Voltage flicker prediction for two simultaneously operated AC arc furnaces

Author

Tang, Le ; Kolluri, Sharma ; McGranaghan, Mark F.

Author_Institution

ABB Power T&D Co. Inc., Raleigh, NC, USA

Volume

12

Issue

2

fYear

1997

fDate

4/1/1997 12:00:00 AM

Firstpage

985

Lastpage

992

Abstract

An EMTP-based arc furnace model was developed for evaluation of flicker concerns associated with supplying a large integrated steel mill as they go from one to two furnace operation and as system changes are implemented that will affect the short circuit capacity at the 230 kV power supply substation. The model includes a dynamic arc representation which is designed to be characteristic of the initial portions of the melt cycle when the arc characteristics are the most variable (worst flicker conditions). The flicker calculations are verified using previous measurements with one furnace operation. Flicker simulations were then performed to evaluate a variety of different possible system strengths with both one and two furnaces in operation. The primary flicker measure used for this study is the unweighted RMS value of the fluctuation envelope, expressed as a percentage of the RMS line-to-ground voltage magnitude

Keywords

arc furnaces; power supplies to apparatus; short-circuit currents; steel industry; substations; 230 kV; RMS line-to-ground voltage magnitude; dynamic arc representation; flicker simulations; fluctuation envelope; integrated steel mill supply; melt cycle; power supply substation; short circuit capacity; simultaneously operated AC arc furnaces; unweighted RMS value; voltage flicker prediction; Frequency measurement; Furnaces; IEC standards; Lamps; Milling machines; Performance evaluation; Power system modeling; Steel; USA Councils; Voltage fluctuations;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.584424

Filename

584424