Power control of a photovoltaic array in a hybrid electric generation system using sliding mode techniques

Valenciaga, Fernando; Puleston, Pablo Federico; Battaiotto, Pedro Eduardo

doi:10.1049/ip-cta:20010785

Cited by 78 publications

(37 citation statements)

References 12 publications

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“…Electron-hole pairs are created inside the solar cell as a result of absorption of the photons incident on the solar cell from the sun. The objective is to collect the minority carriers before they are lost to recombination [10]. The data storage unity is represented by datalogger Agilent 34970 (Data Acquisition/Switch Unit) whose sensors of temperature and luminous intensity are attached to.…”

Section: Rationalementioning

confidence: 99%

Experimental setup for multiparametric characterization of photovoltaic panels

Lay-Ekuakille¹,

Trotta

Miduri

et al. 2009

Africon 2009

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Photovoltaic panels (PVs) are growing in terms of development and utilization all over the world. Different manufacturers deliver photovoltaic panel characteristics according to the locations where they are tested. Since there are different technological materials used in the manufacturing of PVs, the present research represents an effective method of prediction of the energy produced by the photovoltaic systems and an acceptable method of their characterization by using an experimental setup. The prediction of the energy produced by a photovoltaic system is generally made through software which uses algorithms that describe the trend of the efficiency of the panels depending on the temperature, the radiation and, in more particular cases, depending on the incident spectrum features.The characterization of PV module or panel is an important objective in order to determine its performance, specifically in terms of the maximum power point P max , which is usually evaluated by varying the forward bias voltage across the device under test while illuminated. The I-V curve is then recorded by measuring the current and voltage. Unfortunately, the determination of P max is not easy because it is a function of the total and spectral irradiance incident upon the device, the spatial and temporal uniformity of the irradiance, and the temperature of the device. It can even be function of the voltage sweep rate and direction, as well as the voltage biasing history. Beyond the maximum power point, the power conversion efficiency η, defined as the power out divided by the power in, is proportional to P max , and also to radiometric and physical quantities, so max P AG η =in which A and G are the physical area of the device and the total incident irradiance respectively. Accurate assessment of PV performance requires knowledge of the potential measurement issues and how these problems are influenced by the specific device to be tested. The problems with measurement comparisons for different PV modules bring to the idea of standard reporting conditions SRC, also called standard test conditions, STC, which consist of the device temperature, the total irradiance, and the spectral irradiance under which PV performance measurements [1] [2] are made or corrected to. Using SRC allows performance comparisons to be made within the error uncertainty limits of the measurements involved. The PV current-voltage measurements are made in a simple way. The device under test is illuminated, the load is varied, and the operating point of the device under test changes, which allows the current and voltage points to be captured along the I-V curve [3] as indicated in fig.1 while fig.2 illustrates the P-V curves. Fig.1 Typical current-voltage curves of PV cellDifferent methods for modeling the energy production of photovoltaic systems have been presented, ranging from those using measure-correlate-predict [4] to those based on physical device models [5]. In between there are models which parameterize laboratory measurements, matrix methods and reali...

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Section: Rationalementioning

confidence: 99%

Experimental setup for multiparametric characterization of photovoltaic panels

Lay-Ekuakille¹,

Trotta

Miduri

et al. 2009

Africon 2009

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“…The PV panel is connected to the DC bus through a DC/DC buck converter [5] described by (14) (15) where is the battery voltage, is the current injected on the DC bus, is the voltage level on the PV panel array terminals, and is the control signal.…”

Section: Solar Subsystemmentioning

confidence: 99%

“…There are two modes of operation following [5]. The first occur when the PV array is capable of generating enough power to satisfy the total power demand.…”

Section: Smc Of the Solar Subsystemmentioning

confidence: 99%

Hierarchical control of Hybrid Power Systems

Torres-Hernández

Vélez-Reyes

2008

2008 11th IEEE International Power Electronics Congress

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This paper presents a Hierarchical controller for a DC bus configuration Hybrid Power System consisting of a Wind Turbine, Photovoltaic Panels, a Battery Bank, capability for connection to grid, and load. The proposed hierarchical control system consisted of lower level controllers for each generation and storage component designed using Sliding Mode Control and a supervisory controller that had the objective of maximizing use of the renewable sources while minimizing connection to the grid. The supervisory controller changed sliding surfaces and set points according to the operation conditions and performed load shedding based on load priorities when available generation is insufficient. The functionality and performance of the system is studied by means of simulations. The paper will present HPS model development, hierarchical controller design, and simulation results under the different operating scenarios. Simulation results show that the proposed controller has the capability to meet the design objectives with acceptable performance.

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“…Photovoltaic power systems are usually integrated with some specific control algorithms to deliver the maximum possible power (Hussein et al 1995). Several maximum power point tracking (MPPT) methods that force the operating point to oscillate have been presented in the past few decades (Hohm and Ropp 2000, Koutroulis et al 2001, Valenciaga et al 2001). …”

Section: Introductionmentioning

confidence: 99%

Automatic maximum power point tracker for solar PV modules using dSPACE software

Ansari¹,

Chatterji²,

Iqbal³

2010

International Journal of Sustainable Energy

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Maximization of power from a solar photovoltaic (SPV) module is of special interest as the efficiency of the SPV module is very low. The present work describes the maximum power point tracker (MPPT) for the SPV module connected at variable load conditions. A personal computer (PC) is used for control of the MPPT algorithm. The power tracker is developed and tested successfully in the laboratory. The simulations are carried out in Matlab/Simulink. Data acquisition, monitoring, and control are done by the dSPACE software. Different types of algorithms are studied. The algorithm implemented here is "perturb and observe" in a microcontroller-based PC to extract maximum power from the SPV module. The measured parameters such as panel voltage, current, and power are obtained with and without MPPT systems and have been tested on the SPV Module at various load conditions, different temperatures and insolation labels. The comparative results with and without MPPT are shown; the results show that the tracking capability with MPPT improves as compared with without MPPT. NomenclatureI ph photon generated current (A) I o reverse saturation current of the diode (A)duty cycle ratio D change in the duty cycle ratio K Boltzmann constant (1.38 × 10 −23 J/K)

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Power control of a photovoltaic array in a hybrid electric generation system using sliding mode techniques

Cited by 78 publications

References 12 publications

Experimental setup for multiparametric characterization of photovoltaic panels

Experimental setup for multiparametric characterization of photovoltaic panels

Hierarchical control of Hybrid Power Systems

Automatic maximum power point tracker for solar PV modules using dSPACE software

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