Optimization of a photovoltaic system connected to electric power grid

Albuquerque, Fabio Lima de; Moraes, A.J.; Guimarães, Geraldo Caixeta; Sanhueza, Sérgio Manuel Rivera; Vaz, Alexandre Rodrigues

doi:10.1109/tdc.2004.1432455

Cited by 9 publications

(5 citation statements)

References 5 publications

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“…Photovoltaic technology provides an attractive method of power generation and meets the criteria of clean energy and sustainability [1]- [4]. Advanced research is still in progress to increase the efficiency of photovoltaic cells and optimize the production of energy through minimization of power losses and better utilization of incident solar irradiance [5]. The efficiency and proper operation of photovoltaic systems depends on a number of factors.…”

Section: Introductionmentioning

confidence: 99%

The effect of Solar irradiance on the power quality behaviour of grid connected photovoltaic systems

Patsalides¹,

Evagorou²,

Makrides³

et al. 2024

RE&PQJ

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Photovoltaic systems have been increasingly used in the generation of electrical energy, either as a means of providing electricity in areas where there is no grid connection (stand alone systems), or by providing electricity to the grid (grid connected systems). In a deregulated energy market, the cost of energy produced from fossil fuels is rising and the photovoltaic energy becomes a promising alternative source. Yet it still suffers from problems that need to be resolved in order to be widely accepted as an equivalent alternative to fossil fuels. Firstly the more direct problem of efficiency and cost needs to be overcome and secondly the indirect problem of the quality of power provided by photovoltaic technology has to be addressed. In this work 14 different grid connected PV systems have been considered and power quality measurements have been taken. Results for low and average irradiance cases are presented and analyzed in order to determine how power quality quantities are affected by changes in solar irradiance.

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Section: Introductionmentioning

confidence: 99%

The effect of Solar irradiance on the power quality behaviour of grid connected photovoltaic systems

Patsalides¹,

Evagorou²,

Makrides³

et al. 2024

RE&PQJ

View full text Add to dashboard Cite

show abstract

“…Secondly, since the inverter is running excessive harmoniccurrents injected into the grid, the power system harmonicpollution problem is getting worse. Grid system becomesabnormal and false, and another equipment is also adverselyaffected, so various control strategy is proposed to solve this problem; power controlled [9], current controlled grid connected PV system [10] andhysteresis current control [11].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Control Design for Maximum Power Point Tracking and Unity Power Factor of a Grid-Connected Photovoltaic Renewable EnergySystems

Guisser¹,

Aboulfatah²,

Abdelmounim³

et al. 2014

IOSRJECE

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“…The inverter is the key-component for successful operation of the grid connected PV system. It utilize various control strategy; power controlled [10], current controlled grid connected PV system [11].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Observer-Based Control for Grid Connected Photovoltaic System

Guisser¹,

Abdelmounim²,

Aboulfatah³

et al. 2014

IOSRJEEE

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A new nonlinear observer-based controlscheme for a single-phase photovoltaic (PV) systemconnected to the grid is presented.The system consists of a PV array, DC-DC Boost converter and a DC-AC inverter coupled to grid network. The DC-DCconverter is used to extract maximum power from the PV array and the DC-AC inverter is used to synchronize a sinusoidal currentoutput with a voltage gridwith regulated DC bus voltage. A robust nonlinear controller isdeveloped using the sliding mode control design technique based on anaveraged nonlinear model of the whole controlled system. The control action is carried out assuming that all the states of the grid connected PV system are known by measurement. Then, a nonlinear stateobserver for Boost inductor current, DC bus voltage and grid injected current estimation is implemented from the measurementof PV array voltage state, PV array current signal and grid voltage signal. Theobserver-based control method provides robust maximum power point tracking (MPPT), grid current trackingand DC bus voltage regulation, achieves unity power factor and optimizes the PV energy extraction suitable for grid connected PV systems. Simulation results are provided to demonstrate the effectiveness of the proposed design and robustness under different operating conditions such as changes in atmospheric conditions and noise measurements.

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Optimization of a photovoltaic system connected to electric power grid

Cited by 9 publications

References 5 publications

The effect of Solar irradiance on the power quality behaviour of grid connected photovoltaic systems

The effect of Solar irradiance on the power quality behaviour of grid connected photovoltaic systems

Nonlinear Control Design for Maximum Power Point Tracking and Unity Power Factor of a Grid-Connected Photovoltaic Renewable EnergySystems

Nonlinear Observer-Based Control for Grid Connected Photovoltaic System

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