Direct MPPT Algorithm for PV Sources With Only Voltage Measurements

Dallago, E.; Liberale, Alessandro; Miotti, Davide; Venchi, G.

doi:10.1109/tpel.2015.2389194

Cited by 55 publications

(23 citation statements)

References 33 publications

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“…This approach is less complex than the former, reducing the power consumption at the cost of less accuracy in the MPPT. Some examples of the open-loop approach are the algorithm proposed in [25] or the fractional open circuit voltage method (FOCV) [15], [26]. The latter consists of measuring the open circuit harvested voltage either by disconnecting the main transducer from the PMU and thus decreasing the PMU input power, or by using a pilot transducer, resulting in a larger form factor, with the goal of modifying the PMU input impedance to match photodiode and PMU impedances.…”

Section: Introductionmentioning

confidence: 99%

Micro-Energy Harvesting System Including a PMU and a Solar Cell on the Same Substrate With Cold Startup From 2.38 nW and Input Power Range up to 10 $\mu$W Using Continuous MPPT

Ferro

Brea

López

et al. 2019

IEEE Trans. Power Electron.

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This paper presents a Power Management Unit (PMU) powered by a 1 mm 2 solar cell on the same substrate to rise up the harvested voltage above 1.1 V. The on-chip solar cell and the PMU are fabricated in standard 0.18 μm CMOS technology achieving a form factor of 1.575 mm 2. The PMU is able to start up from a harvested power of 2.38 nW without any external kick off or control signal. The PMU features a continuous and two-dimensional Maximum Power Point Tracking (MPPT) working in open-loop mode to handle a harvested power range from nW to μW, by modifying both the charge pump topology and the switching frequency. The MPPT is based on four voltage level detectors that define five working regions depending on the illumination and on a self-tuning reference current for a fine adjustment of the switching frequency. The chip also includes an auxiliary charge pump to generate the voltage level necessary for the control circuit, implemented as a Pelliconi charge pump of 8 stages with NMOS transistors in Pwell as diodes. A Dickson charge pump with transmission gates as switches and with variable gain and capacitance per stage is also designed as the main charge pump. Finally, two relaxation oscillators are implemented to drive both charge pumps. This paper is accompanied by a video file demonstrating the PMU operation by powering an off-chip NAND gate.

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Section: Introductionmentioning

confidence: 99%

Micro-Energy Harvesting System Including a PMU and a Solar Cell on the Same Substrate With Cold Startup From 2.38 nW and Input Power Range up to 10 $\mu$W Using Continuous MPPT

Ferro

Brea

López

et al. 2019

IEEE Trans. Power Electron.

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“…The MPP is determined by nullifying the difference of the panel average power in two consecutive time intervals within a given time. In [42], a double capacitor interface (DCI) converter was used to track the MPP by varying the DC Link voltage of the inverter. In [43], an improved linear sinusoidal tracer (ILST) control algorithm has been.…”

Section: Fractional Open Circuit Voltagementioning

confidence: 99%

Photovoltaic MPPT Techniques Comparative Review

Lawan

Aboushady

Ahmed

2020

2020 9th International Conference on Renewable Energy Research and Application (ICRERA)

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This paper critically reviews some of the most recent maximum power point tracking (MPPT) techniques developed. It outlines the methods proposed in the papers published. The different techniques are grouped for compa following groups: Direct and indirect power point tracking, artificial intelligence tracking techniques and other developed methods. The paper also critically summarises the findings in terms of dynamic performance in maximum power extraction.

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“…The common MPPT technique and the simple one is Perturb and Observe (P&O) technique. It has high efficiency and does not require tunning parameters periodicly [3]. P&O is a very simple technique because it does not require knowledge of the curves of solar panel characteristics [4].…”

Section: A Varying Irradiance Levels and Mppt On Pv Systemmentioning

confidence: 99%

Quasi Z-Source Inverter as MPPT on Renewable Energy using Grey Wolf Technique

Sias¹,

Fadlika²,

Wahyono³

et al. 2019

EECSI

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Z-Source Inverter (ZSI) is famous power converter who has capability to deal with voltage sags, improved power factor and wide voltage range of output. Quasi Z Source Inverter (QZSI) is the modern ZSI who has continuous current of input and can reduce stress of the passive component. This paper proposes simple boost QZSI circuit as Maximum Power Point Tracking (MPPT) using Grey Wolf Optimization (GWO) algorithm in photovoltaic system. Grey Wolf algorithm has been compared with the Perturb and Observed (P&O) technique for gaining the maximum power from the sun. Both techniques can get the optimum power of solar panel not only at constant sun light condition but also under varying irradiance levels. The value of average power obtained from GWO technique is greater than P&O. Although the value of solar radiation changes, the output voltage remains stable and both algorithms carry on obtaining optimal power of the sun.

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Direct MPPT Algorithm for PV Sources With Only Voltage Measurements

Cited by 55 publications

References 33 publications

Micro-Energy Harvesting System Including a PMU and a Solar Cell on the Same Substrate With Cold Startup From 2.38 nW and Input Power Range up to 10 $\mu$W Using Continuous MPPT

Micro-Energy Harvesting System Including a PMU and a Solar Cell on the Same Substrate With Cold Startup From 2.38 nW and Input Power Range up to 10 $\mu$W Using Continuous MPPT

Photovoltaic MPPT Techniques Comparative Review

Quasi Z-Source Inverter as MPPT on Renewable Energy using Grey Wolf Technique

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