US 11,722,079 B2
Detection system and method for rotor dynamic turn-to-turn short circuit fault of synchronous generator
Yuling He, Baoding (CN); Minghao Qiu, Baoding (CN); Chenkai Sun, Baoding (CN); Mengya Jiang, Baoding (CN); Xinghua Yuan, Baoding (CN); and Xiaolong Wang, Baoding (CN)
Filed by NORTH CHINA ELECTRIC POWER UNIVERSITY (BAODING), Baoding (CN)
Filed on Apr. 13, 2022, as Appl. No. 17/719,695.
Claims priority of application No. 202110624205.7 (CN), filed on Jun. 4, 2021.
Prior Publication US 2022/0393625 A1, Dec. 8, 2022
Int. Cl. H02P 9/00 (2006.01)
CPC H02P 9/006 (2013.01) 6 Claims
OG exemplary drawing
 
1. A detection system for rotor dynamic turn-to-turn short circuit fault of synchronous generator, comprising a motor, a synchronous generator, a current transformer, an acquisition card, an infrared temperature sensor, a temperature acquisition instrument and a control terminal; wherein the motor is drivingly connected with the synchronous generator, three-phase taps of stator winding of the synchronous generator pass through the current transformer respectively, the current transformer is electrically connected with the acquisition card, the infrared temperature sensor is set corresponding to rotor winding of the synchronous generator, and the infrared temperature sensor is electrically connected with the temperature acquisition instrument, and the acquisition card and the temperature acquisition instrument are electrically connected with the control terminal;
the current transformer measures a three-phase current signal of the stator winding of the synchronous generator in real time, and transmits the three-phase current signal of the stator winding to the control terminal through the acquisition card;
the infrared temperature sensor measures a temperature signal of the rotor winding of the synchronous generator in real time, and transmits the temperature signal of the rotor winding to the control terminal through the temperature acquisition instrument; and
the control terminal converts the three-phase current signal of the stator winding into a spectrum signal, compares different spectrum components of the spectrum signal with corresponding spectrum components of a normal three-phase current of the stator winding, and compares the temperature signal of the rotor winding with a normal temperature data sample of the rotor winding; when it is determined that both of the three-phase current signal of the stator winding and the temperature signal of the rotor winding are abnormal, the control terminal outputs a rotor winding dynamic turn-to-turn short circuit fault signal; and the control terminal also determines a location of the rotor winding dynamic turn-to-turn short circuit fault according to a rotor winding number corresponding to the abnormal temperature signal of the rotor winding.