Low complexity MPPT technique exploiting the effect of the PV cell series resistance

Scarpa, V.V.R.; Spiazzi, G.; Buso, Simone

doi:10.1109/apec.2008.4522996

Cited by 16 publications

(15 citation statements)

References 13 publications

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“…This may shift the operating point from the MPP. Furthermore, as reported in [6][7][8], the distribution of internal resistances within the PV panels may cause the MPP voltage to increase or decrease for an increase in insolation level. Consequently, the voltage drop caused by the EQSCC may have a positive or a negative effect on the PV's efficiency, depending on the direction of the MPP voltage shift caused by changes in the PV insolation.…”

Section: Simulationsmentioning

confidence: 99%

“…Two groups of solutions have been proposed to remedy the shading problem: solutions that are based on a dedicated converter/inverter per panel [3][4] and those that keep the series connection of the panels, but replenish the lower current of the shaded panel(s) with parallel feedback circuitry [5][6][7]. The parallel circuitry approach can be simplified by taking advantage of the following two facts: the panels' voltages at the MPP are close for different insolation levels and the MPP voltage has a rather broad peak so that small deviations from it have a minimal effect on the power output [8]. Hence, the parallel circuitry only needs to equalize the panels' voltages, while the global MPPT can be carried out by a central inverter, which is fed by the string of the PV panels [6].…”

Section: Introductionmentioning

confidence: 99%

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Design and evaluation of a modular resonant switched capacitors equalizer for PV panels

Ben‐Yaakov

Blumenfeld

Cervera

et al. 2012

2012 IEEE Energy Conversion Congress and Exposition (ECCE)

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Abstract-A switched-capacitor based equalization scheme is proposed for overcoming the adverse effect of shaded panels in a serially connected PV array. The proposed solution is based on a modular approach, in which each two panels are connected to a resonant switched-capacitor converter. The distribution of currents and power extraction improvement have been derived and verified experimentally and design guidelines to meet desired power loss level requirements have been developed. The experimental equalizing module was designed for 185W PV panels and was found to boost the maximum available power by about 50% when interfaced with two serially connected PV panels under insolation ratios between 20% and 100%. The analytical, simulation and experimental results suggest that the proposed approach is effective in extracting all available power with relatively high efficiency.

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Section: Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and evaluation of a modular resonant switched capacitors equalizer for PV panels

Ben‐Yaakov

Blumenfeld

Cervera

et al. 2012

2012 IEEE Energy Conversion Congress and Exposition (ECCE)

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“…3 assumes that the MPP voltage increases with irradiance, which is valid in most of the cases. However, in some cases, due to the panel series resistance at high irradiation levels, the MPP voltage could decrease with irradiation [15].…”

Section: B Optimized Dp -Pando During Rapidly Changing Irradiationmentioning

confidence: 99%

Optimized Maximum Power Point Tracker for Fast-Changing Environmental Conditions

Séra

Teodorescu

Hantschel

et al. 2008

IEEE Trans. Ind. Electron.

382

109

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Abstract-This paper presents a high-performance maximum power point tracker (MPPT) optimized for fast cloudy conditions, e.g., rapidly changing irradiation on the photovoltaic panels. The rapidly changing conditions are tracked by an optimized hillclimbing MPPT method called dP -P&O. This algorithm separates the effects of the irradiation change from the effect of the tracker's perturbation and uses this information to optimize the tracking according to the irradiation change. The knowledge of the direction of the irradiation change enables the MPPT to use different optimized tracking schemes for the different cases of increasing, decreasing, or steady irradiance. When the irradiance is changing rapidly this strategy leads to faster and better tracking, while in steady-state conditions it leads to lower oscillations around the MPP. The simulations and experimental results show that the proposed dP -P&O MPPT provides a quick and accurate tracking even in very fast changing environmental conditions.

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“…Several single and three-phase converters exhibit appropriate input characteristic to present Behavior Matching [45,50,94,[97][98][99][100][101]. In the case of SRC3, the input characteristic curve is a straight line with a small inclination.…”

Section: Behavior Matching and The Mppt Proposal Techniquementioning

confidence: 99%

“…e indirect MPPT is a type of tracking that uses the connection between measured variables and the position of the maximum power operating point (MPOP [84][85][86][87][88][89][90][91][92][93][94][95].…”

Section: Behavior Matching and The Mppt Proposal Techniquementioning

confidence: 99%

Analysis of a Three-Phase Grid-Connected PV Power System Using a Modified Dual-Stage Inverter

Martins

2013

ISRN Renewable Energy

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is paper presents a grid-connected PV system in a centralized con�guration constructed through a three-phase dual-stage inverter. For the DC-DC stage the three-phase series resonant converter is chosen thanks to the advantages that it exhibits. However, it is inadequate for the accomplishment of MPPT, due to its efficiency strongly depending on the implemented deadtime and switching frequency. en, this paper proposes a conceptual modi�cation, that is, a modi�ed dual-stage inverter in which the inverter stage is responsible for both the MPPT and the grid-current control. In addition, the DC-DC converter operates with constant duty cycle and frequency. Such con�guration requires a new concept, introduced as Behavior Matching. It serves as a fundamental feature for the DC-DC converter to reproduce the PV array I-V characteristic when they are connected, without control action. e maximum power operating point is found by maximizing the direct axis current, obtained by Park's transformation from the inverter, through the perturbation and observation algorithm. Any speci�c measurement to realize the MPPT is needed. e galvanic isolation is achieved by using a high-frequency transformer. e structure is appropriate for high power applications, above 10 kW.

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Low complexity MPPT technique exploiting the effect of the PV cell series resistance

Cited by 16 publications

References 13 publications

Design and evaluation of a modular resonant switched capacitors equalizer for PV panels

Design and evaluation of a modular resonant switched capacitors equalizer for PV panels

Optimized Maximum Power Point Tracker for Fast-Changing Environmental Conditions

Analysis of a Three-Phase Grid-Connected PV Power System Using a Modified Dual-Stage Inverter

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