of green energy method which can solve the energy reserves problem and can't bring environmental pollution. As the important component members of the new energy, the solar energy's biggest characteristic is never dried up and no pollution. In recent years,with the attention of all parties, the solar energy develop rapidly whose the main power form is photovoltaic (pv) grid generation. Many data shows that the near future solar comprehensively will become the most major energy channels in the life.Now, the subject on the solar energy utilization rate is not high,then cause the use of higher cost and not popularization. Based on it, the paper gives a fuzzy logic control theory by the MATLAB fuzzy logic control box which design three-dimensional and two-dimensional fuzzy logic controller, and using simulink for photovoltaic maximum power point tracking is simulated. Through comparing the MPPT simulation results in the differences of stability, accuracy and quickening, and then analyze the causes, and to the most possible improvement of solar energy utilization.This paper gave the Boost type DC-DC converter working principle, in the scope of the system requirements on voltage stability, the author have simulated and the output meets the requirement. It also gave single-phase photovoltaic inverter and working principle of the control strategy, and simulation, the output of sinusoidal alternating voltage yielded is good results. This paper introduces the control PI in spect of the software, then adjust control are introduced and phase lock loop control technology, and applied the inverter circuits, make the interconnection of electric current and voltage with frequency with phase.Finally, through MATLAB/simulink to the whole system is simulated, the design completed based on DSP TMS320F2812 of photovoltaic (pv) grid power system, and the simulation results accord with the requirement. Meanwhile developed photovoltaic system controller, and makes a preliminary experiment.