A new brushless excitation system with the modified microcomputer-based regulator developed by NARI was put into operation recently on a 300 MW #4 generator, Hanchuan plant, Hubei province. The hardware and software i...A new brushless excitation system with the modified microcomputer-based regulator developed by NARI was put into operation recently on a 300 MW #4 generator, Hanchuan plant, Hubei province. The hardware and software implementation of the regulator is briefly described in the paper. The onsite smooth operation of the generator with this excitation system proves that the system is quite展开更多
With a three-phase bridge type rectification, some typical rotor faults of a brushless AC generator with a rotary rectifier is analyzed in this paper by the help of computer digital simulation. It is also proPOsed tha...With a three-phase bridge type rectification, some typical rotor faults of a brushless AC generator with a rotary rectifier is analyzed in this paper by the help of computer digital simulation. It is also proPOsed that the rotor faults, whether exist or not, and the causes of the faults may be determined through the monitoring of the average value of the exciting current of the exciter and its principal harmonics.展开更多
A brushless electrically excited synchronous generator （BEESG） with a hybrid rotor is a novel electrically excited synchronous generator. The BEESG proposed in this paper is composed of a conventional stator with tw...A brushless electrically excited synchronous generator （BEESG） with a hybrid rotor is a novel electrically excited synchronous generator. The BEESG proposed in this paper is composed of a conventional stator with two different sets of windings with different pole numbers, and a hybrid rotor with powerful coupling capacity. The pole number of the rotor is different from those of the stator windings. Thus, an analysis method different from that applied to conventional generators should be applied to the BEESG. In view of this problem, the equivalent circuit and electromagnetic torque expression of the BEESG are derived on the basis of electromagnetic relation of the proposed generator. The generator is simulated and tested experimentally using the established equivalent circuit model. The experimental and simulation data are then analyzed and compared. Results show the validity of the equivalent circuit model.展开更多
文摘A new brushless excitation system with the modified microcomputer-based regulator developed by NARI was put into operation recently on a 300 MW #4 generator, Hanchuan plant, Hubei province. The hardware and software implementation of the regulator is briefly described in the paper. The onsite smooth operation of the generator with this excitation system proves that the system is quite
文摘With a three-phase bridge type rectification, some typical rotor faults of a brushless AC generator with a rotary rectifier is analyzed in this paper by the help of computer digital simulation. It is also proPOsed that the rotor faults, whether exist or not, and the causes of the faults may be determined through the monitoring of the average value of the exciting current of the exciter and its principal harmonics.
基金This work was supported by the Key Projects of the National Natural Science Foundation of China （Grant No. 51537007） and the National Natural Science Foundation of China （Grant No. 51277125）.
文摘A brushless electrically excited synchronous generator （BEESG） with a hybrid rotor is a novel electrically excited synchronous generator. The BEESG proposed in this paper is composed of a conventional stator with two different sets of windings with different pole numbers, and a hybrid rotor with powerful coupling capacity. The pole number of the rotor is different from those of the stator windings. Thus, an analysis method different from that applied to conventional generators should be applied to the BEESG. In view of this problem, the equivalent circuit and electromagnetic torque expression of the BEESG are derived on the basis of electromagnetic relation of the proposed generator. The generator is simulated and tested experimentally using the established equivalent circuit model. The experimental and simulation data are then analyzed and compared. Results show the validity of the equivalent circuit model.
