A high step-up DC/DC converter for PV panel application

This paper presents a non‐isolated high step‐up buck–boost with a coupled inductor DC–DC converter relevant for distributed photovoltaic (PV) generation systems. The proposed topology can reach high voltage gain through the combination of a buck–boost converter with a coupled inductor. The configuration of the proposed converter allows to achieve a natural voltage clamp circuit for the switch, recovering the energy stored in the leakage inductance of the coupled inductor. Moreover, the converter allows soft‐switching conditions, that is, Zero Current Switching (ZCS) for the diodes and nearly ZCS for the active switch. Also, the proposed converter presents a low component count and common ground connection of the input and output. The proposed converter is evaluated theoretically by the principle of operation in continuous‐conduction mode (CCM) and discontinuous‐conduction mode (DCM), voltage gain derivation, external characteristics, semiconductor voltage stress, current stress, and design guidelines. Finally, a 650‐W, 36/380‐V, 50‐kHz prototype was built in the laboratory to experimentally evaluate the proposed converter, which reached a maximum efficiency rate of 96.58%.

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“…The current of switch is given by (13). The current of diode D b and D f is given by ( 14) and (15), respectively.…”

Section: Operation Stages In Ccmmentioning

confidence: 99%

“…14 In this way, the converter achieves high voltage gain, but this requires a large number of components, which implies high costs and low reliability. Thus, in the proposed converter, 15 a CI is added to the three buck-boost stacked converter. This way, by configuring the transformation ratio (N) of the CI, the converter achieves high voltage gain.…”

mentioning

confidence: 99%

High step‐up buck–boost DC–DC converter with coupled inductor and low component count for distributed PV generation systems

Toebe

Faistel

Andrade

2022

Circuit Theory & Apps

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“…4. (25) In the on state the capacitor discharge and the output voltage is produced by capacitor. The capacitors voltage equation is:…”

Section:  (Switch S Onmentioning

confidence: 99%

“…A new topology was presented by using buck boost and flyback topologies to provide low voltage to high voltage conversion using renewable energy sources such as PV panels. Benefits were emphasized such as reducing the number of circuit elements in this topology, reducing the diode and switch stress, highly efficiency, and recovering the lost energy [25]. A half wave converter was used to improve the efficiency of PV systems under variable temperature and irradiation.…”

Section: Introductionmentioning

confidence: 99%

Twisting Sliding Mode Control based Maximum Power Point Tracking

Kayışlı

CAGLAYAN²

2022

Balkan Journal of Electrical and Computer Engineering

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For a world where energy demand is increasing day by day, available resources are constantly decreasing. At this point, it is very important to be able to benefit from the sun, which is the main energy source, with minimum damage to the environment. It is possible to produce electricity directly from sunlight through PV panels. Due to the limited efficiency of these panels, MPPT algorithms are always required. In this study, Sliding Mode Control (SMC) based Twisting Sliding Mode Control (T-SMC) MPPT, known for its robust structure, was performed and the results were compared with the classical SMC. The proposed MPPT algorithm is simulated with MATLAB/Simulink. The efficiency of T-SMC based MPPT is obtained as nearly 99%.

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“…Some converters complete high step‐up voltage feature by means of cascading power stages [18, 19], which really can obtain a high level of output voltage with uncomplicated control scheme but overall efficiency will be another issue. In [20], a preliminary topology of the high voltage‐gain converter is figured out; however, it lacks for comprehensive analysis, theoretical derivation, and detailed practical measurements.…”

Section: Introductionmentioning

confidence: 99%

Buck‐boost‐flyback integrated converter with single switch to achieve high voltage gain for PV or fuel‐cell applications

Shen

Chiu

2016

IET Power Electronics

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This study presents a buck-boost-flyback integrated converter (BBFIC), which can step up the voltage of photovoltaic (PV) module or fuel cell to a much higher level for grid-tied applications. The converter combines two buck-boost converters and one flyback converter into a single-stage structure with single power switch. In the power stage, an inductor and a coupled inductor are adopted to feature buck-boost and flyback behaviours, and three capacitors are connected in series to stack up output voltage. Even though it possesses the characteristics of buckboost and flyback converters, the problem of reversed voltage polarity is avoided and the energy stored in leakage inductor can be recycled without additional active clamp circuits. The structure of BBFIC can be easily expanded to obtain an extra-high voltage gain by stacking buck-boost cells or flyback cells. Voltage gain derivation and theoretical analysis are detailed in this study. Simulations and practical results measured from a prototype have validated the proposed BBFIC.

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A high step-up DC/DC converter for PV panel application

Cited by 6 publications

References 8 publications

High step‐up buck–boost DC–DC converter with coupled inductor and low component count for distributed PV generation systems

High step‐up buck–boost DC–DC converter with coupled inductor and low component count for distributed PV generation systems

Twisting Sliding Mode Control based Maximum Power Point Tracking

Buck‐boost‐flyback integrated converter with single switch to achieve high voltage gain for PV or fuel‐cell applications

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