A novel analog maximum power point tracker for low‐cost and low‐power distributed PV systems

Cao, Guoen; Kim, Hee‐Jun

doi:10.1002/tee.22108

Cited by 8 publications

(6 citation statements)

References 14 publications

(14 reference statements)

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“…To compare our results to the efficiencies of MPPTs, the results from the literature [ 20–23,27,28 ] are presented in Figure 1b (red points). The MPPT performance can be summarized in two efficiencies: tracking efficiency and power efficiency.…”

Section: Resultsmentioning

confidence: 99%

“…Power coupling under these variable conditions is usually achieved using maximum power point trackers (MPPTs)-devices combining DC-DC converter capability with MPPT logic. [20][21][22][23][24][25][26][27][28][29] It provides dynamic power coupling-matching of the current characteristic resistance of the battery to the input resistance of energy storage and load. This approach ensures flexibility in component selection as well as stability under variable conditions.…”

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confidence: 99%

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Efficient Power Coupling in Directly Connected Photovoltaic‐Battery Module

et al. 2022

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The natural temporal mismatch between solar electricity generation and consumption necessitates the use of energy storage to stabilize "green" electricity supply. Integration of photovoltaic (PV) devices with energy storage has been widely discussed for different operation scenarios from large-scale installations to low-power indoor devices. At the same time, various energy storage technologies from batteries [1][2][3][4][5][6][7][8][9][10][11] and supercapacitors [11][12][13] to energy storage by water splitting [14][15][16] and water pumping [17] can be used. Any combination of PV and suggested energy storage technologies requires power coupling. To utilize the full power generation potential of a PV module, it must operate at the maximum power point (MPP) of its currentvoltage (I-V ) curve. The shape of the I-V curve and position of the MPP depend on the technology and PV module design and strongly depend on irradiance [18] and temperature, [19] which are both constantly changing in real-world applications. At the same time, the combined I-V curve of the devices connected to the PV module plays an equally important role. This I-V changes with variance of consumption rate and battery state of charge (SoC). Power coupling under these variable conditions is usually achieved using maximum power point trackers (MPPTs)-devices combining DC-DC converter capability with MPPT logic. [20][21][22][23][24][25][26][27][28][29] It provides dynamic power coupling-matching of the current characteristic resistance of the battery to the input resistance of energy storage and load. This approach ensures flexibility in component selection as well as stability under variable conditions. On the other hand, adding an MPPT means additional cost, power overhead due to self-consumption, reduced reliability, and increased maintenance efforts for a PV system.In contrast, a direct PV-to-battery connection can be a simple and cost-effective alternative. Even though there is no active MPP tracking in this simplified case, the concept is of interest because the domain of the battery operating points and the domain of MPPs of a PV module can overlap very closely. [30,31] The feasibility of direct power matching was previously investigated. [1,5,[30][31][32][33][34][35][36][37] Although a directly coupled solution requires careful preselection of the PV and battery components, [1,5,33,34,[37][38][39][40] the PV-battery device can potentially achieve high coupling factor over a significant range of irradiance

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Efficient Power Coupling in Directly Connected Photovoltaic‐Battery Module

et al. 2022

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“…To obtain the maximum energy yield, the best way is to use solar tracking systems. However, tracking systems have high defect rates which will add overhead and additional complexity of PV station, and need energy for their operation [27,28]. Thus, regular adjustment of tilt angle of PV modules is considered.…”

Section: Half-yearly Optimal Tilt Anglementioning

confidence: 99%

Evaluation index system for photovoltaic systems statistical characteristics under hazy weather conditions in central China

Shi

et al. 2017

IET Renewable Power Generation

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This study investigates different methods of determining the optimum tilt angle (OTA) for photovoltaic (PV) systems to maximise energy yield, and provides an evaluation index system for the static and dynamic performance of PV systems under hazy weather conditions, in view of the nature of solar energy resource and PV energy yield. Due to the fact that the data of total solar radiation on inclined surface in Wuhan is not available and PV power generation is non-linear process, an experimental off-grid PV system with various tilt angles and orientations is established which is located in Hubei Meteorological Administration in Wuhan. The experimental system is then used to analyse the accuracy of five in-plane solar radiation models and the relationship between the model predicted errors and meteorological environmental factors, explore the calculated and measured OTA of PV modules and evaluate the performance of PV system with different tilt angles and orientations based on static and dynamic indexes in real atmosphere condition. Finally, the influence of dust on PV energy production has been reported. After cleaning, the energy yield of PV models can increase by 10-20%.

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“…In the MPPT circuits used in solar cars, the digitally controlled MPPT circuits require very accurate analog to digital converters and high‐speed microcomputers, which are not suitable for solar cars because of issues in control stability and power consumption of the control circuits. An MPPT control circuit that uses analog circuits is reported to be a superior method [10–13]. Analog control circuits feature high processing speed and freedom from quantization errors.…”

Section: Introductionmentioning

confidence: 99%

Buck‐Boost‐Type MPPT Circuit Suitable for Vehicle‐Mounted Photovoltaic Power Generation

Kano

Kasai

Kimura

et al. 2021

IEEJ Transactions Elec Engng

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This paper presents a buck–boost maximum power point tracking (MPPT) circuit suitable for solar cars. The MPPT controller, which consists of analog elements with a small number of complementary metal–oxide–semiconductor elements, achieved accurate tracking of the maximum power point of photovoltaic power generation and contributed to the power savings and weight reduction. A buck–boost dc–dc converter was adopted as the main power converter of the MPPT circuit to reduce the power‐conversion loss due to the wide voltage change in the battery. The 12 proposed MPPT circuits were installed in a solar car called ‘2019 Tokai Challenger’ at an international convention and were shown to successfully generate sufficient solar power. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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A novel analog maximum power point tracker for low‐cost and low‐power distributed PV systems

Cited by 8 publications

References 14 publications

Efficient Power Coupling in Directly Connected Photovoltaic‐Battery Module

Efficient Power Coupling in Directly Connected Photovoltaic‐Battery Module

Evaluation index system for photovoltaic systems statistical characteristics under hazy weather conditions in central China

Buck‐Boost‐Type MPPT Circuit Suitable for Vehicle‐Mounted Photovoltaic Power Generation

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