Title :
Ride-Through of Medium Voltage Synchronous Machine Centrifugal Compressor Drives
Author :
Endrejat, Frieder ; Pillay, Pragasen
Author_Institution :
Sasol Technol., Secunda, South Africa
Abstract :
Medium voltage (MV) synchronous machines (SMs) are expected to ride through adjustable speed drive (ASD) faults, excitation faults, system faults/disturbances and supply transfers. Models suitable for direct-on-line and ASD ride-through simulations are discussed. Case studies, simulation and test results are presented for an 11 kV ASD for 17 MW SMs and for a 55 MW SM. It is shown that line fed and ASD fed SMs can survive system faults and voltage dips without additional compensation or energy storage. ASD fed SMs have far better survivability characteristics than line fed SMs. SMs can ride through ASD faults associated with fault tolerant schemes when correctly configured. Boundary supply transfer angles are determined to eliminate unacceptable transients. Aspects requiring special attention for SMs in addition to the induction motor (IM) ride-trough requirements are highlighted. Recommendations are provided to improve availability of ASD started/driven SMs.
Keywords :
fault tolerance; induction motor drives; power supply quality; reliability; synchronous machines; variable speed drives; ASD fed SM; ASD started-driven SM; IM ride-trough requirement; MVSM centrifugal compressor drive; boundary supply transfer angle; direct-on-line simulation; energy storage; excitation fault; fault tolerant scheme; induction motor ride-trough requirement; line fed SM; medium voltage synchronous machine centrifugal compressor drive; power 17 MW; power 55 MW; ride through ASD fault; ride through adjustable speed drive fault; supply transfer; system fault-disturbance; voltage 11 kV; voltage dip; Equations; Power system dynamics; Power system stability; Synchronous motors; Variable speed drives; Voltage fluctuations; Availability; fault tolerance; petroleum industry; power quality; power system dynamic stability; synchronous machines (SMs); synchronous motor drives;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2011.2153816
