An Approval of MPPT Based on PV Cell’s Simplified Equivalent Circuit During Fast-Shading Conditions

Abstract

The partial shading conditions significantly affect the functionality of solar power plants despite the presence of multiple maximum power point tracking systems. The primary cause of this problem is the presence of local maxima in the power–current and/or power–voltage characteristic curves that restrict the functionality of the conventional maximum power point tracking systems. The present article proposes a modified algorithm based on the simplified equivalent circuit of solar cells to improve the functionality of traditional maximum power point tracking systems. This algorithm provides a method for regularly monitoring the photo-current of each solar module. The upper and lower boundaries of the regulating parameter such as current or voltage are decided very precisely, which is helpful to find the location of the global maximum. During a sequential search, the control system accurately determines the lower and upper boundaries of the global maximum. Simultaneously, the maximum power point tracking system increases the photovoltaic current up to one of these boundaries and applies one of the conventional algorithms. Additionally, the control system regularly monitors the photovoltaic characteristics and changes the limits of regulating parameter concerning any change in global maximum location. This proposed method is fast and precise to locate the global maximum boundaries and to track global maximum even under fast-changing partial shading conditions. The improved performance and overall efficiency are validated by simulation study for variable solar irradiance.

An Effective Method for Parameter Estimation of a Solar Cell

“…Regulate the fitness of all agents in the search space using Equation (3). Update the position of the agents at every iteration using WOAPSO.…”

“…Despite the very low operational and maintenance cost, there are various limitations for efficient energy generation. An enormous amount of research has been performed and carried out to better the power output from the PV panels [3,4]. The major limitation in the execution and implementation of the solar PV power plants is the very high capital cost for installation [5].…”

“…The practical parameters vary at every instant with a change in weather conditions. The aging effects of PV also alter the parameters of the equivalent circuit [3,8,9].…”

Control the Voltage Instabilities of Distribution Lines using Capacitive Reactive Power

“…These voltage fluctuations can occur over the permissible limits and are not allowed for standard devices. It is well-known that abrupt changes in electrical power generation are a distinctive feature of PV solar plants [3]. At every substation, the transformers are installed to link the transmission line with a distribution line.…”

Studies on Dynamic Properties of Ultracapacitors Using Infinite r–C Chain Equivalent Circuit and Reverse Fourier Transform

“…Electrical energy storage devices are also used for smart grid control, grid stability, and peak-power saving as well as for frequency and voltage regulation [3][4][5]. Electricity generated from renewable sources (e.g., solar power, wind energy) can hardly deliver an immediate response to demand because of fluctuating power supply [6][7][8]. Hence, it has been suggested to preserve the harvested electrical energy for future requirements.…”