A Total-Cross-Tied-Based Dynamic Photovoltaic Array Reconfiguration for Water Pumping System

Abstract

Most Photo-voltaic (PV) applications require a shadow-free area for the installation of the PV panels. However, shading is inevitable in a few applications like building-integrated PV pumping systems (BIPVPS). Partial shading occurs due to soiling, clouds, shades of nearby trees, buildings, current, and telephone poles. During this partial shading condition, the PV array output power decreases, reducing the efficiency of the BIPVPS. In this paper, a novel dynamic array reconfiguration technique is proposed to enhance the power output from the PV array. This paper uses a boost converter with an incremental conductance algorithm for operating enhanced power at the maximum. Sinusoidal Pulse Width Modulation (SPWM) technique based V /f control operates the induction motor. Thus, the proposed algorithm and maximum power point technique (MPPT) enhance the power output from the PV array and track the global power. The PI and V /f control regulate the dc-link voltage and speed of the Induction motor. Simulations and experimental studies are performed to show the effectiveness of the proposed algorithm. The proposed system results in additional 234 W PV power extraction compared to the conventional system. Thus, the proposed method enhances the overall performance of the system.INDEX TERMS Partial shading, dynamic reconfiguration, total-cross-tied, power enhancement, PV water pumping.

Solar Array Optimization Using Cryptographic Fibonacci Transformation for Global Power Enhancement and Ease of MPPT Controllers

“…The proposed methodology doesn't have any such problems. 3) The EAR‐based dynamic methods [ 47 ] need a regulator to deliver the gating pulses for power switches as per the dispersed shade pattern. Besides, a massive number of switching patterns to determine the optimum array configuration.…”

Enhancement of photovoltaic array characteristics and global maximum power using Padovan transform‐based image encryption strategy

“…Based on the way of functioning, reconfiguration techniques are generally categorized as static and dynamic. Electrical array reconfiguration (EAR), 7,8 artificial intelligence (AI), 9,10 and metaheuristic-based [11][12][13][14][15][16][17] approaches are the three main types of dynamic strategies. The AI-based solutions reduce mismatch losses, but they include both static and adaptive sections of an array, with only the adaptive section being able to be changed, failing to find the best solution.…”

Normalized Model Reference Adaptive Control Applied to High Starting Torque Scalar Control Scheme for Induction Motors

“…It is used in low-performance applications, demanding a low starting-electromagnetic torque, up to 25% of the nominal torque. Examples of these applications are: blowers, fans, and centrifugal pumps [4]. Furthermore, it has the simplest control scheme of all the VFD, not needing parameters or variables estimators.…”

“…Furthermore, the work by [6] proposes an optimal v/f ratio based on a reactive power estimate. On the other hand, the SCS has a steady-state speed accuracy of between 1% and 4% [2,4,5], which some works aim to improve i.e., in [7], after using closed-loop speed control, while [8] proposes a PI slip controller. The work by [9] proposes a rotor angular speed observer based on a spectral search method.…”