On a hybrid MPPT control scheme to improve energy harvesting performance of traditional two-stage inverters used in photovoltaic systems

Jiang, Joe‐Air; Su, Yu; Kuo, Kun Chang; Wang, Chien Hao; Liao, Min Sheng; Wang, Jen Cheng; Huang, Chen-Kang; Chou, Cheng‐Ying; Lee, Chien Hsing; Shieh, Jyh Cherng

doi:10.1016/j.rser.2016.09.112

Cited by 20 publications

(9 citation statements)

References 42 publications

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“…The coupling factor essentially describes the quality of the MPPT where 100% represents ideal trackingthe situation when the working point coincides with the MPP of the solar cell. It is common for high-quality MPPT devices to provide coupling or tracking efficiency very close to 100%. , In this study, the coupling factor peaked at 92.4% in the beginning and declined to 87.3% at the end of the charge phase. The decrease could be due to the increased voltage step up, in which more power is needed to convert current into voltage.…”

Section: Resultsmentioning

confidence: 70%

Toward the Integration of a Silicon/Graphite Anode-Based Lithium-Ion Battery in Photovoltaic Charging Battery Systems

et al. 2022

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Solar photovoltaic (PV) energy generation is highly dependent on weather conditions and only applicable when the sun is shining during the daytime, leading to a mismatch between demand and supply. Merging PVs with battery storage is the straightforward route to counteract the intermittent nature of solar generation. Capacity (or energy density), overall efficiency, and stability at elevated temperatures are among key battery performance metrics for an integrated PV–battery system. The performance of high-capacity silicon (Si)/graphite (Gr) anode and LiNi 0.6 Mn 0.2 Co 0.2 O 2 (NMC622) cathode cells at room temperature, 45, and 60 °C working temperatures for PV modules are explored. The electrochemical performance of both half and full cells are tested using a specially formulated electrolyte, 1 M LiPF 6 in ethylene carbonate: diethyl carbonate, with 5 wt % fluoroethylene carbonate, 2 wt % vinylene carbonate, and 1 wt % (2-cyanoethyl)triethoxysilane. To demonstrate solar charging, perovskite solar cells (PSCs) are coupled to the developed batteries, following the evaluation of each device. An overall efficiency of 8.74% under standard PV test conditions is obtained for the PSC charged lithium-ion battery via the direct-current–direct-current converter, showing the promising applicability of silicon/graphite-based anodes in the PV–battery integrated system.

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Section: Resultsmentioning

confidence: 70%

Toward the Integration of a Silicon/Graphite Anode-Based Lithium-Ion Battery in Photovoltaic Charging Battery Systems

et al. 2022

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“…The study presents an understanding on the aspects that should be well-thought-out while selecting a suitable technique for a specific application. The performances and the anomalies related with several stage inverter architectures used for the prevalent MPPT techniques have been investigated in (Jiang et al, 2017). A new modified MPPT algorithm has been carried out to instantly trace the unique point of the Photo-voltaic arrays.…”

Section: Introductionmentioning

confidence: 99%

An Advanced MPPT Scheme for Standalone Solar powered PV System using Neuro-Fuzzy Estimator based on measured data

Naceur

Saidi

Bhutto³

et al. 2021

JER is an international, peer-reviewed journal that publishes f

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This paper deals with the problem of the optimization of the power, delivered by the photovoltaic panel (PVP). To achieve this aim, a neuro-fuzzy estimator (NFE), followed by a conversion coefficient and a calculation stage of the optimal duty cycle, has been developed. The NFE is used to calculate the open circuit voltage corresponding to each solar radiation, based only on the standard open circuit voltage. A coefficient, determining for each climatic condition the voltage of the maximum power directly from the open circuit voltage, is estimated by a measured test. Finally, the optimal duty cycles, next, determined by the input/output equation of boost converter. The system performance, under different scenarios, has been checked carrying out MATLAB simulations, using an existing photovoltaic model and real weather data, and comparing the simulation results with the measured one. The results demonstrate the effectiveness of the present approach. The efficiency of the proposal maximum power point tracking (MPPT) is proved and it showed that this controller can generate almost 99% of the real PVP maximum power.

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“…Apart from the above issues, the system structure and its model, adjustment of maximum power point tracking (MPPT), active or reactive power control, system fault tolerance, and so forth have received much attention. [35][36][37][38] Thorough studies of the grid-connected PV inverter systems and overview of models and control of the single-phase inverters have been presented in recent years, but the common-mode leakage current (I CM ) removal techniques have not been well evaluated especially for the transformer-less PV-connected inverters. In Section 2, the mechanism of generating and eliminating the leakage current of common-states is investigated.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An FPGA‐based switching photovoltaic‐connected inverter topology for leakage current suppression in grid‐connected utilizations

Ghaderi

2020

Circuit Theory & Apps

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This study presents a symmetrical photovoltaic (PV)-connected inverter topology for eliminating the common-state leakage current in grid-connected inverters. A new inverter topology is introduced that minimizes the leakage current, increases efficiency, and is economically viable because it consists of six power switches and two power diodes that, compared with similar ones, consist of the same element numbers. In this inverter, power losses are lower than popular topologies such as H5, H6, and HERIC, and the voltage stresses of the switches are reduced. These features are due to the unique composition of the inverter branches and the location of the switches and diodes and the formation of a suitable freewheeling path for the current. The freewheeling path separates the alternating current (AC) side from the direct current side in the converter and cuts off the PV array leakage current to the AC grid. This will improve network reliability indices and maintain conservation standards. Finally, the content of this method is validated by comparing the proposed inverter with the existing conventional topologies. A prototype has been implemented for the performance analysis of the proposed inverter and results presented.

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On a hybrid MPPT control scheme to improve energy harvesting performance of traditional two-stage inverters used in photovoltaic systems

Cited by 20 publications

References 42 publications

Toward the Integration of a Silicon/Graphite Anode-Based Lithium-Ion Battery in Photovoltaic Charging Battery Systems

Toward the Integration of a Silicon/Graphite Anode-Based Lithium-Ion Battery in Photovoltaic Charging Battery Systems

An Advanced MPPT Scheme for Standalone Solar powered PV System using Neuro-Fuzzy Estimator based on measured data

An FPGA‐based switching photovoltaic‐connected inverter topology for leakage current suppression in grid‐connected utilizations

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