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The operation of PV energy conversion systems near the maximum power point increases the output efficiency of PV arrays. Recently, a great number of techniques have been suggested for tracking the maximum power point (MPP). Maximum power point tracking (MPPT) is used in photovoltaic (PV) systems to maximize the photovoltaic array output power, regardless of the temperature and radiation conditions and of the load electrical characteristics the PV array output power is used to directly control the Pulse-Width Modulation (PWM), dc/dc converter, thereby reducing the complexity of the system. The resulting system has high efficiency with lower cost. This paper proposes modeling of a solar power plant under PWM control with a simple algorithm for photovoltaic (PV) power generation systems. The method is based on the use of a constant coefficient of short circuit current of the PV to obtain the maximum output power .Read less