Design of a Three-Phase 6kW Four-Switch Rectifier with Input Power Factor Correction

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Ounie, Saeed | 2010

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 40505 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Zolghadri, Mohammad Reza
Abstract:
In this work, design and control of three-phase four-switch rectifier with input power factor correction and operation under unbalance input voltage is investigated. To control of this converter, a modified space vector modulation (SVM) method is proposed able to omit effect of capacitors voltage ripple on output voltage and input current. A small signal model and required transfer function are calculated to control converter. Then appropriate controller is designed in dq space to achieve desired condition. Another controller is added to system to compensate capacitors dc voltage difference. A useful method to decomposition of positive and negative sequence of dq component is introduced. After that, the criteria that converter must support under unbalancing condition such as reactive power and second order component of power omitting, is determined and finally controller is modified to improve converter performance. To show designed controllers effectiveness, the rectifier is simulated in SIMULINK for various operational conditions.
Keywords:
Vector Control ; Four-Switch Rectifier ; Input Power Factor Correction ; Input Voltage Unbalancy

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