Electromagnetic Torque Fluctuating Properties under Dynamic RISC Fault in Turbogenerators
Yuling He,
Minghao Qiu,
Xinghua Yuan,
Haipeng Wang,
Mengya Jiang,
Chris Gerada,
Shuting Wan
Affiliations
Yuling He
Hebei Key Lab of Electric Machninery Maintenance and Failure Prevention, Department of Mechanical Engineering, North China Electric Power University, Baoding 071003, China
Minghao Qiu
Hebei Key Lab of Electric Machninery Maintenance and Failure Prevention, Department of Mechanical Engineering, North China Electric Power University, Baoding 071003, China
Xinghua Yuan
Hebei Key Lab of Electric Machninery Maintenance and Failure Prevention, Department of Mechanical Engineering, North China Electric Power University, Baoding 071003, China
Haipeng Wang
Hebei Key Lab of Electric Machninery Maintenance and Failure Prevention, Department of Mechanical Engineering, North China Electric Power University, Baoding 071003, China
Mengya Jiang
Hebei Key Lab of Electric Machninery Maintenance and Failure Prevention, Department of Mechanical Engineering, North China Electric Power University, Baoding 071003, China
Chris Gerada
Power Electronics, Machines and Control (PEMC) Research Group, University of Nottingham, Nottingham NG7 2RD, UK
Shuting Wan
Hebei Key Lab of Electric Machninery Maintenance and Failure Prevention, Department of Mechanical Engineering, North China Electric Power University, Baoding 071003, China
This paper analyzes the electromagnetic torque (EMT) fluctuation characteristics in synchronous generators under rotor interturn short-circuit (DRISC) fault. The novelty of this paper is that the DRISC fault is proposed based on the intermittent interturn short circuit existing in the actual operation and compared with the static rotor interturn short-circuit (SRISC) fault. In the work, by studying the influence of DRISC with different positions and different short-circuit degrees, the fluctuation characteristic of the EMT is analyzed and verified. The results show that when the DRISC5% fails, the location is in slot 3, the amplitude of first harmonic decreases by 7.2%, second harmonic amplitude increases by 33.4%, third harmonic decreases by 4.3%, and fourth harmonic increases by 26.8%. As the degree increased and positioned away from the large tooth of the DRISC, the overall EMT amplitude and reverse pulse increased, first and third harmonics decreased, and second and fourth harmonics increased.
