Input-Series–Output-Parallel-Connected BuckRectifiers for High-Voltage Applications,2015 Power Electronics Projects Training Contact: IIS TECHNOLOGIES ph:9952077540,landline:044 42637391 mail:info@iistechnologies.in www.iistechnologies.in

1. Input-Series–Output-Parallel-Connected Buck
Rectifiers for High-Voltage Applications
Presented by
IIS TECHNOLOGIES
No: 40, C-Block,First Floor,HIET Campus,
North Parade Road,St.Thomas Mount,
Chennai, Tamil Nadu 600016.
Landline:044 4263 7391,mob:9952077540.
Email:info@iistechnologies.in,
Web:www.iistechnologies.in
www.iistechnologies.in
Ph: 9952077540

2. Abstract
• This project presents input-series–output parallel (ISOP) configuration for single-phase front-end
buck rectifiers (BRs).
• The configuration is especially suitable for traction applications, where the complete rectification
system needs to withstand high ac voltages and supply medium-power loads.
• The primary rectification module of the proposed configuration is based on pulse width-
modulated BR (current source inverter topology).
• The desired isolation, mandatory for ISOP connection, is provided at the dc stage through a
medium frequency/ high-frequency transformer.
• Equal power sharing by modules is achieved from the ac side through input voltage and current
sharing.
• The proposed control scheme is configured using two loops.
• While the outer loop regulates the output dc voltage and active wave shaping of the source
current, the inner loop ensures stable voltage sharing.
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Ph: 9952077540

3. CIRCUIT DIAGRAM
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4. Existing System
• Topological constraints of the VSI modules dictate that the ac voltage shared by each module is
lesser than the dc link voltage.
• Hence, the number of modules required for the traction drive is solely decided by the dc link
voltage.
• This imposes a limit on the minimum number of modules that are required to be connected in
series to withstand the catenary voltage. Considering
• this constraint, current source inverter (CSI) topologies, which offer the inherent advantage of
reduced dc voltage, may offer a viable solution.
• However, their suitability for traction application has not received attention in the available
literature.
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5. Proposed System
• Considering the modular structure of the ISOP configuration and the advantage offered by CSI or
buck-rectifier (BR) topologies in terms of reduced dc voltage, an ISOP configuration for BR
modules is proposed in this paper.
• Owing to the reduced size of magnetics, dc–dc isolation stage is used.
• The major focus of this project is to investigate the stability of ISOP configured BR modules;
hence, resistive load is used to verify the system stability.
• The proposed control scheme is based on equal ac voltage sharing (AVS) and ac current sharing
(ACS).
• The two-loop control scheme consists of an outer loop, which ensures stable output dc voltage
and high-quality near unity power factor (UPF) source current, and an inner loop, which ensures
active power sharing through reactive power control of each module.
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Ph: 9952077540

6. TOOLS AND SOFTWARE USED
• MP LAB
• ORCAD/PSPICE
• MATLAB/SIMULINK
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7. OUTPUT
• HARDWARE
• SIMULATION
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Ph: 9952077540

8. Services Offered
• Prototype KIT with Software’s
• Documents
• Video File
• Skype classes(Online Support)
• Team viewer Support(Online Support)
• Future Enhancement
• Paper writing
• Support For Inter-National Conference paper publication.
www.iistechnologies.in
Ph: 9952077540

9. Contact
IIS TECHNOLOGIES
No: 40, C-Block,First Floor,HIET Campus,
North Parade Road,St.Thomas Mount,
Chennai, Tamil Nadu 600016.
Landline:044 4263 7391,mob:9952077540.
Email:info@iistechnologies.in,
Web:www.iistechnologies.in,
www.iistechnologies.in