Assessment of the number of voltage sags experienced by a large industrial customer

Author

Bollen, M.H.J. ; Tayasanant, T. ; Yalçinkaya, G.

Author_Institution

Dept. of Electr. Power Syst., Chalmers Univ. of Technol., Goteborg, Sweden

fYear

1997

fDate

11-16 May 1997

Firstpage

6

Lastpage

13

Abstract

Circuit theory models are used to estimate the number of voltage sags in the power supply to a paper mill. For every voltage level, the radius of the exposed area (the critical distance) gives the expected number of sags. As the main sensitive load is formed by large adjustable-speed drives, a classification of sags into four types is used. The conclusion of the study is that the equipment should first be made resilient against sags due to single-phase faults at 400 kV. These faults cause the majority of sags. Sags due to three-phase faults are more severe (especially due to faults at 11 kV) but are less common

Keywords

electrical faults; industrial power systems; load (electric); paper industry; power supply quality; power system reliability; power system transients; variable speed drives; 11 kV; 400 kV; adjustable-speed drives; circuit theory models; critical distance; fault classification; paper mill power system; power supply reliability; sensitive load; single-phase faults; three-phase faults; voltage sags assessment; Circuit faults; Electricity supply industry; Impedance; Paper mills; Power quality; Production; Substations; Variable speed drives; Voltage fluctuations; Windings;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial and Commercial Power Systems Technical Conference, 1997. Conference Record, Papers Presented at the 1997 Annual Meeting., IEEE 1997

Conference_Location

Philadelphia, PA

Print_ISBN

0-7803-3825-1

Type

conf

DOI

10.1109/ICPS.1997.595980

Filename

595980