Explanation to irregularities in the dependence between voltage sag magnitude and the tripping level for line operated synchronous machines

Author

Carlsson, Fredrik

Author_Institution

Dept. of Electr. Eng., KTH, Stockholm, Sweden

Volume

2

fYear

2003

fDate

12-16 Oct. 2003

Firstpage

1058

Abstract

Voltage sags are huge power quality problems for many industries. Voltage sags may cause tripping, production disturbances and equipment damages. Undervoltage tripping is one way of protecting equipment from getting damaged due to overcurrent during voltage sags. However, the undervoltage protection is usually set to break at an absolute voltage magnitude instead of at a relative voltage magnitude change. This may lead to both unnecessary tripping and nontripping when necessary.

Keywords

machine protection; overcurrent protection; power supply quality; synchronous machines; absolute voltage magnitude; equipment damage; equipment protection; line operated synchronous machines; nontripping; overcurrent; peak torque; power quality problems; production disturbances; tripping; tripping level; undervoltage tripping; unnecessary tripping; voltage sag magnitude; voltage sags; Electrical equipment industry; Machinery production industries; Power quality; Pressing; Protection; Shafts; Shape; Synchronous machines; Torque; Voltage fluctuations;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 2003. 38th IAS Annual Meeting. Conference Record of the

Print_ISBN

0-7803-7883-0

Type

conf

DOI

10.1109/IAS.2003.1257677

Filename

1257677