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An integrated hybrid power supply for distributed generation applications fed by nonconventional energy sources / Jain, S. in IEEE transactions on energy conversion, Vol. 23 n°2 (Juin 2008) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 23 n°2 (Juin 2008) . - pp. 622 - 631 Titre : An integrated hybrid power supply for distributed generation applications fed by nonconventional energy sources Type de document : texte imprimé Auteurs : Jain, S., Auteur ; Agarwal, V., Auteur Année de publication : 2008 Article en page(s) : pp. 622 - 631 Note générale : Energy conversion Langues : Anglais (eng) Mots-clés : DC-DC  power  convertors;  distributed  power  generation;  fuel  cell  power  plants;  hybrid  power  systems;  photovoltaic  power  systems Résumé : A new, hybrid integrated topology, fed by photovoltaic (PV) and fuel cell (FC) sources and suitable for distributed generation applications, is proposed. It works as an uninterruptible power source that is able to feed a certain minimum amount of power into the grid under all conditions. PV is used as the primary source of power operating near maximum power point (MPP), with the FC section (block), acting as a current source, feeding only the deficit power. The unique "integrated" approach obviates the need for dedicated communication between the two sources for coordination and eliminates the use of a separate, conventional dc/dc boost converter stage required for PV power processing, resulting in a reduction of the number of devices, components, and sensors. Presence of the FC source in parallel (with the PV source) improves the quality of power fed into the grid by minimizing the voltage dips in the PV output. Another desirable feature is that even a small amount of PV power (e.g., during low insolation), can be fed into the grid. On the other hand, excess power is diverted for auxiliary functions like electrolysis, resulting in an optimal use of the energy sources. The other advantages of the proposed system include low cost, compact structure, and high reliability, which render the system suitable for modular assemblies and "plug-n-play" type applications. All the analytical, simulation, and experimental results of this research are presented. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4488040&sortType%3Das [...] [article] An integrated hybrid power supply for distributed generation applications fed by nonconventional energy sources [texte imprimé] / Jain, S., Auteur ; Agarwal, V., Auteur . - 2008 . - pp. 622 - 631. Energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 23 n°2 (Juin 2008) . - pp. 622 - 631 Mots-clés : DC-DC  power  convertors;  distributed  power  generation;  fuel  cell  power  plants;  hybrid  power  systems;  photovoltaic  power  systems Résumé : A new, hybrid integrated topology, fed by photovoltaic (PV) and fuel cell (FC) sources and suitable for distributed generation applications, is proposed. It works as an uninterruptible power source that is able to feed a certain minimum amount of power into the grid under all conditions. PV is used as the primary source of power operating near maximum power point (MPP), with the FC section (block), acting as a current source, feeding only the deficit power. The unique "integrated" approach obviates the need for dedicated communication between the two sources for coordination and eliminates the use of a separate, conventional dc/dc boost converter stage required for PV power processing, resulting in a reduction of the number of devices, components, and sensors. Presence of the FC source in parallel (with the PV source) improves the quality of power fed into the grid by minimizing the voltage dips in the PV output. Another desirable feature is that even a small amount of PV power (e.g., during low insolation), can be fed into the grid. On the other hand, excess power is diverted for auxiliary functions like electrolysis, resulting in an optimal use of the energy sources. The other advantages of the proposed system include low cost, compact structure, and high reliability, which render the system suitable for modular assemblies and "plug-n-play" type applications. All the analytical, simulation, and experimental results of this research are presented. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4488040&sortType%3Das [...]

Universal single-stage grid-connected inverter / Prasad, B.S. in IEEE transactions on energy conversion, Vol. 23 N°1 (Mars 2008) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 23 N°1 (Mars 2008) . - pp. 128 - 137 Titre : Universal single-stage grid-connected inverter Type de document : texte imprimé Auteurs : Prasad, B.S., Auteur ; Jain, S., Auteur ; Agarwal, V., Auteur Année de publication : 2008 Article en page(s) : pp. 128 - 137 Note générale : Energy conversion Langues : Anglais (eng) Mots-clés : PWM  invertors;  distributed  power  generation;  power  convertors Résumé : A new single-stage grid-connected inverter, suitable for distributed generation applications, is proposed. The inverter is universal in the sense that it can be switched between buck, boost, and buck--boost configurations by appropriately altering the pulse width modular (PWM) control. Discontinuous current mode (DCM) operation is implemented to facilitate shuffling between configurations during the converter operation. Such flexibility ensures maximum benefit of the buck, boost, and the buck--boost operations (e.g., low device stresses, higher efficiency, higher boosting capability, etc.). The PWM is achieved by comparing a high frequency carrier (triangular) waveform with a suitable reference waveform, which is not necessarily sinusoidal, but has a shape specific to the individual configuration and is derived by equating the power fed into the grid with that extracted from the source during each switching cycle. The values of the components (inductors and capacitors) need to be optimized so that DCM is maintained and the required amount of energy is transferred to the grid in all the three configurations during their respective operation. All the design expressions have been derived. A salient feature of this inverter is its compatibility with various types of sources (PV array, fuel cell, etc.) with varying voltage levels and control requirements. Being single-stage, the proposed topology offers additional advantages like modularity, compactness, and low cost. All the details of simulation and experimental work are presented. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4374094&sortType%3Das [...] [article] Universal single-stage grid-connected inverter [texte imprimé] / Prasad, B.S., Auteur ; Jain, S., Auteur ; Agarwal, V., Auteur . - 2008 . - pp. 128 - 137. Energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 23 N°1 (Mars 2008) . - pp. 128 - 137 Mots-clés : PWM  invertors;  distributed  power  generation;  power  convertors Résumé : A new single-stage grid-connected inverter, suitable for distributed generation applications, is proposed. The inverter is universal in the sense that it can be switched between buck, boost, and buck--boost configurations by appropriately altering the pulse width modular (PWM) control. Discontinuous current mode (DCM) operation is implemented to facilitate shuffling between configurations during the converter operation. Such flexibility ensures maximum benefit of the buck, boost, and the buck--boost operations (e.g., low device stresses, higher efficiency, higher boosting capability, etc.). The PWM is achieved by comparing a high frequency carrier (triangular) waveform with a suitable reference waveform, which is not necessarily sinusoidal, but has a shape specific to the individual configuration and is derived by equating the power fed into the grid with that extracted from the source during each switching cycle. The values of the components (inductors and capacitors) need to be optimized so that DCM is maintained and the required amount of energy is transferred to the grid in all the three configurations during their respective operation. All the design expressions have been derived. A salient feature of this inverter is its compatibility with various types of sources (PV array, fuel cell, etc.) with varying voltage levels and control requirements. Being single-stage, the proposed topology offers additional advantages like modularity, compactness, and low cost. All the details of simulation and experimental work are presented. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4374094&sortType%3Das [...]