A bidirectional single stage three phase rectifier with high-frequency isolation and power factor correction
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The document discusses a bidirectional single-stage three-phase rectifier designed for high-frequency isolation and power factor correction, particularly relevant in telecommunications and renewable energy systems. It outlines existing systems, their challenges, and the proposed solution which enhances efficiency and reduces harmonic content, suitable for applications like photovoltaic systems, smart grids, and telecom power supplies. Advantages include increased power density and efficiency, while drawbacks consist of low power density and circuit complexity.
A bidirectional single stage three phase rectifier with high-frequency isolation and power factor correction
- 1. The Master of IEEE Projects Copyright © 2016LeMenizInfotech. All rights reserved LeMenizInfotech 36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue, Pondicherry-605 005. Call: 0413-4205444, +91 9566355386, 99625 88976. Web :www.lemenizinfotech.com/ www.ieeemaster.com Mail : [email protected] A Bidirectional Single-Stage Three Phase Rectifier with High-Frequency Isolation and Power Factor Correction Introduction: The use of equipment supplied by dc voltages rated within the range of 380-400 V is currently found in industry, particularly in telecommunications. Besides, the study of dc transmission system has been intensified in the recent literature, mainly due to the widespread use of small electrical grids and the intensive exploitation renewable energy sources such as photovoltaic systems and wind energy conversion systems (WECSs), which rely on dc voltages. With the expansion of the distribution systems in recent decades and the introduction of the smart grid concept, studies focused on topologies with bidirectional capability to manage power flow between the different energy sources (such as wind turbines, photovoltaic modules, fuel cells, among others) and storage systems have been increasingly carried out. Figure presents a typical distribution system composed of high voltage lines and loads supplied by either ac or dc medium and low voltages, while distinct primary sources also exist. Existing system: A bidirectional version of the topology introduced in without output inductor filter, which is shown in Figure. The converter increases power rating by paralleling phases, not by paralleling
- 2. The Master of IEEE Projects Copyright © 2016LeMenizInfotech. All rights reserved LeMenizInfotech 36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue, Pondicherry-605 005. Call: 0413-4205444, +91 9566355386, 99625 88976. Web :www.lemenizinfotech.com/ www.ieeemaster.com Mail : [email protected] multiple devices, and it decreases turn ratio due to a double output voltage by transformer open delta-wye connection. The possibility of direct and indirect power flow is achieved with dual phase-shift (DPS) Considering appropriate angles, it is possible to reduce the reactive content and reduce transformer volume. The duty cycle of the input bridge can be varied to regulate the input voltage and ensure ZVS over the entire operation range. Drawbacks: Low power density Complex circuit Less efficiency Proposed system: The proposed converter is shown in Figure, which is based on the DAB converter, since the primary side is composed by a full-
- 3. The Master of IEEE Projects Copyright © 2016LeMenizInfotech. All rights reserved LeMenizInfotech 36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue, Pondicherry-605 005. Call: 0413-4205444, +91 9566355386, 99625 88976. Web :www.lemenizinfotech.com/ www.ieeemaster.com Mail : [email protected] bridge converter employing the 3SSC. The use of the 3SSC allows good distribution of losses among the semiconductors and also reduction of high-frequency harmonic content for both voltages and currents. In order to obtain reduced reactive power flow through the transformer windings, the secondary is composed by a similar arrangement using full bridge converters. Advantages: Reduction of high-frequency harmonic content for both voltages and currents. High power density. High efficiency. Applications: Photovoltaic systems and wind energy conversion systems.
- 4. The Master of IEEE Projects Copyright © 2016LeMenizInfotech. All rights reserved LeMenizInfotech 36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue, Pondicherry-605 005. Call: 0413-4205444, +91 9566355386, 99625 88976. Web :www.lemenizinfotech.com/ www.ieeemaster.com Mail : [email protected] Smart-grids. Telecommunications (telecom) power supplies. More recent applications such as electric vehicles. Block diagram: AC Supply Isolation Transformer Three Phase Rectifier Load Driver Circuit Buffer circuit Micro-controller circuit 5V DC Supply 12V DC Supply