PV-fed non-isolated resonant converter for DC microgrid applications

Gökdağ, Mustafa

doi:10.1007/s00202-022-01589-2

Cited by 6 publications

(2 citation statements)

References 38 publications

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“…In a stand-alone system, the boost converter is widely used to increase the voltage at the output side [16], [17], [18] and [19]; however, if the PV array is connected in a series, the boost converter has to be replaced with a flyback or buck-boost converter [20], [21], [22], [23] and [24]. In the present investigation, a novel converter [25] is proposed to overcome the issue of obtaining only higher gain and inductor shorting with the boost converter and buck-boost converter, respectively.…”

Section: Introductionmentioning

confidence: 99%

A Novel Converter using MPPT Algorithm and Acceleration Factor for Stand-alone PV System

Agrawal

Umanand

2023

Preprint

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Solar power is an excellent alternative to existing power sources. A stand-alone PV system highlights the necessity of solar energy, where PV panels act as a source to the connected loads. The intermittent nature of solar insolation necessitates a storage system or a battery to store the energy. A DC-DC converter is required to operate the PV panel at MPPT (Maximum Power Point Tracking). The converter also maintains the DC link voltage, a common link between the PV panels, battery system, and the load. An additional bidirectional DC-DC converter is required to charge and discharge the battery at a constant current and voltage profile according to its changing profile. In the present investigation, a novel high-efficiency DC-DC converter is used to perform the MPPT. This converter enables the connection of solar panels in series or parallel because it can step up or step down the PV voltage according to the DC link voltage. Another bidirectional DC-DC converter is used at the load side to maintain DC link voltage and charge/discharge the batteries. Further, the second part of the paper discusses a novel MPPT algorithm, which is vital in tapping the maximum power from PV panels. A fast solar MPPT is desired to track the operating point, which can be served by adding an acceleration factor to the existing perturb and observe (hill climbing) solar MPPT algorithm. A detailed analysis with hardware results obtained for various conditions and acceleration factors is presented.

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Section: Introductionmentioning

confidence: 99%

A Novel Converter using MPPT Algorithm and Acceleration Factor for Stand-alone PV System

Agrawal

Umanand

2023

Preprint

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“…Recently, step-down converters have many applications such as voltage regulator modules (VRM) for suppling microprocessors and battery chargers. In order to have low current ripple and suitable dynamic response, interleaved structure is presented because these structures have simple operation and power division between parallel branches, which reduces the effective input current for each branch [1][2][3]. But contrary to the advantages of interleaved buck converter, these converters have problems such as high voltage stress on switches, narrow duty cycle and high switching losses.…”

Section: Introductionmentioning

confidence: 99%

A new ZVT high step-down WCCI converter with low output current ripple

memarian¹,

Delshad²,

Sajadieh³

2022

Preprint

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In this paper, an interleaved step-down converter with zero voltage switching for the switches and low output current ripple is presented. Two ferrite cores with three windings are used in the proposed converter to reduce the voltage gain and the output current ripple. Therefore, the volume of the circuit does not change significantly. According to the structure of the proposed converter and the use of the ripple cancellation technique, the ripple of the output current is not high despite the use of coupled inductors. The auxiliary switch is also turned on under ZC condition and turned off under ZVZC condition. Therefore, the auxiliary circuit does not impose significant losses on the converter. To prove the correctness of the theoretical analyzes of the proposed converter, a 160W prototype has been implemented. The practical results show 95% efficiency at full load and 0.2A ripple in the output current.

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