Efficiency Evaluation in Grid Connected Photovoltaic Energy Conversion Systems

Cavalcanti, Marcelo C.; Azevedo, Gustavo M. S.; Amaral, B.A.; Oliveira, K. C.; Neves, Francisco A. S.; Lins, Z.D.

doi:10.1109/pesc.2005.1581635

Cited by 23 publications

(11 citation statements)

References 6 publications

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“…The choice of one or another form to connect the PV panels among themselves and to the inverter system will be a determining factor on aspects such as the use of solar radiation, the shading influence or the mismatch losses [17]. Most used PV architectures could be grouped basically in the following four configurations: centralized inverters, string inverters, multi-string inverters and AC modules [18]. Other architectures have been suggested on an experimental basis, but its efficiency has not been proved in real grid tied facilities [19].…”

Section: Pv System Topologiesmentioning

confidence: 99%

Performance of grid-tied PV facilities based on real data in Spain: Central inverter versus string system

Díez-Mediavilla

Dieste-Velasco

Rodríguez-Amigo

et al. 2014

Energy Conversion and Management

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Two complete years of operation of two grid-tied PV facilities is presented. Energetic and economic performance of both installations has been compared. Located in the same place, the installation of these facilities followed the same construction criteria -PV panels, panel support system and wiring-and the facilities are exposed to the same atmospheric temperature and solar radiation. They differ with regard to their inverter topology used: one facility uses a central inverter and the other a string inverter configuration. The performance of the facilities has been determined using a procedure based on a small number of easily obtained parameters and the knowledge of the analyzed system and its operation mode.Electrical losses have been calculated for both systems and a complete comparison between them has been carried out. The results have shown better performance for distributed system in economic and energetic terms.

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Section: Pv System Topologiesmentioning

confidence: 99%

Performance of grid-tied PV facilities based on real data in Spain: Central inverter versus string system

Díez-Mediavilla

Dieste-Velasco

Rodríguez-Amigo

et al. 2014

Energy Conversion and Management

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“…Since the output voltage of the inverter does not vary much, the losses are usually expressed as a quadratic function of power instead of current, such as: P loss = K 0 + K 1 P out + K 2 P 2 out [4]. Conversion losses can be analyzed based on the internal details of the inverter (see for example [5]), but we prefer to take the black-box approach here. Manufacturers usually provide an efficiency profile for a range of power levels which can then be used to estimate the constants in an equation such as the one above.…”

Section: Electrical Conversion Efficiencymentioning

confidence: 99%

A finite state machine model to represent inverters in photovoltaic system simulations

Driesse

Harrison

Jain

2008

2008 IEEE Power Electronics Specialists Conference

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The simulation of Photovoltaic (PV) Power Systems relies on appropriate models of the PV array, power conversion electronics, operating conditions and sometimes, energy storage and loads. This paper presents a model of intermediate complexity for grid-tie inverters that can capture many differences between specific products, yet remains generic enough to be used without expert knowledge of their internal circuits. The core of this model is a finite state machine (FSM) that defines the typical operating modes, or states, of grid-tie inverters and the conditions that lead to transitions from one state to another. Each state also defines parameters related to the transfer of electrical power, such as operating limits, conversion losses and maximum power point tracking efficiency. The increase in inverter temperature resulting from electrical losses is also modeled.

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“…Thus, it is possible the direct connection between the PV array and the 1F-B converter dc-bus ( Figure 1). Hence, the step-up stage is not needed [27], [28], increasing the overall system efficiency [29].…”

Section: Introductionmentioning

confidence: 99%

Single-phase Grid-connected Photovoltaic System With Active Power Line Conditioning

Silva¹,

Campanhol²,

Bacon³

et al. 2015

Eletrônica de Potência

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-This paper deals with an alternative current reference generator algorithm proposition, which is employed to inject active power into the grid and, simultaneously, performs reactive power compensation and load harmonic current suppression in single-phase grid-connected photovoltaic (PV) systems. The PV system reference current is computed based on synchronous reference frame method, which operates in conjunction with the dc-bus controller. In addition, by adopting a proper strategy, it is proposed criteria for establishing the priority on the power compensation by the PV system, in order that the power rating of the gridconnected PWM converter is not exceeded. The Perturband-Observe maximum power point tracking technique is employed to generate the dc-bus voltage reference for extracting the maximum power from the photovoltaic array and, therefore, maximizing its efficiency. Both simulation and experimental results are presented to verify the static and dynamic behaviors of the grid-tied photovoltaic system, as well as evaluate its performance. 1

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Efficiency Evaluation in Grid Connected Photovoltaic Energy Conversion Systems

Cited by 23 publications

References 6 publications

Performance of grid-tied PV facilities based on real data in Spain: Central inverter versus string system

Performance of grid-tied PV facilities based on real data in Spain: Central inverter versus string system

A finite state machine model to represent inverters in photovoltaic system simulations

Single-phase Grid-connected Photovoltaic System With Active Power Line Conditioning

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