A Parameter Estimation Based MPPT Method for a PV System Using Lyapunov Control Scheme

Hussain, Amir; Garg, Man Mohan; Korukonda, Meher Preetam; Hasan, Shamim; Behera, Laxmidhar

doi:10.1109/tste.2018.2878924

Cited by 17 publications

(5 citation statements)

References 36 publications

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“…FIGURE 11 Dynamic response of the proposed non-linear resistance controller during start-up (time div. is 2.5 ms).…”

Section: Backstepping Controller Designmentioning

confidence: 99%

“…While linear conventional controllers have been extensively used for MPPT of PV panels [9], their ability to regulate the closed‐loop system effectively throughout an extensive operational range is limited due to the non‐linear characteristics of power electronics converters. Consequently, employing a non‐linear control method such as sliding mode [10] or a Lyapunov‐based approach [11] proves advantageous.…”

Section: Introductionmentioning

confidence: 99%

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Experimental evaluation of the backstepping‐based input resistance controller in step‐up DC–DC converter for maximum power point tracking of the thermoelectric generators

Mogadam,

Salimi,

Bathaee

et al. 2023

IET Power Electronics

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In this paper, a novel non‐linear model‐based approach is presented for maximum power point (MPP) tracking of thermoelectric generators (TEGs) using the backstepping controller. Considering the output voltage range of the thermoelectric devices, a step‐up DC–DC converter is employed as an interface between the load and input power source. According to the maximum power transfer theorem, if the equivalent input resistance of the converter (Rin) is equal to the internal resistance of the input source (RTEG), the TEG operation at the MPP will be achieved. Hence, defining the RTEG as a reference value and Rin as a feedback variable for a closed‐loop controller, the backstepping non‐linear controller is developed for input resistance control of the boost DC–DC converter. Owing to the non‐linear nature of the error variable in the input resistance control of the converters, conventional linear controllers cannot guarantee the system's closed‐loop stability within an extensive operational range. However, despite changes in generator's open‐circuit voltage (VOC) and RTEG, the designed closed‐loop controller can successfully stabilize the thermoelectric converter in different operational conditions. Considering the Lyapunov theorem and the Barbalat lemma, the asymptotic stability of the backstepping controller is proved. During the steady‐state operation, the actual values of the VOC and RTEG are updated periodically by the measurement of the converter input voltage/current values. To verify the functionality of the designed control method, PC‐based simulations are carried out in MATLAB/Simulink software. Moreover, by using TMS320F28335 digital signal processor from Texas Instruments and a simple thermoelectric simulator, the experimental response of the proposed controller is evaluated in dynamic and steady‐state conditions. The developed closed‐loop system can track the MPP of a TEG with zero steady‐state error, regardless of uncertain parameter variations.

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“…FIGURE 11 Dynamic response of the proposed non-linear resistance controller during start-up (time div. is 2.5 ms).…”

Section: Backstepping Controller Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of the backstepping‐based input resistance controller in step‐up DC–DC converter for maximum power point tracking of the thermoelectric generators

Mogadam,

Salimi,

Bathaee

et al. 2023

IET Power Electronics

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“…In [12], QZSC has been used in bidirectional power flow applications, where the buck and boost modes were individually controlled [13,14]. However, in the case of the converter connected to a standalone microgrid, it is essential that the DC link voltage is regulated in both modes of operation based on the power demand [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Design and Development of Fixed-Frequency Double-Integral SM-Controlled Solar-Integrated Bidirectional Quasi Z-Source DC-DC Converter in Standalone Battery Connected System

Battula

Panda

Garg

2022

International Transactions on Electrical Energy Systems

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DC microgrids have been quite popular in recent times. The operational challenges like control and energy management of the renewable-driven standalone DC microgrids have been an interest of research. This paper presents a bidirectional quasi Z-source DC-DC converter (BQZSDC). This converter topology has been developed based on a conventional buck-boost type bidirectional converter, and it interfaces the storage system and the common DC bus. The challenge, however, lies in effectively managing the uncertain renewable energy sources and the storage system and catering for the loads simultaneously. An effective control strategy is needed for that energy management and to achieve various microgrid objectives. This paper deals with one such effective control strategy implemented for BQZSDC. That is, the fixed-frequency double-integral sliding mode control (FF-DISMC) controls the converter to regulate the DC bus voltage and battery current. A detailed analysis of the controller is conducted, and its performance is evaluated for both charging (buck) and discharging (boost) modes. Simulations have been performed in MATLAB, showing that the controller performs satisfactorily in achieving the objectives of voltage regulation and battery current regulation. Finally, the performance of the proposed controller is validated with the hardware setup.

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“…Unfortunately, despite the several attributes, the accuracy and efficacy of solar PV are greatly affected due to the change in environmental conditions. Therefore, before proceeding to the installation part, the development of the accurate mathematical model of solar PV is highly desirable to get the precise characteristics under the varying environmental conditions 2,3 . Though several attempts were made for the development of the accurate model of solar PV but the model based on the electrical equivalent circuit, consisting of both linear as well as nonlinear components, is highly recommended in the research for the analysis 4 .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, before proceeding to the installation part, the development of the accurate mathematical model of solar PV is highly desirable to get the precise characteristics under the varying environmental conditions. 2,3 Though several attempts were made for the development of the accurate model of solar PV but the model based on the electrical equivalent circuit, consisting of both linear as well as nonlinear components, is highly recommended in the research for the analysis. 4 Over a decade, several models, based on the electrical equivalent circuit, were developed, starting from the most accustomed model pertaining to its accuracy and simplicity, single exponential model (SEM), consisting of the current source in parallel with a p-n junction diode, is often been recommended by the research communities.…”

Section: Introductionmentioning

confidence: 99%

A novel hybrid parameter estimation technique of solarPV

Rawat

Thakur

Singh

2021

Intl J of Energy Research

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Summary This paper develops a novel hybrid parameter estimation technique of the solar photovoltaic (PV) cell. First, a mathematical model of the solar PV cell, which is a function of three unknown parameters, namely, series resistance, shunt resistance, and thermal voltage, is developed. Then, trust‐region algorithms are used to evaluate these three unknown parameters. The accuracy and efficacy of the proposed technique are tested with five different PV modules of mono‐ and poly‐crystalline materials by estimating their various benchmarks, such as relative maximum power error (RMPE), root mean square error (RMSE) and mean absolute error (MAE) of the current. In addition, the results of the proposed technique are compared with the experimental as well as the results obtained from other established techniques. The %RMSE, as obtained with the proposed technique, is found in order of 10−4 while the other techniques provide the value in the range between 10−1 and 10−3. Similarly, %MAE and %RMSE, as obtained with the proposed technique, are found 0.064 and 0.17, respectively, which is smaller than the other existing techniques. Hence, the proposed hybrid technique provides characteristics that are almost similar to the real characteristics of solar PV. Highlights The characteristic equation is developed in terms of Rs, Rp, and Vth. The hybrid technique is used to evaluate five unknown parameters of solar PV. Various performance indicators have been estimated for different types of solar PV. Characteristics obtained with the proposed technique are similar to real characteristics. The proposed technique reduces the complexity of parameter estimations.

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A Parameter Estimation Based MPPT Method for a PV System Using Lyapunov Control Scheme

Cited by 17 publications

References 36 publications

Experimental evaluation of the backstepping‐based input resistance controller in step‐up DC–DC converter for maximum power point tracking of the thermoelectric generators

Experimental evaluation of the backstepping‐based input resistance controller in step‐up DC–DC converter for maximum power point tracking of the thermoelectric generators

Design and Development of Fixed-Frequency Double-Integral SM-Controlled Solar-Integrated Bidirectional Quasi Z-Source DC-DC Converter in Standalone Battery Connected System

A novel hybrid parameter estimation technique of solarPV

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