Simulation and Implementation of High DC- DC Converter with 3-Phase PWM Inverter using a Single Photovoltaic Panel

To design a 3-phase 220V, 50Hz power source fed from only one photovoltaic panel of 250W, 29V and 8.6A is a difficult task. This means that, the DC output voltage of the DC-DC Push-Pull converter associated with this panel must be more than 537V at least to feed the inverter required to synthesize the 3-phase output voltage. This means that the panel DC voltage raised about (20 times), so, a high step-up voltage DC-DC converter with such a Photovoltaic (PV) system is required. Hence, the contribution of this work is the design, simulation and implementation of this converter, because it is the key point in such a system, while the 3-phase inverter is already known. The most important element in the practical implementation is the ferrite transformer, which has a special mode of operation according to its position in the converter circuit. This leads to use a special procedure in its design to produce the required output voltage, keeping the efficiency as high as possible. To track the maximum power point (MPPT) from the PV panel the microcontroller has been used for determine the suitable pulse width of the converter to keep the generated power at high as possible. The proposed converter will be reduce the effect of the shading problem by connecting all of the panels in parallel instead of the traditional series parallel method. A three-phase inverter simulated and implemented to transform the DC voltage from single photovoltaic panel to three-phase sinusoidal AC voltage source to feed three-phase balanced load. A microcontroller used to generate sinusoidal pule width modulation conduction mode for this purpose.