Increasing refiner production by using motor thermal capacity for protection and control
Journal Article
·
· IEEE Transactions on Industry Applications
- Grainger Electrical Research Ltd., Edmonton, Alberta (Canada)
- Alberta Energy Co., Calgary, Alberta (Canada)
Industrial motors are typically controlled and operated by closely monitoring the stator winding temperatures and limiting the phase currents within the motor manufacturer`s full-load ampacity rating. A different approach to motor operation and control was implemented at the Blue Ridge Lumber medium density fiberboard (MDF) plant at Whitecourt, Alta., Canada. The capacity control of the refiner is based on using the remaining thermal capacity of the motor as the primary control parameter. In this installation, a 4,000-hp totally enclosed water air cooled (TEWAC) squirrel-cage induction motor is continuously operating above the manufacturer`s rated full-load current, but is being controlled by maintaining thermal capacity at 50%. Temporary current loadings well above this are permitted for up to several minutes to accommodate variations in the wood feed stock to the refiner. This was implemented by installing a modern motor protection relay, communication with a programmable logic controller (PLC) system, and the development of operator interface displays to provide plant operators with the necessary information to monitor the motor parameters. Factors which needed to be considered were the electrical power system limitations, the motor cooling effectiveness, and mechanical limitations imposed by the refiner shaft design.
- OSTI ID:
- 522381
- Journal Information:
- IEEE Transactions on Industry Applications, Journal Name: IEEE Transactions on Industry Applications Journal Issue: 3 Vol. 33; ISSN 0093-9994; ISSN ITIACR
- Country of Publication:
- United States
- Language:
- English
Similar Records
Energy economizing ac power control system
High-Temperature Multi-Process Sensor Development for a PC-Fired Unit
High-Temperature Multi-Process Sensor Development and Demonstration at a Full-scale PC Combustion System
Patent
·
Mon Nov 26 23:00:00 EST 1979
·
OSTI ID:5420261
High-Temperature Multi-Process Sensor Development for a PC-Fired Unit
Conference
·
Thu Jul 29 00:00:00 EDT 2021
·
OSTI ID:2248133
High-Temperature Multi-Process Sensor Development and Demonstration at a Full-scale PC Combustion System
Conference
·
Mon Oct 11 00:00:00 EDT 2021
·
OSTI ID:2248134