Maximum Power Point Tracking without Current Sensor for Small Scale Photovoltaic Power system

This paper presents a maximum power point tracking without a current sensor for a small scale photo­voltaic power system. The small scale photovoltaic power systems are used in parallel, and so the cost and the relia­bility are strongly demanded. In the proposed inverter, the current is controlled with open loop, and then the power of photovoltaic array is calculated by the equation using the voltage of the photovoltaic array. Therefore, the system can obtain the power by detecting only the voltage of the photo­voltaic array. As a result, we may obtain the performance of the MPPT with a current sensor as well as with a current sensor.