New topologies of high gain-step-up dc-dc power converters for renewable energy applications

2020 ◽  
Author(s):  
◽  
Mamdouh L. Alghaythi
Keyword(s):  
High Voltage ◽  
Closed Loop ◽  
Low Voltage ◽  
Open Loop ◽  
Loop System ◽  
Input Current ◽  
Voltage Gain ◽  
Voltage Multiplier ◽  
Coupled Inductors ◽  
Simulation Results

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] This dissertation proposes new topologies of high step-up dc-dc power electronic converters for integration renewable energy systems, such as photovoltaic panels (PV) from low voltage sources to high voltage dc buses in 480/900. The first topology presents a high step-up interleaved dc-dc converter with voltage multiplier cells and coupled inductors. The proposed converter achieves a very high step-up voltage gain due to the two coupled inductors and the voltage multiplier cell. This topology utilizes the interleaved boost converter in the input side, and the input current is shared with low ripple. Moreover, the voltage multiplier cell with the secondary windings of the coupled inductors is employed in the output side to achieve the interleaved energy storage. The voltage stress on the semiconductors switches and the passive components is significantly reduced and lower than the output voltage. The aforementioned converter can be operated without an extreme duty cycle or a high turns ratio. The operation principle of the proposed converter and the comparison between the proposed converter with other topologies are discussed. The parameters selection, and simulation results are thoroughly introduced. A 32 V to 800 V-dc is verified and simulated by using PLECS. The second topology introduces a new high voltage gain interleaved DC-DC Converter with diodes-capacitors technique and dual coupled inductors to lift a 30 V to 900 V. The input current ripple is reduced due to the interleaved dc-dc converter operation, the voltage loss on power semiconductor devices is mitigated. Furthermore, by implementing low-voltage-rated MOSFETs with a small ON-resistance, the conduction losses can be reduced, and the efficiency can be improved. The reverse recovery problem of the diodes is mitigated, and the leakage energy is recycled. The simulation results are explored. The other two proposed converters present a multiphase-interleaved boost high step-up dc-dc converter and a high voltage gain converter with an improved charge pump. Both the proposed converters offer a continuous input current, and they both operate in the continuous conduction mode. The voltage stress, the current stress and the losses on power devices are reduced with providing an ultra-voltage gain. The theoretical analysis of the aforementioned converters are analyzed with supporting simulation. The control techniques of high step-up dc-dc converters, which include the maximum power point tracking for PV applications, voltage mode control, PWM and the closed loop control response are provided. The control strategy for the dynamic performance of the aforementioned converter is presented thoroughly. The pulse width modulation (PWM) is generated by the digital signal processor (DSP) Texas Instrument TMS320F28234ZJZ. The method for designing a closed loop system includes choosing the type of control (voltage mode or current mode), generating a small signal model of the power converter, regulating the control to output transfer function of the open loop system, constructing the bode plots of the open loop system, designing voltage compensator transfer function with closed loop bode plots, and providing the simulation results.

A High Step-up DC-DC Converter Based on the Voltage Lift Technique for Renewable Energy Applications

2021 ◽  
Vol 13 (19) ◽  
pp. 11059
Author(s):  
Shahrukh Khan ◽  
Arshad Mahmood ◽  
Mohammad Zaid ◽  
Mohd Tariq ◽  
Chang-Hua Lin ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Common Ground ◽  
Closed Loop ◽  
Low Voltage ◽  
Renewable Energy Sources ◽  
Input Voltage ◽  
High Gain ◽  
Boost Converter ◽  
Open Loop ◽  
Voltage Gain

High gain DC-DC converters are getting popular due to the increased use of renewable energy sources (RESs). Common ground between the input and output, low voltage stress across power switches and high voltage gain at lower duty ratios are desirable features required in any high gain DC-DC converter. DC-DC converters are widely used in DC microgrids to supply power to meet local demands. In this work, a high step-up DC-DC converter is proposed based on the voltage lift (VL) technique using a single power switch. The proposed converter has a voltage gain greater than a traditional boost converter (TBC) and Traditional quadratic boost converter (TQBC). The effect of inductor parasitic resistances on the voltage gain of the converter is discussed. The losses occurring in various components are calculated using PLECS software. To confirm the performance of the converter, a hardware prototype of 200 W is developed in the laboratory. The simulation and hardware results are presented to determine the performance of the converter in both open-loop and closed-loop conditions. In closed-loop operation, a PI controller is used to maintain a constant output voltage when the load or input voltage is changed.

scholarly journals High-Gain High-Efficiency DC–DC Converter with Single-Core Parallel Operation Switched Inductors and Rectifier Voltage Multiplier Cell

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4634
Author(s):  
Eduardo Augusto Oliveira Barbosa ◽  
Márcio Rodrigo Santos de Carvalho ◽  
Leonardo Rodrigues Limongi ◽  
Marcelo Cabral Cavalcanti ◽  
Eduardo José Barbosa ◽  
...  
Keyword(s):  
High Voltage ◽  
Duty Cycle ◽  
High Efficiency ◽  
High Gain ◽  
Voltage Gain ◽  
Parallel Operation ◽  
Voltage Multiplier ◽  
Coupled Inductors ◽  
High Voltage Gain

This paper proposes a high step-up high-efficiency converter, comprised of an active switched coupled-inductor cell. The secondary windings are integrated into a rectifier voltage multiplier cell in a boost-flyback configuration, allowing the operation with high voltage gain with low switches duty cycle and low turn-ratios on the coupled-inductors. Both coupled-inductors are integrated into a single core due to the parallel operation of the switches. The leakage inductances of the coupled-inductors are used to mitigate the reverse recovery currents of the diodes, while regenerative clamp circuits are used to protect the switches from the voltage spikes caused by the leakage inductances. The operation of the converter is analyzed both quantitatively and qualitatively, and the achieved results are validated through experimentation of a 400 W prototype. A 97.1% CEC efficiency is also reported.

scholarly journals Voltage Multiplier Cell-Based Quasi-Switched Boost Inverter with Low Input Current Ripple

Electronics ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 227 ◽  
Author(s):  
Minh-Khai Nguyen ◽  
Youn-Ok Choi
Keyword(s):  
High Voltage ◽  
Pulse Width Modulation ◽  
Input Current ◽  
Voltage Gain ◽  
Design Guideline ◽  
Voltage Multiplier ◽  
High Voltage Gain ◽  
High Modulation ◽  
Voltage Stress ◽  
Current Ripple

A novel single-phase single-stage voltage multiplier cell-based quasi-switched boost inverter (VMC-qSBI) is proposed in this paper. By adding the voltage multiplier cell to the qSBI, the proposed VMC-qSBI has the following merits; a decreased voltage stress on an additional switch, a high voltage gain, a continuous input current, shoot through immunity, and a high modulation index. A new pulse-width modulation (PWM) control strategy is presented for the proposed inverter to reduce the input current ripple. To improve the voltage gain of the proposed inverter, an extension is addressed by adding the VMCs. The operating principle, steady-state analysis, and impedance parameter design guideline of the proposed inverter are presented. A comparison between the proposed inverter and other impedance source-based high-voltage gain inverters is shown. Simulation and experimental results are provided to confirm the theoretical analysis.

scholarly journals A Quadratic Boost Converter with Voltage Multiplier Cell to Increase Voltage Gain

2021 ◽  
Vol 7 (03) ◽  
pp. 76-79
Author(s):  
P.Rangeela and Dr.A.RubyMeena
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
Boost Converter ◽  
Voltage Gain ◽  
Loop Control ◽  
Voltage Multiplier ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Integral Controller ◽  
Proportional Integral Controller

The high step up dc-dc converter with a quadratic boost converter with voltage multiplier cell (VM) to achieve a high voltage gain in the continuous conduction mode (CCM). To increase higher voltage gain, lower voltage stress on diodes and capacitors and requiring smaller inductors with reduced number of components. Quadratic Boost DC-DC converters are mainly used in applications like HEVs and EVs vehicles. The purpose of boost converter is to charge a low-voltage (12 V) battery during boost mode and to assist the high-voltage 200V battery. In this implementation, closed-loop control in high voltage side is implemented using PI (proportional integral) controller.

scholarly journals Transformerless high gain boost converter for low power applications with feedback control

2015 ◽  
Vol 16 (2) ◽  
pp. 244
Author(s):  
Md Yaseen ◽  
Dr. P Usha
Keyword(s):  
Feedback Control ◽  
Low Power ◽  
High Voltage ◽  
Duty Cycle ◽  
High Gain ◽  
Boost Converter ◽  
Input Current ◽  
Voltage Gain ◽  
Coupled Inductors ◽  
Current Ripple

A transformer-less boost converter which provides high voltage gain without utilizing transformer or coupled inductors and extreme duty cycle is proposed in this paper.  Also it is able to cancel the ripples in the input current at a preselected duty cycle, without increasing the number of components. The converter combines the features of boost converter and a three switch high voltage converter. At the input side, two inductors are interleaved for cancelling the input current ripple and at the output side switched capacitor voltage multiplier is used to increase the voltage gain. Feedback control is used to make the output voltage constant in spite of variation in the input or load or both i.e. both line and load regulation is accompanied. This proposed converter configuration helps eliminate the input current ripple and provides voltage deregulation for low power applications.

scholarly journals A Quadratic Boost Converter with Voltage Multiplier Cell to Increase Voltage Gain

2021 ◽  
Vol 7 (03) ◽  
pp. 76-79
Author(s):  
P.Rangeela and Dr.A.RubyMeena
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
Boost Converter ◽  
Voltage Gain ◽  
Loop Control ◽  
Voltage Multiplier ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Integral Controller ◽  
Proportional Integral Controller

The high step up dc-dc converter with a quadratic boost converter with voltage multiplier cell (VM) to achieve a high voltage gain in the continuous conduction mode (CCM). To increase higher voltage gain, lower voltage stress on diodes and capacitors and requiring smaller inductors with reduced number of components. Quadratic Boost DC-DC converters are mainly used in applications like HEVs and EVs vehicles. The purpose of boost converter is to charge a low-voltage (12 V) battery during boost mode and to assist the high-voltage 200V battery. In this implementation, closed-loop control in high voltage side is implemented using PI (proportional integral) controller

scholarly journals Symmetrical high voltage gain half-bridge inverter based double-Y-source networks with reduced voltage stress

2020 ◽  
Vol 11 (1) ◽  
pp. 515
Author(s):  
Hussain Sayed ◽  
Oday A Ahmed ◽  
Dhari Y Mahmood ◽  
Kanaan A. Jalal ◽  
Waleed H. Habeeb
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
Single Stage ◽  
Voltage Gain ◽  
Saturation State ◽  
Coupled Inductors ◽  
High Voltage Gain ◽  
Source Impedance ◽  
Voltage Stress ◽  
Mathematical Formulas

<span>A single-stage symmetrical high voltage gain half-bridge (HB) DC-AC converter is proposed in this paper. Using two Y-source impedance networks, the following key features are utilized from the proposed topology: single stage inverter with very high voltage gain compared to conventional HB inverter, symmetrical output voltage waveform, low voltage stress across the passive components because it is distributed across two impedance networks, and only two switching devices are needed for the converter. Furthermore, important merit of the proposed topology is that the current drawn by the Y-coupled inductors is symmetrical around the X-axis which helps to prevent the Y-network cores from reaching the saturation state. And the last compelling feature is a virtual neutral point for the load connection is inherited in the proposed double Y-source impedance networks converter with no need for DC-Link capacitors. For low voltage sources such as photovoltaic (PV) and fuel cell, the converter is designed to achieve continuous input current operation. The operation modes and principles of the inverter are analyzed and discussed deeply in this paper. A detailed mathematical equations system is derived and verified for the presented converter. Finally, PSpice simulation tools are used to simulate the converter and verify the derived mathematical formulas.</span>

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