scholarly journals High Voltage using DC-DC Switched Capacitor Converter for PV Application without Transformer

2019 ◽  
Vol 9 (2S4) ◽  
pp. 431-434
Keyword(s):  
High Voltage ◽  
Electromagnetic Interference ◽  
High Efficiency ◽  
Life Time ◽  
Switched Capacitor ◽  
Voltage Gain ◽  
High Voltage Gain ◽  
Ac Power ◽  
Switched Capacitor Converter ◽  
Current Ripples

In this paper, a DC-DC switched capacitor (SC) converter without using transformer is designed to achieve high voltage gain. Normally a transformer is used for AC-AC power conversion with step up or step down operation without changing the frequency. But it occupies more space due to its size and weight. Therefore, switched capacitor is used for achieving high voltage combine with converter, in order to avoid the transformer due to more expensive and losses. The traditional converter consists of more switches and stresses as well as losses with converter. In proposed converter, it uses fewer amounts of switches and gives high efficiency to increase the voltage gain. The current ripples are filtered that help to device life time and also reduce the electromagnetic interference. The designed converter is analyzed and the voltage is attained using MATLAB/Simulink.

scholarly journals SiC-Based Bidirectional Multilevel High-Voltage Gain Switched-Capacitor Resonant Converter with Improved Efficiency

Energies ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2445 ◽  
Author(s):  
Adam Kawa ◽  
Robert Stala
Keyword(s):  
High Voltage ◽  
Power Efficiency ◽  
Switched Capacitor ◽  
Voltage Gain ◽  
Laboratory Equipment ◽  
Voltage Range ◽  
Laboratory Setup ◽  
High Voltage Gain ◽  
Switched Capacitor Converter ◽  
Proposed Modification

This paper presents the research results of the bidirectional multilevel resonant switched capacitor converter (MRSCC). The converter can achieve a high voltage ratio in multilevel topology, which limits the voltage stress on switches and is able to operate with high power efficiency. The converter can be applied as an interconnector between DC voltage systems used for various applications. This paper presents a method that significantly improves the efficiency of the MSRCC through topology modification. Furthermore, the feasibility of the converter was demonstrated with the use of SiC and Si MOSFET switches, together with suitable passive components. It was demonstrated that the proposed modification of the topology makes the converter very efficient in SiC-based ones and can significantly improve the efficiency of Si MOSFET converters. The series of test results of the SiC-based converter is a novel aspect presented in this paper and shows promising achievements of efficiency. The results were obtained from the laboratory setup of 5 kW and 0.5/2 kV MRSCC. To demonstrate the bidirectional operation of the converter, a back-to-back setup (0.5/2/0.5 kV) was used. It also demonstrates that such a high-voltage gain converter can be accurately tested with the use of laboratory equipment with a typical voltage range.

Experimental validation of nine‐level switched‐capacitor inverter topology with high voltage gain

2021 ◽  
Author(s):  
Jagabar Sathik Mohamed Ali ◽  
Marif Daula Siddique ◽  
Saad Mekhilef ◽  
Yongheng Yang ◽  
Yam Siwakoti ◽  
...  
Keyword(s):  
High Voltage ◽  
Experimental Validation ◽  
Switched Capacitor ◽  
Voltage Gain ◽  
High Voltage Gain ◽  
Inverter Topology

scholarly journals A Modified High Voltage Gain SEPIC Based DC-DC Converter with Continuous Conduction Mode

2020 ◽  
Vol 6 (12) ◽  
pp. 268-274
Author(s):  
G.Vijaykumar and Dr.V.Geetha
Keyword(s):  
High Voltage ◽  
High Efficiency ◽  
Input Voltage ◽  
Voltage Gain ◽  
Pv System ◽  
Operating Modes ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
High Output Voltage ◽  
High Output

A high voltage gain modified SEPIC converter is proposed in this paper. This proposed converter has many advantages i.e., high output voltage, lower voltage stress, high efficiency, voltage gain is high without any coupled inductor and transformer, continuous input current. Thus, there is no overshoot voltage at turn-off process for switches. By using single switches, the CCM mode operation can be easily controlled by this converter, so control system is simple and also wide output values is obtained only by modifying the duty cycle. This modified converter has lower components than conventional converter. The operating modes and design of modified converter are discussed. The output power of this converter is 6 watts. By this converter, this converter capable of developing the two and half times of input voltage. The PV system also used this converter to develop high voltage gain. This high voltage gain is achieved by using MATLAB/SIMULIMK platform.

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