A MPPT Circuit With 25 $\mu\text{W}$ Power Consumption and 99.7% Tracking Efficiency for PV Systems

Abdelmoaty, Ahmed; Al-Shyoukh, Mohammad; Hsu, Yi Chiung; Fayed, Ayman

doi:10.1109/tcsi.2016.2604224

Cited by 23 publications

(8 citation statements)

References 13 publications

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“…Maximum Power Point Tracking (MPPT) techniques used to be avoided in ultra-low power applications, as the power needed to operate was comparable to the available ambient energy [11,12]. Nowadays, efficient MPPT solutions consuming only a few uW of power are available [13]. Perturb and Observe (P&O), is the most widely used MPPT method for low power harvesting, as it can be implemented with very low power consumption [14].…”

Section: Introductionmentioning

confidence: 99%

73.5 uW Indoor-Outdoor Light Harvesting System with Global Maximum Power Point Tracking

Kozalakis

Sofianidis

Konstantakos

et al. 2021

JLPEA

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This manuscript introduces a light harvesting system with battery management. In contrast to relevant solutions that operate in limited ranges, the proposed system covers a wide operating input power range from 10 uW up to 300 mW. Specifically, experimental results highlight that, combined with a 73 × 94 mm flexible light harvester, it can harness light in a range from 50 LUX (indoor lighting) up to 120,000 LUX (outdoor lighting). The introduced system consists of a boost converter and an ultra-low power microcontroller (MCU). The MCU performs Global Maximum Power Point Tracking (GMPPT), using a resistor-free time-based input power sensing method, to calculate the input power of the converter, which does not interfere with the operation of the boost converter. The efficiency of the GMPPT system was evaluated with detailed experimentation, where we achieved 99.75% average GMPPT tracking efficiency while consuming only 73.5 uW at 4.2 V.

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Section: Introductionmentioning

confidence: 99%

73.5 uW Indoor-Outdoor Light Harvesting System with Global Maximum Power Point Tracking

Kozalakis

Sofianidis

Konstantakos

et al. 2021

JLPEA

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“…This technique limits the maximum reverse voltage across the hot-spotted or shaded solar cells, therefore increases the overall short circuit current and the open circuit voltage [11] - [13]. However, this method of mitigating hot-spots is not considered favorable, since it requires additional costs and can even be detrimental in terms of power dissipation caused by additional bypass diodes [14].…”

Section: Introductionmentioning

confidence: 99%

70% Decrease of Hot-Spotted Photovoltaic Modules Output Power Loss Using Novel MPPT Algorithm

Dhimish

2019

IEEE Trans. Circuits Syst. II

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The phenomenon of 'Hot-spotting' within photovoltaic (PV) panels, where a mismatched cell/cells heats up, leads to reliability and efficiency issues. In this paper, a novel maximum power point tracking (MPPT) algorithm is developed to compensate for hot-spotted PV module effects, thus increasing the output power and improving reliability. The MPPT algorithm implements two mitigation processes; the first to identify the optimum power-voltage (P-V) curve to track the global maximum power point (GMPP). The second process is to manipulate the output power towards the GMPP through the control of the perturbation step size. In order to verify the appropriateness of the proposed algorithm, multiple hot-spotted PV modules were tested under various environmental conditions. Significantly, the algorithm reduces the hot-spotted PV modules output power loss by at least 70% under all irradiance transition scenarios, slow, medium, and fast.

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“…Among them, the FOCV method is preferred for low power application since maximum power point (MPP) can be simply found by using linear relationship between open circuit voltage, V OC and MPP voltage, V MPP of the EHD [8,9,10,11,12,13]. Since the V MPP varies depending on temperature, pressure, or light intensity in energy harvesting application [14,15,16,17,18,19], the V OC is periodically sampled for V MPP calculation after the EHD is unloaded by shutting down the PMU. In order to apply the FOCV for boost converter, as illustrated in Fig.…”

Section: Introductionmentioning

confidence: 99%

A fast maximum power point tracking boost converter with 80 ns sampling and tracking time for energy harvesting application

Lee

Jeong

2019

IEICE Electron. Express

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In this letter, a continuous conduction mode boost converter with fast and efficient maximum power point tracking (MPPT) is presented for energy harvesting application. A novel current conservation technique is utilized to sample open-circuit voltage of energy harvesting device without any unnecessary power loss during MPPT operation. Fabricated in 0.35 µm CMOS process, the proposed converter achieves a sampling and tracking time of 80 ns for MPPT. Also, the converter has a peak tracking efficiency of 97.2% and a peak power conversion efficiency of 84.8% with 3-V output voltage.

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A MPPT Circuit With 25 $\mu\text{W}$ Power Consumption and 99.7% Tracking Efficiency for PV Systems

Cited by 23 publications

References 13 publications

73.5 uW Indoor-Outdoor Light Harvesting System with Global Maximum Power Point Tracking

73.5 uW Indoor-Outdoor Light Harvesting System with Global Maximum Power Point Tracking

70% Decrease of Hot-Spotted Photovoltaic Modules Output Power Loss Using Novel MPPT Algorithm

A fast maximum power point tracking boost converter with 80 ns sampling and tracking time for energy harvesting application

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