Power tracking techniques for efficient operation of photovoltaic array in solar applications – A review

Riaz, Ahmad; Murtaza, Ali Faisal; Sher, Hadeed Ahmed

doi:10.1016/j.rser.2018.10.015

Cited by 200 publications

(100 citation statements)

References 142 publications

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“…Table 4 shows the calculation results for a sample of solar panels borrowed from [41]. Figure 6 and 7a-f shows the volt-ampere and volt-watt characteristics calculated by Equation (6,7,8), by which one can evaluate both the degree of similarity between the data taken from [41], and between the characteristic operating modes of these solar panels. It can be seen that the differences in the data from [41] and in our method are insignificant.…”

Section: Resultsmentioning

confidence: 99%

“…Consequently, the range of voltage variation will be determined using formulas (6), (7) and (32), (37) in this way:…”

Section: Elementmentioning

confidence: 99%

“…Obviously R s > 0 and R sh > 0. Solving Equations (6) and (7) as inequalities, we can find the range of variation of n at which these conditions are observed:…”

mentioning

confidence: 99%

“…Having data V oc ; I sc ; V mp ; I mp calculate I 0 and resistances R s and R sh by the formulas (4), (6) and (7). If necessary, adjust the ideality factor n in accordance with formulas (8).…”

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confidence: 99%

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Multivariable Control of Solar Battery Power by Extremum Seeking: Starting from Linear Analysis

Kirpichnikova¹,

Sologubov²

2019

Machines

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In this study, we tried to combine maximum power point trackers (MPPT) and «Extremum Seeking» in a single multi-parameter extremum seekeng system for orienting solar panels and draw attention to the problem of a deeper study of nonlinear adaptive control using appropriate methods for their analysis. MPPT controller becomes one of the extremum seeking loops, and as a result, the maximum power is achieved not only by searching for the optimal voltage value, but also due to the optimal angular position of the solar panel in Euclidean space, because the photocurrent depends on the angle of inclination of the Sun’s rays to the surface. The task of tuning extremum seeking loops becomes more analytically difficult, which is associated with nonlinear and multiply connected properties. This requires starting the solution from a simpler “linear” level. We applied the approach associated with the passage of modulating oscillations with a given frequency and amplitude through an open-loop system. This approach, which is generalized in this work at least for extremum seeking of the solar panels power, should be used for approximate calculations if there are no strict requirements for convergence and energy loss for the search. Research design is as follows: parametric identification of the current-voltage and volt-watt curves; obtaining the transfer function by the semi-automated sparse matrix method; reducing the order of the transfer function of coordinate electric drives by introducing a scaling factor. To the most important theoretical result, we attribute the property of the generalized amplitude of the solar panel power oscillations with multi-parameter control to be a combination of input modulating oscillations superimposed on the signals of the control integrators. Having revealed the relationship of their properties, it becomes possible to eliminate non-linearity from the system and operate only with the analytical relationship of the input modulating oscillations and the generalized oscillation of the controlled parameter. We attribute the prediction of the effect to one of the most interesting physical results, in which, for the same amplitude of modulating oscillations, the amplitudes of the photocurrent oscillations and the power of the solar panel at different angular positions will be generally different.

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Section: Resultsmentioning

confidence: 99%

“…Consequently, the range of voltage variation will be determined using formulas (6), (7) and (32), (37) in this way:…”

Section: Elementmentioning

confidence: 99%

“…Obviously R s > 0 and R sh > 0. Solving Equations (6) and (7) as inequalities, we can find the range of variation of n at which these conditions are observed:…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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Multivariable Control of Solar Battery Power by Extremum Seeking: Starting from Linear Analysis

Kirpichnikova¹,

Sologubov²

2019

Machines

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“…Currently, over 100 countries have installed ground-based or building-based PV systems. According the International Energy Agency Photovoltaic Power Systems Programme (IEA-PVPS) data, the power generation capacity of PV systems installed worldwide in March 2015 expanded to 227 GW and is expected to reach 500 GW by the end of 2020 [1]. As a clean energy source, solar power does not emit CO 2 or cause environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

A high-performance MPPT algorithm combining advanced three-point weight comparison and temporary stopped running strategy for PV systems

Liu

2019

IEICE Electron. Express

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This paper proposes a new maximum power point tracking (MPPT) control strategy, including a boost converter temporary stopped running (TSR) strategy and an advanced three-point weight comparison method (ATPWC). The proposed ATPWC was used to detect three power points of a photovoltaic (PV) module output, and a microcontroller unit (MCU) was used to calculate the slope of the three power points and to perform MPPT so as to improve the system's conversion efficiency. The proposed method was successfully applied to an independent solar power generation system, in which the PV module was connected to a boost converter and then connected in series with an inverter to a single-phase 110 VAC/60 Hz output and connected to the power grid. The measured results showed that, in terms of the TSR control strategy, when the system output met a load of 110 Vrms, TSR could reduce switching loss and conduction loss and result in a 10% higher overall system conversion efficiency than that of traditional control. In terms of the MPPT algorithm, actual measurements were carried out under an irradiance level of 100 W/m 2 ∼700 W/m 2. Versus traditional hill climbing (HC) algorithm, the efficiency of the proposed ATPWC was better.

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A state‐of‐the‐art review on conventional, soft computing, and hybrid techniques for shading mitigation in photovoltaic applications

Kumar

Nema

et al. 2020

Int Trans Electr Energ Syst

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Summary This article intends to present a compendious review to extract maximum power in solar photovoltaic (PV) systems under varying environmental conditions and partial shading conditions by enumerating various circuit‐based topologies and different state‐of‐the‐art maximum power point techniques (MPPT). Partial shading reduces the overall efficiency of the PV system; therefore techniques that are dealing with partial shading play an important part in the power conditioning unit of all PV system connected to the stand‐alone mode or grid mode. Various circuit‐based topologies and various algorithms have been broadly discussed till date. As every algorithm is associated with its own merits and demerit, hence an extensive literature survey is required while planning for PV generating station under normal and partial shading condition. In this article, a comprehensive review of shading mitigation using different topologies has been done. The article on shading mitigation is broadly divided into two major groups. The first group includes all major circuit‐based topologies and the second group includes MPPT based techniques, which has been further classified into modified conventional techniques, soft computing techniques, and hybrid techniques. This comprehensive review presents an assessment of all techniques according to parameters like converter used, tracking speed, complexity, efficiency, number of sensors under partial shading condition would certainly provide a single platform to carry forward their research in solar PV application.

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Power tracking techniques for efficient operation of photovoltaic array in solar applications – A review

Cited by 200 publications

References 142 publications

Multivariable Control of Solar Battery Power by Extremum Seeking: Starting from Linear Analysis

Multivariable Control of Solar Battery Power by Extremum Seeking: Starting from Linear Analysis

A high-performance MPPT algorithm combining advanced three-point weight comparison and temporary stopped running strategy for PV systems

A state‐of‐the‐art review on conventional, soft computing, and hybrid techniques for shading mitigation in photovoltaic applications

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