Hybrid modular converter for DC microgrids

Revathi, B. Sri; Prabhakar, M.

doi:10.1049/iet-pel.2016.1034

Cited by 11 publications

(11 citation statements)

References 29 publications

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“…The output voltage of the converter varies by 2.67% of rated value when the load is increased to 125% of the rated load. The total power loss occurring in the converter is estimated using the expressions presented in [26] and [39]. The power loss distribution profile of the proposed HGHP converter is developed and presented in Fig.…”

Section: Hardware Results and Discussionmentioning

confidence: 99%

“…Both the proposed HGHP converter and the one presented in [26] offer the same voltage gain and operate at the same power levels; their P0/M ratio values are the highest and equal to 0.163. However, in [26], to achieve a high voltage gain and higher power handling capacity, combination of CIs and voltage extension cells are employed. Consequently, the TCC value is the highest in [26] which results in a relatively lower M/TCC and P0/TCC ratio values as compared to the proposed HGHP converter.…”

Section: CI Based Converters Versus the Proposed Hghp Convertermentioning

confidence: 99%

“…However, in [26], to achieve a high voltage gain and higher power handling capacity, combination of CIs and voltage extension cells are employed. Consequently, the TCC value is the highest in [26] which results in a relatively lower M/TCC and P0/TCC ratio values as compared to the proposed HGHP converter.…”

Section: CI Based Converters Versus the Proposed Hghp Convertermentioning

confidence: 99%

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Solar PV Fed DC Microgrid: Applications, Converter Selection, Design and Testing

Revathi

Prabhakar

2022

IEEE Access

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In this research article, major applications which use solar PV fed DC microgrid for either their routine operation or gain additional advantages over existing electrical power architecture are elaborated. The role of power converters in interfacing the input with the required output is highlighted. The advantages of solar PV fed DC microgrid are demonstrated by designing and testing a non-isolated high gain high power (HGHP) DC-DC converter to meet the DC distribution voltage level. The proposed converter is synthesized by using hybrid combination of three-phase interleaved boost converter (IBC) with voltage lift technique along with coupled inductors (CIs) and voltage multiplier cell (VMC). The proposed concept is practically demonstrated and the adopted design techniques are validated using simulation and experimentation. The proposed converter with 60V/1.1kV, 100kHz and 3kW rating operates at 92.3% full-load efficiency under practical conditions. Due to the gain extension techniques adopted, the switches used in the proposed converter are subjected to a voltage stress which is only 36% of the output voltage. Due to interleaving technique, the input current ripple and the current stress on the switches are only 15% and 33% of the input current respectively. Key performance parameters of this converter are thoroughly investigated and benchmarked with some state-of-the art converters to appreciate the salient features of the presented converter. The ability to yield higher voltage gain at safe duty ratio, high power handling capacity, low voltage and current stresses on the power switches are the main advantages of the proposed converter.INDEX TERMS DC-DC power converters, distributed power generation, power conversion, power electronics, renewable energy sources.

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Section: Hardware Results and Discussionmentioning

confidence: 99%

Section: CI Based Converters Versus the Proposed Hghp Convertermentioning

confidence: 99%

Section: CI Based Converters Versus the Proposed Hghp Convertermentioning

confidence: 99%

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Solar PV Fed DC Microgrid: Applications, Converter Selection, Design and Testing

Revathi

Prabhakar

2022

IEEE Access

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“…Bidirectional DC–DC converters are widely used in distributed generations [1], electric vehicles [2], uninterruptible power supplies [3] etc. Nowadays DC micro grid technology develops rapidly, thus bidirectional DC–DC converters will play more central role in power conversion system [4]. In order to achieve voltage matching and galvanic isolation, low‐frequency or high‐frequency transformer are often employed in bidirectional isolated DC–DC converters.…”

Section: Introductionmentioning

confidence: 99%

Dynamic compensation based feedforward control against output/input disturbance for LCL‐DAB DC–DC converter operated under no backflow power

Zhao

et al. 2021

IET Renewable Power Gen

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LCL-type resonant dual-active-bridge (LCL-DAB) DC-DC converters have more significant advantages in eliminating backflow power and achieving higher voltage gain compared with traditional dual active bridge (DAB) DC-DC converters. Therefore, LCL-DAB DC-DC converters have a broad application prospect in DC micro-grids, electric vehicles, uninterruptible power supplies etc. Since at this stage only a few researches on LCL-DAB DC-DC converters have been done, here, the specific system operation region with triplephase-shift (TPS) modulation scheme designed under no backflow power is presented. Furthermore, a dynamic compensation based feedforward control method under no backflow power is proposed, which enables the LCL-DAB DC-DC converter to operate under no backflow power in wide region and achieve outstanding dynamic performance against output/input disturbance. Finally, the experimental results verify the feasibility and effectiveness of the proposed control method.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…In the literature, various non-isolated converters have been suggested for example cascaded boost [12], quadratic boost [13], switched inductor (SI)/capacitor (SC) [14,15], voltage multiplier [16][17][18], interleaved boost converter [19,20], and combination of them. Various boosting techniques achieved high voltage output gain with more number of components.…”

Section: Introductionmentioning

confidence: 99%

High gain three‐state switching hybrid boost converter for DC microgrid applications

Maroti

Padmanaban

Bhaskar

et al. 2019

IET Power Electronics

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A novel high gain three-state switching hybrid boost (TSS-HB) converter for DC microgrid applications is proposed in this study. The TSS-HB converter is developed from a conventional boost converter with voltage lift technique. The high voltage gain is achieved by the inclusion of an additional semiconductor switch. Further, this structure reduces the voltage and current stress of the switches and diodes. The proposed TSS-HB converter operates in three switching states with the help of two different duty ratios (k 1 and k 2). The power circuitry, continuous conduction mode (CCM) and discontinues conduction mode (DCM), and characteristics waveform are discussed in detail based on the theoretical background. The voltage gain and efficiency analysis of TSS-HB in CCM is presented with consideration of non-ideal circuit components. While boundary condition and voltage gain in DCM is discussed with ideal components. The comparison sections highlight the advantages of TSS-HB over existed topologies with the same number of components. Further, the selection of semiconductor devices and the design of components are discussed in detail. Finally, the hardware results are presented which validate the predicted characteristics of TSS-HB converter.

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Hybrid modular converter for DC microgrids

Cited by 11 publications

References 29 publications

Solar PV Fed DC Microgrid: Applications, Converter Selection, Design and Testing

Solar PV Fed DC Microgrid: Applications, Converter Selection, Design and Testing

Dynamic compensation based feedforward control against output/input disturbance for LCL‐DAB DC–DC converter operated under no backflow power

High gain three‐state switching hybrid boost converter for DC microgrid applications

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