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Simulations of a synchronous machine affected by voltage sags
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| Author(s) |
F. Carlsson; J. Engström; C. Sadarangani |
| Abstract |
Voltage sags and interruptions are a big power quality problem for the industry. Protection
equipment automatically breaks the circuit when the power quality is degraded too much. In many
cases short voltage sags or interruptions that lasts for only a hundred milliseconds leads to stoppage
for hours in the production. This is mainly due to long start-up times of the industrial process.
Simulations have been done on a blast furnace blower in the steel plant SSAB Oxelösund in Sweden.
A line operated synchronous machine powers this. If the remaining voltage is higher than 55% there
is no need to break at all. These results show that changing the settings in the protection equipment
may reduce the number of unwanted shutdowns. In addition, much attention has been paid to the torque variations during and after the sag, and how it depends on the duration of the voltage sag. |
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| Filename: | EPE2001 - PP01240 - Carlsson.pdf |
| Filesize: | 203.4 KB |
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| Type |
Members Only |
| Date |
Last modified 2004-03-11 by System |
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