Design of a Series-type Dynamic Voltage Regulator for an Unbalanced Power System
Date Issued
2005
Date
2005
Author(s)
Huang, Kuo-Chen
DOI
zh-TW
Abstract
Abstract
The proliferation of voltage-sensitive load equipment has made industrial processes much more vulnerable to degradation in the quality of power supply. Voltage deviations, often in the form of voltage sags, can cause severe process disruptions and result in substantial economic losses. Therefore, cost-effective solutions which can help such sensitive loads ride through momentary power supply disturbances have attracted much research attention. Among the several novel custom power devices, the dynamic voltage restorer (DVR) for application in distribution systems is a recent invention.
The purpose of this thesis is to analyze and 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. Both steady-state performance and transient characteristic of the DVR are investigated in the thesis.
The effectiveness of the designed DVR is first investigated by digital simulations using the PSCAD software. Then, in the experiment, the control kernel of digital system for DVR is based on a personal computer with Adventec PCL-1800 data acquisition cards. The three-phase pulse width modulation signals are generated by computer software in order to reach the objective of voltage compensation.
Finally, it is concluded from results of simulations and experiments that load bus voltage can be effectively regulated by the designed DVR.
Subjects
動態電壓調整器
Dynamic Voltage Regulator
Type
thesis
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