Impact of partial shading on the output power of PV systems under partial shading conditions

Abstract

A major challenge in the photovoltaics (PV) systems is to make it energy efficient. Partial shading reduces the energy yield of PV systems and introduces multiple peaks in the P-V characteristics. The maximum power point trackers (MPPTs) work in conjunction with the boost converter and track the global peak in the P-V characteristics. The boost converter used for MPPT is generally designed to operate with high efficiency at the maximum power point (MPP) voltage of the array by assuming a single peak power point on the P-V characteristics. However, the efficiency of the boost converter varies with the input voltage, and the MPP of the load when the converter efficiency is considered is different from the MPP of the PV array. Since the maximisation of power in the load is ultimately desirable, this study focuses on the maximisation of power to the load. The power transferred to load under different shading patterns is analysed and the results of the study are demonstrated through simulation and experimental results.

An Improved Variable Step Size MPPT Algorithm Based on INC

“…Its equivalent circuit [16] is shown in Fig. 1 and the I-V characteristic of a PV cell is given by the following equation [9]:…”

Decentralized Autonomous Hybrid Renewable Power Generation

“…Due to simplicity and robust nature, PO and curve fitting techniques are widely used. MPPT techniques and algorithms have gained attention of power system researchers [70][71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87] due to its dominant advantages over conventional techniques. Table 2 shows some commonly used control strategies for PV-MPPT and EUE obtained.…”

Partial Shading Detection in Solar System Using Single Short Pulse of Load

“…Partial shading is a serious problem and leads to lowering the efficiency of produced energy. There are several papers that describe how large is the impact of this phenomenon on the amount of produced energy [2,3]. The authors of [4] present a MATLAB-based modelling and simulation scheme suitable for studying the I−V and P−V characteristics of a PV array under a non-uniform insolation due to partial shading.…”