Design of Dynamic Voltage Regulator Using Fuzzy Logic and Sliding-mode Control
碩士 === 國立臺灣大學 === 電機工程學研究所 === 96 === The power quality affects the industry to a great extent. Poor quality in the power supply, such as voltage fluctuations, may cause damage in sensitive equipments. How to maintain constant voltage profile at the load bus under disturbance conditions is of major...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2008
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| Online Access: | http://ndltd.ncl.edu.tw/handle/49652354343281828480 |
| Summary: | 碩士 === 國立臺灣大學 === 電機工程學研究所 === 96 === The power quality affects the industry to a great extent. Poor quality in the power supply, such as voltage fluctuations, may cause damage in sensitive equipments. How to maintain constant voltage profile at the load bus under disturbance conditions is of major concern in this work.
The purpose of this thesis is to use fuzzy logic theory and
sliding-mode control to design the Dynamic Voltage Regulator (DVR).This compensator employs a direct current capacitor to offer the voltage source and uses the pulse-width modulation technology to adjust the output voltage of the three-phase voltage-sourced inverter. It proves the stability of the sliding-mode controller applied to the dynamic voltage regulator in the thesis first of all. Then, it improves common chattering in traditional sliding-mode control by using two different Fuzzy Logic theories. The output of the controller is a constant offset signal in the
steady state and the dynamic voltage regulator achieve pure reactive power compensation. When system is in transient state as load variation,the controller output an additional transient signal and the dynamic voltage regulator compensates the load voltage drop. The system comes back to steady state quickly. The effectiveness of the designed DVR is first investigated by digital simulations using the MATLAB/SIMULINK software.
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