Electromechanical Characteristics Analysis under DSISC Fault in Synchronous Generators
Yu-Ling He,
Ming-Hao Qiu,
Xing-Hua Yuan,
Xian-Long He,
Hai-Peng Wang,
Meng-Ya Jiang,
Chris Gerada,
Shu-Ting Wan
Affiliations
Yu-Ling He
Department of Mechanical Engineering, Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China
Ming-Hao Qiu
Department of Mechanical Engineering, Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China
Xing-Hua Yuan
Department of Mechanical Engineering, Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China
Xian-Long He
Zhenchuang Electronic Technology Company, Sanhe 065201, China
Hai-Peng Wang
Department of Mechanical Engineering, Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China
Meng-Ya Jiang
Department of Mechanical Engineering, Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, 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
Shu-Ting Wan
Department of Mechanical Engineering, Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China
This paper studies the electromechanical characteristics of synchronous generators under dynamic stator interturn short circuit (DSISC). First, the air gap magnetic flux density (MFD) of the generator under normal and DSISC fault was obtained. Then, the expression for the phase current and the electromagnetic torque (EMT) were obtained. After this, the phase current and EMT were analyzed by finite element analysis (FEA). Finally, the measured electromechanical characteristics of the CS-5 generator under different conditions were analyzed in accordance with theory and simulation. It was shown that with the occurrence, and deterioration, of DSISC, the amplitude of the first harmonic, third harmonic and fifth harmonic of the phase current became more affected by the pulse. Meanwhile, the even-numbered harmonics components of EMT increased.
