SOLAR POWERED DC HOME WITH MPPT& INTEGRATING VOLTAGE CONTROL
Abstract : The increase in consumption of low power DC appliances in home, accounts to high AC-DC conversion loss. The solar source is inherently a DC source which mainly provides the supply for DC home with low power DC appliances. This paper presents a DC Home model powered by solar source integrated with conventional backup. The power backup is provided by the integration of the AC supply and a battery where AC Supply is treated as secondary source and the battery is treated as tertiary source. The output of solar panel is fed to the DC home through an efficient Flyback converter with power control which is achieved by implementing incremental conductance algorithm in it. The voltage control is implemented by Inverting buck boost converter with closed loop integrating control in order to provide a desired voltage to the DC appliances. In the proposed system, flyback converter controls the power and the inverting buck boost converter controls the output voltage to the load. The proposed model is simulated using MATLAB Simulink and the results convey that the model maintains the desired power and voltage for the DC home.
? The PV solar systems exist in many different configurations with regard to their connections with inverter systems, external grid, battery bank, or other electrical loads.
? In that ,existing system has a new solar power generation system. The solar power generation system is composed a dc-dc power converter and a seven level inverter The seven level inverter contains only six power electronics switches.
? This switch is switched at high frequency at any time to generate the seven level output voltage, the switching losses is reduced, and the power efficiency is improved.
? The extensive use of fossil fuel has resulted in the global problem of greenhouse emissions.
? Solar energy is not available at night, storing its energy is an important issue in order to have continuous energy availability.
? Electrical circuits can be designed to present arbitrary loads to the photovoltaic modules and then convert the voltage, current, or frequency to suit other devices or systems, and MPPT solves the problem of choosing the best load to be presented to the PV system in order to get the most usable power out.
• This paper proposes a MPPT controller based solar power generation system, which consist of dc/dc converter and a new nine-level inverter.
• The input voltage of the solar panel is dc and it takes the dc input from the solar panel. The dc-dc boost converter boost up the input voltage and gives to the multilevel inverter.
• This paper proposes a solar power generation system to convert the dc energy generated by a solar cell array into ac energy that is fed into the utility.
? The switching operation for a multilevel inverter is in order to improve power conversion efficiency. In theory multilevel inverter should be designed with higher voltage levels in order to improve the conversion efficiency and reduce harmonic content and electromagnetic interface.
? This switch is switched at high frequency at any time to generate the seven level output voltage, the switching losses is reduced, and the power efficiency is improved.
? The advantage of multilevel inverter is very small output voltage, results in higher output quality and lower switching losses.
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