Introduction to Maximum Power Point Tracking For Photo Voltaic Systems Seminar Topic:

The proposed algorithm is to track maximum power point in photo voltaic array which is used as a reference point in control systems. Photo voltaic arrays are used in renewable energy sources like solar panels and they do not transmit a constant power  supply due to suns irradiation and varying cell temperature. So by tracking the maximum power point we can supply maximum power to the load. In this paper we will see how the algorithm tracks the maximum power point and the advantages of using this compared to other algorithms.

Brief on power tracking algorithm:

By using this algorithm we can calculate the maximum power and also we can control the direct current which is drawn from photo voltaic arrays. The solar cells act as semiconductors when exposed to sunlight generate a dc current but the current varies with the irradiation of suns light. Maximum power point tracking method follows a fractional open circuit and short circuit current measuring technique for calculating the maximum power.

By using this we compute the maximum power and the value is set to zero initially and after the tracking of the actual current it compares the difference between the maximum power and then increment or decrements it accordingly and give the input to the controller by using hysteresis band. In this algorithm the maximum power is calculated and compared with the actual value based on the computed value the extracted power from the photo voltaic arrays is controlled.

Conclusions:

The advantage of using this algorithm is that it draws the current directly from the photo voltaic arrays. This algorithm has high convergence speed and does not depend upon the characteristics of the photo voltaic arrays. This algorithm has high tracking efficiency compared to other techniques and we can make the controller on and off based on the hysteresis band.

Download  Maximum Power Point Tracking For Photo Voltaic Systems ECE and EEE Seminar Report.