Matlab-Simulink Based Modeling to Study the Influence of Nonuniform Insolation Photovoltaic Array

Sunan

IET Renewable Power Generation

et al. 2018

Under partially shaded conditions (PSC), a photovoltaic (PV) array takes on more complex characteristics. It is very difficult and utterly necessary for PV system designers to understand and predict them. Other than the prevailing methodology of solving a set of non-linear equations, the proposed methodology focuses on three key points of short circuit, MPP and open circuit. Besides, its V-I curve is split into three regions and replaced by three asymptote lines. From this viewpoint, this paper presents a novel Psim-based piece-wise linear macro-model whose circuit parameter values are determined based on the foregoing three key points. The novel model, compared with the other published models, is characterised by short running time, relative high accuracy, and reliable unique solution. This model avoids the computational complexity and convergence issue. Furthermore, based on the novel model, an optimising configuration-simulation model is presented for PV system designers to optimise PV array configurations under several given shaded patterns. Two new concepts of power and voltage reducing rate shall be introduced to estimate the PSC effect. The novel model and formulas, therefore, shall provide a good solution for studying the behavior of a large-scale PV array in a complex scenario.

Section: Engineering Model For Pv Module and Arraymentioning

confidence: 99%

Macro‐model of PV module and its application for partial shading analysis

Sunan

IET Renewable Power Generation

et al. 2018

“…In equation ( 1): I is operating current of solar cell; I s is short-circuit current; I 0 is reverse saturation current; q is charge constant; V is output voltage; A is diode P-N junction coefficient; K is Boltzmann constant; T is absolute temperature. The I~V curve will be got by equation (1). But the five coefficients including I s , I 0 , R s , R sh , A, which are related to the temperature of solar cell and insolation, and they are difficult to confirm.…”

Section: Power Tracking Control Strategy Based On Feedback Frequencymentioning

confidence: 99%

“…Analyzing the PV characteristic curve is the first thing to research the PV generation. In paper [1], a simulation model of PV module based on Simulink is built in accordance with PV module's physical and mathematical model. The ∼ I V curve of PV is determined by this physical and mathematical model.…”

Section: Introductionmentioning

confidence: 99%

Power Tracking Control Strategy Based on Feedback Frequency of Large-Scale Grid-Connected PV Generation

Zhao

Zhong

Malik

et al. 2014

AMR

PV (Photovoltaic) generation output with MPPT (Maximum power point tracking) is unadjustable. In this paper, PV generation is expected to regulate grid frequency. Thus a power tracking control strategy based on feedback frequency instead of MPPT is put forward. The feedback frequency is transferred to controlling unit of DC-DC inverter. The DC bus voltage is adjusted by controlling the duty cycle of DC-DC invertor. A grid-connected PV system with a power tracking control strategy based on feedback frequency and a DC-AC inverter control module are built in MATLAB-Simulink platform. Experiment result indicates that PV generation could regulate grid frequency by the control strategy based on feedback frequency.

“…It is one of the most promising alternatives for conventional energy sources. Due to this, photovoltaic solar energy has been increasingly used to generate electric power [1,2,11].…”

Section: Introductionmentioning

confidence: 99%

Matlab-Simulink of photovoltaic system based on a two-diode model simulator with shaded solar cells

Belhaouas,

Ait Cheikh,

Malek

et al. 2023

J. Ren. Energies

This paper proposes a photovoltaic system modeling and characterization software based on Matlab-Simulink in order to estimate the parameters and the characteristic and electrical behavior of a cell/module with respect to changes in environmental parameter regarding irradiance, temperature, and surface conditions (partial shading). The first objective is to find the parameters of the nonlinear I–V equation by adjusting the curve regarding three particular points: open circuit, maximum power, and short circuit. Given these three points, which are provided by all commercial module datasheets, the method finds the best I–V equation for the two-diode photovoltaic (PV) model, with the best series and parallel resistances estimates. The accurateness of the simulator is verified by applying the model to different manufacturer’s modules. Thanks to an interactive graphic interface, this software offers a great flexibility to PV professional and to researchers.