A Technique for Improving P&amp;O MPPT Performances of Double-Stage Grid-Connected Photovoltaic Systems

Femia, N.; Petrone, G.; Spagnuolo, G.; Vitelli, M.

doi:10.1109/tie.2009.2029589

Cited by 406 publications

(211 citation statements)

References 18 publications

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“…In grid connected mode, the MPP tracker conveys a reference voltage to the inverter, with the goal that it can perform Vdc regulation. The MPPT is implemented by method for a peturb and observe algorithm [9], [10]. The MPP tracker characterizes the set purpose of the dc-join voltage to concentrate the greatest yield power from the PV board.…”

Section: Pv System Modelmentioning

confidence: 99%

Grid and Islanded Operations of PV Energy Management System by Means of Reconfiguration of Controllers

Lokesh¹

2015

IJAREEIE

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ABSTRACT:In this idea the investigation, configuration of a photovoltaic energy management system with battery reinforcement displayed. The proposed system is work in both grid connected and autonomous load operations. Main advantage of the proposed system is that, the inverter functions as a current source in phase with the grid voltage, infusing energy to the network and controlling the dc-link voltage in grid-connected mode. The converter manages the battery charge and discharge. In islanded mode, the inverter control is reconnect to work as a voltage source using droop schemes. The dc/dc converter manage the dc-link voltage to empower the MPPT. An operation convention is proposed to guarantee the quality of the energy supply and minimize the losses of energy. A battery bank is joined with the dc interface as stores the energy for islanded operation mode. The point of this paper is to demonstrate that the proposed framework performs accurately, without risky homeless people for the inverter or the loads. Recreation and trial results on a 3-kW model demonstrate the possibility of the proposed control system. KEYWORDS:Battery backup, grid-connected mode, inverter, islanded mode, reconfigurable control scheme. I.INTRODUCTIONLately, the advancement of option energy sources has turn into a worldwide need, offering ascent to escalated research about less naturally contaminating renewable sources.The foundation of littler and distributed power plants has been taken off possible in view of changes in both the power system idea and the economy of scale. The proximity with in the middle of generation and utilization focuses has recovered significance and distributed generation (DG) advances have progressed extraordinarily lately. One approach to embed DG frameworks into an electrical system is through micro grids. A micro grid can be characterized as a combination of loads and micro sources that give electric energy to a neighbourhood. The operation of a micro grid offers specific advantages to clients and utilities, i.e., enhanced energy efficiency , reduced ecological effect, and more reliability. A standout amongst the most important features of microgrids is that they can freely work in islanded mode without association with the distribution system when power system shortcomings or power blackouts happen. Various commercial photovoltaic (PV) inverters work as a current source in grid-connected mode. The control of inverters has grown after some time and is presently highly efficient for this operational mode. A few works manage the right operation of inverters working in grid connected and islanded modes. A possible solution is based on droop schemes. These plans use P−Q strategies in the inverters to appropriately share the power conveyed to the loads while avoiding critical communication lines. In [1] and [2], the inverters are controlled by method for droop schemes in both operational modes, with the goal that no advantage is taken from control calculations that inject the inverter yield current in stage with th...

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Section: Pv System Modelmentioning

confidence: 99%

Grid and Islanded Operations of PV Energy Management System by Means of Reconfiguration of Controllers

Lokesh¹

2015

IJAREEIE

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“…Algorithms like improved perturbation and observation method (Femia et al, 2009), sliding mode observer technique (Kim et al, 2006), or some others (Park et al, 2006;Kwon et al, 2006) are used to track the maximum power point (MPP). In order to increase the system efficiency is preferred to have low voltage with the solar cell array (Ertl et al, 2002), and also some wind systems generate relatively low voltage.…”

Section: Grid Connected Systemsmentioning

confidence: 99%

A DC/DC Converter for Clean-Energy Applications

Vázquez¹,

Hernandez²,

Vázquez³

2010

Clean Energy Systems and Experiences

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“…The inverter is controlled to follow a required power factor, provide synchronization and protect against islanding, among others (Romero-cadaval, Spagnuolo, & Franquelo, 2013). Moreover, the inverter must regulate the dc-link voltage at the bulk capacitor C b , where two cases are possible: first, the inverter regulates the DC component of C b voltage, but due to the sinusoidal power injection into the grid, C b voltage experiments a sinusoidal perturbation at twice the grid frequency and with a magnitude inversely proportional to the capacitance (Femia, Petrone, Spagnuolo, & Vitelli, 2009). In the second case, the DC component of C b voltage is not properly regulated, which produces multiple harmonic components with amplitude inversely proportional to the load capacitance (Femia et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the inverter must regulate the dc-link voltage at the bulk capacitor C b , where two cases are possible: first, the inverter regulates the DC component of C b voltage, but due to the sinusoidal power injection into the grid, C b voltage experiments a sinusoidal perturbation at twice the grid frequency and with a magnitude inversely proportional to the capacitance (Femia, Petrone, Spagnuolo, & Vitelli, 2009). In the second case, the DC component of C b voltage is not properly regulated, which produces multiple harmonic components with amplitude inversely proportional to the load capacitance (Femia et al, 2009). In both cases the DC/DC converter output terminals are exposed to voltage perturbations that could be transferred to the PVM terminals, thus degrading the MPP tracking process.…”

Section: Introductionmentioning

confidence: 99%

Auto-tuning of PV controllers to improve the speed response and stability of the P&O algorithm

Valencia

Ramos‐Paja

2015

ing.inv.

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This paper proposes an auto-tuning control system to ensure a fast response of the photovoltaic (PV) voltage by reducing the perturbation time of a P&O algorithm. This solution accelerates the tracking of the maximum power point and, at the same time, guarantees the system stability, which increases the amount of energy produced by the PV system. The control system consists of three cascaded controllers: a P&O algorithm dynamically parameterized by the adaptive law in order to guarantee stability; an adaptive PI controller whose parameters are modified by the adaptive law, depending on the operating conditions, to reduce the settling time of the system as much as possible; and a sliding mode current controller to mitigate environmental and load perturbations and ensure global stability. The design of the new control structure is supported by mathematical analyses and validated with simulations performed in PSIM in order to demonstrate the robustness of the proposed solution.Keywords: Adaptive control, photovoltaic system, sliding mode, perturb and observe, maximum power point tracking. RESUMENEn este trabajo se propone un sistema de control auto-ajustable para garantizar una respuesta rápida del sistema fotovoltaico (PV) mediante la reducción del tiempo de perturbación del algoritmo P&O. Con esta solución se logra acelerar el seguimiento del punto de máxima potencia y al mismo tiempo garantizar la estabilidad del sistema, incrementando de esta manera la cantidad de energía producida. La ley de control está compuesta por tres controladores en cascada: Un algoritmo P&O parametrizado dinámicamente; un control adaptativo PI, cuyos parámetros son modificados por la ley de adaptación dependiendo de las condiciones de operación para reducir el tiempo de establecimiento tanto como sea posible; y un controlador en modos deslizantes de corriente que mitiga las perturbaciones ambientales y de la carga para garantizar la estabilidad global. El diseño de la nueva estructura de control se soporta con análisis matemáticos y se valida con simulaciones realizadas en PSIM que demuestran la robustez de la solución.Palabras clave: Control adaptativo, sistema fotovoltaico, modo deslizante, perturbar y observar, seguimiento del punto de máxima potencia.

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A Technique for Improving P&O MPPT Performances of Double-Stage Grid-Connected Photovoltaic Systems

Cited by 406 publications

References 18 publications

Grid and Islanded Operations of PV Energy Management System by Means of Reconfiguration of Controllers

Grid and Islanded Operations of PV Energy Management System by Means of Reconfiguration of Controllers

A DC/DC Converter for Clean-Energy Applications

Auto-tuning of PV controllers to improve the speed response and stability of the P&O algorithm

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