Design of optimum Maximum Power Point Tracking algorithm for solar panel

It is important to track the maximum power point of the Photovoltaic panel, as the electrical power supplied by solar array depends on insolation, temperature and load. Maximum Power Point Tracking (MPPT) is an Power electronic system that operates the photovoltaic modules to produce maximum power. MPPT varies the electrical operating point of the modules and enables them to deliver maximum available power. Normally Pulse width modulation type dc to dc conveters are used as the impedence matching between the PV arrays and loads. A new modified perturb and observation MPPT control algorithm is proposed to track the maximum power point. Unlike the control of PV voltage or current in normal P&O method the duty ratio of the dc to dc boost converter is directly controlled in the proposed algorithm. The proposed MPPT has the advantages of simplicity and high convergence speed. The algorithm is tested under various operating conditions. The obtained results have proven that the MPP is tracked even under sudden change of irradiation and loading level.