Efficient Photovoltaic System Maximum Power Point Tracking Using a New Technique

Abstract

Abstract:Partial shading is an unavoidable condition which significantly reduces the efficiency and stability of a photovoltaic (PV) system. When partial shading occurs the system has multiple-peak output power characteristics. In order to track the global maximum power point (GMPP) within an appropriate period a reliable technique is required. Conventional techniques such as hill climbing and perturbation and observation (P&O) are inadequate in tracking the GMPP subject to this condition resulting in a dramatic reduction in the efficiency of the PV system. Recent artificial intelligence methods have been proposed, however they have a higher computational cost, slower processing time and increased oscillations which results in further instability at the output of the PV system. This paper proposes a fast and efficient technique based on Radial Movement Optimization (RMO) for detecting the GMPP under partial shading conditions. The paper begins with a brief description of the behavior of PV systems under partial shading conditions followed by the introduction of the new RMO-based technique for GMPP tracking. Finally, results are presented to demonstration the performance of the proposed technique under different partial shading conditions. The results are compared with those of the PSO method, one of the most widely used methods in the literature. Four factors, namely convergence speed, efficiency (power loss reduction), stability (oscillation reduction) and computational cost, are considered in the comparison with the PSO technique.

Scenario-based wind speed estimation using a new hybrid metaheuristic model: Particle swarm optimization and radial movement optimization

“…Nop is normally equal to the number of variables that would be optimized, but it can be selected by the user on demand. 48,49 The step after obtaining the center point (cp) once is the dispersion of the particles from cp along the radius. This moves the particles from V ij -vector-based cp along the radius as straight lines.…”

“…The V ij vector is a random nop 3 nop vector that is obtained by the equation below. The coefficient k in the equation should be a carefully selected integer 45,[47][48][49] As shown in equation 2, the speed vector has a weight of inertia (W) that is associated with and determines the convergence speed of the algorithm to an extent. This weight has a value that decreases along the generation iteration.…”

Numerical Performance Evaluation of Solar Photovoltaic Water Pumping System under Partial Shading Condition using Modern Optimization

“…The performance of the achieved results of FOA-MPPT technique is performed in [42] and it is proven that this technique performs better than the standard PSO technique in terms of the speed, accuracy of tracking, and dynamic response. In [43], an optimization approach named Radial Movement Optimization (RMO), has been used for tracking the global maximum power point regardless of the environmental conditions. The tracking performance of the maximum power under the different shading patterns is much improved compared with other existing techniques based on PSO.…”

A New Algorithm Based Charge Controller for Global MPPT of Si Solar Cell

“…However, in practical cases, for partial shading condition the output power-voltage (P-V) curve of a PV array contain a huge number of ripples and complex multiple peaks which are known as local maxima, thus reducing the efficiency and stability of the system. Apart from the conventional MPPT techniques new methods for global maximum power point (GMPP) tracking were reported like hybrid MPPT methods using an augmented state feedback precise linearization (AFL) controller combined with an artificial neuron network (ANN) [22], Radial Movement Optimization (RMO) [23] and so on. To extract the utmost power, GMPP must be tracked with quick and reliable technique.…”