Research On Household-type Roof Photovoltaic System

With the energy shortage, the demand for new energy is becoming more and more urgent. Therefore, access to new energy is one of the key areas of current research. In this paper, in order to get new energy as the starting point, designed a kind of available and meet the photovoltaic power generation system of household energy demand.According to the analysis of the solar cell, not a constant power output of solar battery has been. Analysis of the principle of maximum power point tracking, selects the Boost circuit as the main circuit. Comparison of power feedback method, the constant voltage method and incremental conductance method, perturbation and observation method, finally chose the perturbation and observation method, control strategy, simulation.Secondly, based on the light efficiency and energy saving requirements choose LED as the light source of the family. According to the requirements of the driving source, a DC/DC chopper circuit design. Chopper circuit with output voltage of MPPT circuit for input, the output voltage is DC output 12 V.Then, according to the requirements of grid voltage control method, compared with the current control method, the control method of current control effect is better. In the control strategy of the voltage and current dual loop control strategy for the grid connected inverter. In solar power, in order to ensure that the LED lighting power supply, the power input from the public power grid, the design of the output for the DC 12 V.