Study Of Maximum Power Tracking For Photovoltaic Power System

A simple but robust maximum power point tracker is proposed. The maximum power point inherently becomes the global attractor of the system, ensuring optimum operation under transient and steady state conditions. The control algorithm is simulations and verified by experiments. The results confirm good tracking efficiency and rapid response to parameter changes."Solar Panel Maximum Power Point Tracker" . As the name implied, it is a photovoltaic system that uses the photovoltaic array as a source of electrical power supply and since every photovoltaic (PV) array has an optimum operating point, called the maximum power point, which varies depending on cell temperature, the isolation level and array voltage. A maximum power point tracker (MPPT) is needed to operate the PV array at its maximum power point.The design consists of a PV array, a 12-volts lead acid battery, DC_DC Boost converters (also known as step-up up converters) and a control section that uses the PC-7401. The control section obtains the information from the PV array through PC s Analog and Digital (A/D) ports and hence to perform the pulse width modulation (PWM) to the converter through its D/A ports.The Incremental Conductance (INC) and perturbation and observation (P&O) method is used to track the maximum power point of the PV array. The performance of the Incremental Conductance algorithm in tracking maximum power point is better than the Perturbation and Observation algorithm. By using Incremental Conductance algorithm the MPPT is able to track the maximum power point of the PV array quickly under rapidly changing in sun light intensity. While the Perturbation and Observation algorithm tends to deviate from the maximum power point under this condition.