The output voltage available from renewable sources like photovoltaic panels, fuel cells and battery banks are too low to be practically utilised. Therefore, the available voltage must be stepped up considerably before connecting to the load. In this paper, a novel topology, which consists of two interleaved stages and five voltage multiplier cells, is presented. The topology is derived from a classical boost converter and utilises two switches, two inductors for the interleave stage,12 diodes, 12 capacitors and one voltage lift capacitor to provide a voltage gain of 14. In general, a topology that provides a gain (N + 2) times that of a classical boost converter utilises (2N + 2) diodes and (2N + 2) capacitors along with a voltage lift capacitor. The primary feature of this topology is its capability to provide high-conversion ratio without using a transformer; additional features are, continuous input current, moderate duty cycle operation and modularity. Experimental results obtained from a 100 W, 24 V/336 V prototype demonstrate the feasibility of the converter and validate the converter design. © 2014 Inderscience Enterprises Ltd.

Prabhakar M

Electrical

School of Electrical Engineering

Chennai Campus

Ganesan R.G

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Non-isolated high step-up interleaved boost converter

International Journal of Power Electronics

In this paper, a novel high-gain DC–DC converter which is suitable for integrating low-voltage renewable energy source with a common DC bus is presented. The proposed converter is synthesised from a quadratic boost converter (QBC). Two QBC structures are interleaved to reduce the current ripple at the input port (12.9% of input current). The voltage conversion ratio of the proposed interleaved quadratic boost converter (IQBC) is extended by using the voltage lift technique. The energy storage inductors are judiciously coupled to realise a compact IQBC. Experimental results obtained from a 24 to 380 V, 100 W prototype converter validate the novel gain extension method and proposed design concepts. Under full-load condition, the practical efficiency value of the proposed converter is 92.49%. By implementing a simple closed loop, the output voltage of the proposed converter is regulated and maintained constant at 380 V when the input voltage and load current change. Under practical conditions, the percentage voltage regulation and the time response characteristics of the proposed IQBC are extremely satisfactory. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.

Electrical Engineering

Interleaved quadratic boost DC–DC converter with high voltage gain capability

In this manuscript a DC non-isolated converter model with high static voltage gain module is presented. The proposed converter has the feature of stable frequency and stable output voltage. It also achieves high voltage conversion, high efficiency, low voltage stress and less switching loss. The voltage tripler technique is implemented in the proposed model. The designed converter model attains high static gain with reduced duty cycle. The proposed single switch converter is controlled by fuzzy-PI controlled technique. The working process of the converter under Continuous Conduction Mode (CCM) is explained. The 30 V input source is boosted up to 400 V. The simulation of the presented converter is done with MATLAB simulink. The hardware prototype is also tested and results are analysed. © 2018 - IOS Press and the authors. All rights reserved

Journal of Intelligent & Fuzzy Systems

A Fuzzy controlled high gain DC–DC converter for renewable power generation

In this paper a non-isolated high gain DC-DC converter which is preferred for photovoltaic (PV) applications is proposed. This converter uses hybrid switched inductor technique to enhance its overall voltage gain. The inductors of the gain extension network are all charged together in parallel and get discharged simultaneously in series to obtain the high voltage gain (&gt;10). Resultantly, the voltage stress experienced by the switches of the proposed converter are reduced to 55% of the desired output voltage. An experimental prototype version of the proposed converter yields the rated voltage gain of 10.8 and delivers 21OW at a maximum efficiency of 94.45% when excited from an input voltage of 35 V. Further, the operating range of the converter is demonstrated by experimental results which are obtained for an output power ranging from 90% to 95% of rated power. © 2019 IEEE.

2019 IEEE International Conference on System, Computation, Automation and Networking (ICSCAN)

High Gain DC-DC Converter Based on Hybrid Switched-Inductor Topology for PV Application

In this paper, a novel non-isolated DC-DC converter topology is proposed for solar photovoltaic (PV) application. The proposed converter is constructed from an interleaved boost converter (IBC) to reduce the input current ripple. Voltage gain is extended by (i) using voltage lift technique, (ii) replacing the conventional inductors of the IBC by coupled inductors (CIs) with appropriate turns ratio and (iii) connecting a voltage multiplier cell (VMC) across the secondary windings of the CIs. As the voltage gain is extended mainly at the secondary side of the CIs, the switches are subjected to low voltage stress which is only 12.63% of the output voltage. The converter yields a high voltage conversion ratio of 15.83. Experimental results obtained from a 24 V/380 V, 225 W prototype converter operating at 91.6% efficiency serves as a proof of the presented concept which has been employed to achieve high voltage conversion ratio (15.83) with low input current ripple (20%). © 2019 International Solar Energy Society

Solar Energy

Interleaved high gain DC-DC converter for integrating solar PV source to DC bus

This paper proposes a three phase interleaved high gain DC-DC converter for photovoltaic (PV) applications. Interleaving technique reduces the input current ripple and current stress on the power switch while simultaneously handling high power. The voltage gain is extended by using a voltage lift capacitor, coupled inductor and voltage multiplier cell. Since voltage gain extension is realized at the secondary side of the coupled inductors, the voltage stress on the switches is only a fraction of the output voltage. Experimental results obtained from a 24V/260V, 500W prototype converter proves the converter suitability for high step up voltage conversion. © 2017 The Authors. Published by Elsevier Ltd.

Fulltext

Energy Procedia

High Step-Up DC-DC Converter with Reduced Switch Stress and Low Input Current Ripple

This paper introduces a novel high gain DC-DC converter topology which can be used for photovoltaic (PV) applications. The proposed DC-DC converter consists of 3 interleaved boost converters and 2 voltage multiplier cells (VMC). The operating principle, characteristic waveforms, design details along with the simulation results prove the validity of the design and its superiority over existing converter topologies in terms of its ability to provide high voltage gain at higher power level and low device stress. The proposed topology is able to produce a voltage gain of 10 and deliver 3kW output power at 88% efficiency. © 2013 IEEE.

2013 Annual International Conference on Emerging Research Areas and 2013 International Conference on Microelectronics, Communications and Renewable Energy

High gain high power DC-DC converter for photovoltaic application

The output voltage from most renewable energy sources like photovoltaic arrays and fuel cells will be at low level. This must be stepped up considerably for practical utilization or grid connection. The presented multilevel boost converter DC-DC converter topology consists of the conventional boost converter and voltage doubler stages to provide high voltage gain. The proposed topology uses only one switch along with one inductor, (2N-1) diodes and (2N-1) capacitors for obtaining an output which is N times the conventional boost converter. In this topology, each device blocks only one voltage level. The main advantages of this topology are continuous input current, large gain without high duty cycle or transformer, modularity and use of devices with low voltage ratings. Experimental results obtained from the 100W prototype demonstrate the voltage gain capability of the converter and validates the converter design. © 2013 Institute of Advanced Engineering and Science. All rights reserved.

Journal	International Journal of Power Electronics
Publisher	Inderscience Publishers
ISSN	1756-638X
Open Access	No