A Literature review on industrially accepted MPPT techniques for solar PV system

Abstract

Solar energy is a clean renewable energy and it is available around 89,000 TW on the earth surface. To get maximum power from a solar PV system with minimum power transfer loss is one of the main design objectives of an energy transferring network. Power electronic devices perform a very important character for an efficient PV power tracking system control and either incorporates to transfer the generated power to the ac/dc grid or battery storage system. In this case the duty of the power electronics devices used in PV system is to track maximum power point under different operating conditions of environment, so that power tracking efficiency of solar PV system can be improved. This paper encapsulates based the on performance comparisions on the behavior of MPP under uniform and nonuniform operating conditions and selects the optimum duty cycle for industrially accepted MPPT techniques with their algorithm.

Performance analysis of grid-tied photovoltaic system under varying weather condition and load

“…Some research studies on MPPT control methods have been reviewed. MPPT algorithms for PV system based on particle swarm optimization (PSO) were investigated in [18]; comparisons of results on maximum power point (MPP) behaviour under uniform and non-uniform operating conditions to select the optimal duty-cycle were simulated in [19]. Experimental implementation and simulation of a novel InCond MPPT variable step-size algorithm for the PV system were compared in [20].…”

“…The PV array MPP can be maintained at the maximum point by implementing an MPPT algorithm in PV systems, which optimizes the PV system energy yield. Incremental Conductance (InCond) MPPT algorithm was implemented in this study because it offers exceptional performance under rapidly changing weather conditions [19]. The MPPT controller observes the array output current and voltage to calculate the conductance and incremental conductance before deciding to raise or reduce the output of the converter duty ratio.…”

“…Besides, the voltage power derivative (dPpv/dVpv) is negative on the right of the MPP and positive on the left of the MPP. The theory of the InCond algorithm is expressed in (5) to (14) [19].…”

Estimating Efficiency of MPPT Techniques by Chattering Examination

“…Fig. 1 shows that at constant SR intensity (SRI), temperature and load condition, there is a unique operating point on the current-voltage curve (CVC) at which maximum power point (MPP) occurs [3]. However, with the variation in load SRI and temperature of the PV panel, the MPP changes on CVC [4].…”

“…The main problem associated with fixed duty cycle step size is that slow response, large computation and noisy with low step size and large oscillation around its MPP, less efficient with high step size. So instead of searching the entire region, initially decide tracking region [3], [2], then keep large step size of duty cycle at initial state and less step size in tracking region.…”