Title :
Power quality analysis and improvement of DC arc furnace load
Author :
Fu, Tsu-Hsun ; Wu, Chi-Jui
Author_Institution :
Dept. of Electr. Eng., Ching Ming Coll. of Technol. & Commerce, Miaoli County, Taiwan
Abstract :
In this paper, the power quality problems of a DC arc furnace load are investigated. An 18-pulse converter is used to provide the DC currents to the furnace. The power quality problems concerned are the harmonics and voltage flicker (voltage fluctuation). Field measurement is used to reveal the harmonic distributions of the rectifiers under balanced and unbalanced conditions. The effect of passive harmonic filters is also investigated. Although the DC arc furnace is operated in constant current mode, there is still an obvious reactive power variation to cause voltage flicker. Statistics is used to reveal the load fluctuation. Finally, a feasible reactive power compensation scheme with instantaneous values is studied to mitigate the voltage flicker problem.
Keywords :
arc furnaces; compensation; passive filters; power conversion harmonics; power harmonic filters; power supply quality; reactive power; rectifying circuits; 100 MVA; 161 kV; 18-pulse converter; 22.8 kV; DC arc furnace load; balanced conditions; constant current mode; harmonic distributions; harmonics; load fluctuation; passive harmonic filters; power quality analysis; reactive power compensation scheme; reactive power variation; rectifiers; statistics; unbalanced conditions; voltage flicker; voltage fluctuation; Furnaces; Power quality; Power system harmonics; Production facilities; Pulse width modulation; Reactive power; Rectifiers; Steel; Substations; Voltage fluctuations;
Conference_Titel :
TENCON '02. Proceedings. 2002 IEEE Region 10 Conference on Computers, Communications, Control and Power Engineering
Print_ISBN :
0-7803-7490-8
DOI :
10.1109/TENCON.2002.1182717
