scholarly journals Modifications to Accelerate the Iterative Algorithm for the Single Diode Model of PV Model

2020 ◽  
Vol 18 (47) ◽  
pp. 33-43
Author(s):  
Mohammed RASHEED ◽  
Suha SHIHAB
Keyword(s):  
Solar Cell ◽  
Nonlinear Equation ◽  
Ambient Temperature ◽  
Equivalent Circuit ◽  
Iterative Algorithm ◽  
Load Resistance ◽  
New Method ◽  
Initial Value ◽  
The Absolute ◽  
Resistance Equation

This paper discussed the solution of an equivalent circuit of solar cell, where a single diode model is presented. The nonlinear equation of this model has suggested and analyzed an iterative algorithm, which work well for this equation with a suitable initial value for the iterative. The convergence of the proposed method is discussed. It is established that the algorithm has convergence of order six. The proposed algorithm is achieved with a various values of load resistance. Equation by means of equivalent circuit of a solar cell so all the determinations is achieved using Matlab in ambient temperature. The obtained results of this new method are given and the absolute errors is demonstrated.

scholarly journals Two Step and Newton- Raphson Algorithms in the Extraction for the Parameters of Solar Cell

2021 ◽  
Vol 26 (1) ◽  
pp. 143-154
Author(s):  
Mohammed RASHEED ◽  
Suha SHIHAB ◽  
Taha RASHID
Keyword(s):  
Solar Cell ◽  
Numerical Solution ◽  
Iterative Methods ◽  
Load Resistance ◽  
Initial Value ◽  
Matlab Program ◽  
Pv Cell ◽  
Newton Raphson

The goal of this work is to find a numerical solution of nonlinear solar cell equation. This equation has been instructed using a single-diode model. The proposed method consists of solving the equation using two iterative methods with the initial value . Moreover, the Newton's and Two-step methods are used to determine the required the current, the voltage, and the power of the PV cell in the procedure of the present research. Different values of load resistance have introduced with these methods. The obtained results appeard that the proposed method is the most efficient compare with NRM and all the calculations are achieved using Matlab program.

scholarly journals Modelling and Parameter Extraction of PV Cell Using Single-Diode Model

2020 ◽  
pp. 96-104
Author(s):  
Mohammed Siham Rasheed ◽  
Suha Shihab
Keyword(s):  
Solar Cell ◽  
Nonlinear Equation ◽  
Mathematical Models ◽  
Load Resistance ◽  
Parameter Extraction ◽  
Cell Parameters ◽  
Real Roots ◽  
Pv Cell ◽  
Newton Raphson ◽  
Raphson Method

In this work, numerical solution of nonlinear equations using Newton Raphson method (NRM) and a modified Newton-Raphson Method (MNRM) are utilized to solve and find the real roots of a nonlinear equation based on a single-diode PV cell. The proposed methods to solve nonlinear examples and obtain results with various values of a load resistance have been examined. The purpose of this paper is to obtain the results of solar cell parameters using two mathematical models with the comparison between them. The obtained results showed the proposed method (MNRM) is a powerful tool, sufficient way to solve this model with a least iterations.

All-Contactless Measurement of Series Resistance Distributions on Solar Cells with Photoluminescence Imaging

2011 ◽  
Author(s):  
M. Kasemann ◽  
L.M. Reindl ◽  
B. Michl ◽  
W. Warta ◽  
A. Schütt ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Current Flow ◽  
Series Resistance ◽  
Electrical Contacts ◽  
New Method ◽  
Contactless Measurement ◽  
Sample Handling ◽  
Imaging Methods ◽  
Lateral Current

Abstract Conventional series resistance imaging methods require electrical contacts for current injection or extraction in order to generate lateral current flow in the solar cell. This paper presents a new method to generate lateral current flow in the solar cell without any electrical contacts. This reduces the sample handling complexity for inline application and allows for measurements on unfinished solar cell precursors.

scholarly journals Estimation methods to extract complex permittivity from transmission coefficient in the terahertz band

2021 ◽  
Vol 53 (8) ◽  
Author(s):  
Chuang Yang ◽  
Jian Wang ◽  
Cheng Yang
Keyword(s):  
Transmission Coefficient ◽  
Iterative Algorithm ◽  
Complex Permittivity ◽  
Free Space ◽  
Estimation Methods ◽  
Extraction Technique ◽  
Initial Value ◽  
Terahertz Band ◽  
Terahertz Frequencies

AbstractIn this paper, the characteristics of the transmission coefficient (S$$_{21}$$ 21 ) measured in free-space at terahertz frequencies are analyzed. The analysis results are used to estimate the permittivity of the material under test, and the estimated permittivity is adopted as an initial-value for the iterative algorithm to extract the complex permittivity of the material from the S$$_{21}$$ 21 . The iterative extraction technique based on the estimation is efficient, while the iterative extraction technique without the estimation is inefficient. Various known materials in the literature are used to validate the technique in the terahertz band.

A New Method for Aggregate Proportion Design of Mixture

2012 ◽  
Vol 178-181 ◽  
pp. 1250-1253
Author(s):  
Yu Hua Li ◽  
Kai Huang ◽  
Ying Zhen Gao
Keyword(s):  
Iterative Algorithm ◽  
Accurate Result ◽  
High Accuracy ◽  
New Method ◽  
Equation Method ◽  
Normal Equation ◽  
Improved Method ◽  
Mixture Ratio ◽  
Target Value ◽  
Initial Target

When we make design of mixture ratio, we always use normal equation method (NEM), but the solution value of that method may doesn’t meet our demand. When we use the new method that proposed in this paper, we can solve the problem. The new method makes an improvement for NEM. By iterative algorithm, the new method uses the gradation data calculated by NEM as initial target value, canceling the relevant aggregate if the result of proportion is negative, and setting the gradation to the boundary value if the target value goes beyond limits. According to the adjusted object value, using NEM again, the new aggregate proportion can be solved. Then the new gradation of mixture will come into being the next target value. Finally, the accurate result will meet our need. The new improved method has good engineering applicability and high accuracy

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