A maximum power point tracker variable-dc-link three-phase inverter for grid-connected PV panels

Mancilla–David, Fernando; Arancibia, Arnaldo; Fulginei, Francesco Riganti; Muljadi, Eduard; Cerroni, M

doi:10.1109/isgteurope.2012.6465892

Cited by 13 publications

(4 citation statements)

References 17 publications

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“…Applications of multilevel inverters range from medium to high voltage and comprise power distribution, motor drives, etc. [23]. For a given application, the choice of appropriate multilevel topology and its control scheme is not well defined and depends on various engineering compromises [13].…”

Section: Introductionmentioning

confidence: 99%

A Grid-Tied Fuel Cell Multilevel Inverter with Low Harmonic Distortions

2021

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As a result of global energy demand increase, concerns over global warming, and rapid exhaustion of fossil fuels, there is a growing interest in energy system dependence on clean and sustainable energy resources. Attractive power technologies include photovoltaic panels, wind turbines, and biomass power. Fuel cells are also clean energy units that substitute power generators based on fossil fuels. They are employed in various applications, including transportation, stationary power, and small portable power. Fuel cell connections to utility grids require that the power conditioning units, interfacing the fuel cells and the grids, operate accordingly (by complying with the grid requirements). This study aims to model a centralised, single-stage grid-tied three-level diode clamped inverter interfacing a multi-stack fuel cell system. The inverter is expected to produce harmonic distortions of less than 0.5% and achieve an efficiency of 85%. Besides the grid, the system consists of a 1.54 MW/1400 V DC proton exchange membrane fuel cell, a 1.3 MW three-level diode clamped inverter with a nominal voltage of 600 V, and an inductance-capacitance-inductance (LCL) filter. Two case studies based on the load conditions are considered to assess the developed system’s performance further. In case 1, the fuel cell system generates enough power to fully meet this load and exports the excess to the grid. In the other case, a load of 2.5 MW was connected at the grid-tied fuel cell inverter’s output terminals. The system imports the grid’s power to meet the 2.5 MW load since the fuel cell can only produce 1.54 MW. It is demonstrated that the system can supply and also receive power from the grid. The results show the developed system’s good performance with a low total harmonic distortion of about 0.12% for the voltage and 0.07% for the current. The results also reveal that the fuel cell inverter voltage and the frequency at the point of common coupling comply with the grid requirements.

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Section: Introductionmentioning

confidence: 99%

A Grid-Tied Fuel Cell Multilevel Inverter with Low Harmonic Distortions

2021

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“…Multilevel inverters (MLIs) may also be utilized in medium to high voltage applications, such as power distribution, motor drives, etc. (Mancilla-David et al, 2012). However, several design trade-offs govern the decision on the type of MLI structure and the suitable control scheme to be used (Marx et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

A grid-tied PV-fuel cell multilevel inverter under PQ open-loop control scheme

et al. 2022

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Power generating entities’ connection to utility grids requires power converters to achieve high efficiency and low injected current harmonic distortion. The control of the power converter plays a crucial role in the grid-tied power converter’s performance. Various control techniques for grid-tied inverters ranging from classical to intelligent are introduced in several exist. Evaluating the current state and trend in grid-tied power inverters and related control methods, research shows that most works in this area focus on grid integration using the close-loop and other advanced control approaches. This is because these control methods are preferred since they provide adequate performance in case of uncertainties in the system. This investigation can aprove that PQ open-loop control technique can operate sufficiently and cost-effectively in grid-tied renewable and alternative power systems under normal operating conditions. Hence, this paper aims to assess the performance of a centralized single-stage grid-tied three-level diode clamped inverter connected to a PV-Fuel cell unit. An active and reactive power open-loop control scheme is employed to operate the inverter and achieves a current harmonic distortion below 5%. The system comprises a 150 kW/700 V PV, a 150 kW/1400 V fuel cell, a 265 kW multilevel inverter operating at a rated voltage of 415 V, and an LCL filter. Two operating scenarios are adopted to investigate the system’s responses further. In the first scenario, a local load of 509.2 kW is supplied from the PV-fuel cell inverter. The load also receives the grid’s power to meet the demand as the PV-fuel cell inverter provides only 265 kW. Whereas in the other scenario, the PV-fuel cell unit provides power to supply a local load while transporting the surplus to the grid. The results reveal the developed model’s good performance with a current harmonic distortion of 0.33%.

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“…Examples of these methods include the perturb & observe (P&O) and incremental conductance algorithms [5]- [9]. These methods are not flawless: they may oscillate around the MPP and can fail under rapidly changing irradiance conditions [6]. In order to overcome these limitations, several methods have been recently proposed based on neural networks (NN) [10]- [12] and on approximate solutions of the current-voltage (I-V ) curves [13], [14].…”

Section: Introductionmentioning

confidence: 99%

Two FPGA-Oriented High-Speed Irradiance Virtual Sensors for Photovoltaic Plants

Oliveri

Cassottana

Laudani

et al. 2017

IEEE Trans. Ind. Inf.

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Knowing solar irradiance value allows an optimized management of photovoltaic (PV) power plants in terms of produced energy. Unfortunately, although sensing temperature is easy, the measurement of solar irradiance is expensive. In this paper two circuit architectures for the estimation of the solar irradiance based on simple measurements are proposed. They are thought to be part of a centralized system implemented on FPGA (Field Programmable Gate Array) for sensing and monitoring of solar irradiance in a whole PV plant. The FPGA centralized architecture could allow for a real time irradiance mapping by exploiting information coming from several low-cost measuring circuits suitably allocated on the PV modules. Validations on real irradiance data collected by the U.S. Department of Energy's National Renewable Energy Laboratory are presented.

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A maximum power point tracker variable-dc-link three-phase inverter for grid-connected PV panels

Cited by 13 publications

References 17 publications

A Grid-Tied Fuel Cell Multilevel Inverter with Low Harmonic Distortions

A Grid-Tied Fuel Cell Multilevel Inverter with Low Harmonic Distortions

A grid-tied PV-fuel cell multilevel inverter under PQ open-loop control scheme

Two FPGA-Oriented High-Speed Irradiance Virtual Sensors for Photovoltaic Plants

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