Title :
Before and during voltage sags
Author :
Carlsson, Fredrik
Author_Institution :
KTH, Stockholm, Sweden
Abstract :
The relationship between the voltages and the tripping level for line-operated synchronous machines is discussed. Voltage sags may cause tripping and large torque peaks in electrical machines. Tripping is caused by undervoltage protection or overcurrent protection. The ability to keep synchronism for the synchronous machines is mostly related to the loading of the machine and not very related to the voltage before and after the voltage sag.
Keywords :
overcurrent protection; power supply quality; synchronous machines; line-operated synchronous machines; machine loading; overcurrent protection; synchronism; torque peaks; tripping; undervoltage protection; voltage sags; Industrial relations; Lightning; Power quality; Pressing; Protection; Shafts; Shape; Synchronous machines; Torque; Voltage fluctuations;
Journal_Title :
Industry Applications Magazine, IEEE
DOI :
10.1109/MIA.2005.1405825
