DocumentCode :
1358606
Title :
Dynamic voltage restoration with minimum energy injection
Author :
Choi, S.S. ; Li, B.H. ; Vilathgamuwa, D.M.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Volume :
15
Issue :
1
fYear :
2000
fDate :
2/1/2000 12:00:00 AM
Firstpage :
51
Lastpage :
57
Abstract :
Voltage sag is one of the most important power quality problems challenging the utility industry. Voltage sags can be compensated for by voltage and power injection into the distribution system. By injecting voltage with a phase advance with respect to the sustained source-side voltage, reactive power can be utilized to help voltage restoration. Hence, the consumption of real power, from the perspective of the energy supply device, can be reduced. This energy-saving voltage injection comes at the expense of an increased voltage injection magnitude, load power swing, phase shift, and discontinuity of voltage wave-shape. For this reason, several proposed compensation strategies are examined, in terms of satisfying custom power while taking into consideration the capacity of the energy-storage device and the voltage injection constraint of dynamic voltage restorer. Numerical examples are included to illustrate the efficacy of the proposed control strategies
Keywords :
compensation; energy conservation; energy storage; power system restoration; reactive power; distribution system; dynamic voltage restoration; dynamic voltage restorer; energy-saving voltage injection; energy-storage device; load power swing; minimum energy injection; phase shift; power injection; power quality; power quality problems; reactive power; real power consumption; sustained source-side voltage; voltage injection; voltage injection constraint; voltage injection magnitude increase; voltage sag; voltage sags compensation; voltage wave-shape discontinuity; Delay effects; Energy storage; Impedance; Power quality; Power system control; Power system restoration; Power systems; Reactive power; Voltage control; Voltage fluctuations;
fLanguage :
English
Journal_Title :
Power Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8950
Type :
jour
DOI :
10.1109/59.852100
Filename :
852100
Link To Document :
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