DocumentCode :
1680674
Title :
Controller design for dynamic voltage restorer with harmonics compensation function
Author :
Cho, Young-Hoon ; Sul, Seung-Ki
Author_Institution :
Chassis Module R&D Dept., Hyundai-mobis Co. Ltd., South Korea
Volume :
3
fYear :
2004
Firstpage :
1452
Abstract :
This paper describes the design of the control loop of a enhanced dynamic voltage restorer (DVR) controller which can handle power quality problems from not only voltage sag/swell but also harmonics. A novel controller, which has a feed-forward loop and two feed-back loops, is proposed. A feed-back loop is used to actively increase the damping component of LC filter system to keep the output voltage overshoot within allowable range, while a feed-forward loop is used to compensate the voltage drop due to the feedback loop. Another feed-back loop based on the digital repetitive control algorithm is implemented to compensate the periodic harmonics of load voltage, which may come from the source, power converter, and nonlinear load. The feasibility of the proposed DVR controller has been verified by the computer simulation results and also by experimental results on 5 kVA DVR system under the various source and load conditions. The both results reveal satisfactory performance not only against sag/swell but also against harmonics.
Keywords :
compensation; damping; design engineering; digital control; digital simulation; power conversion harmonics; power harmonic filters; power supply quality; voltage regulators; 5 kVA; Controller design; LC filter system; computer simulation; damping component; digital repetitive controller; dynamic voltage restorer; feed-back loop; feed-forward loop; harmonics compensation; nonlinear load; power converter; power quality; voltage drop; voltage sag; voltage swell; Damping; Digital control; Feedback loop; Feedforward systems; Power harmonic filters; Power quality; Power system harmonics; Power system restoration; Voltage control; Voltage fluctuations;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industry Applications Conference, 2004. 39th IAS Annual Meeting. Conference Record of the 2004 IEEE
ISSN :
0197-2618
Print_ISBN :
0-7803-8486-5
Type :
conf
DOI :
10.1109/IAS.2004.1348662
Filename :
1348662
Link To Document :
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