Title :
A novel technique for measuring grounding capacitance and grounding fault resistance in ineffectively grounded systems
Author :
Zeng, Xiangjun ; Yin, Xianggen ; Chen, Deshu
Author_Institution :
Dept. of Electr. Power Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China
fDate :
3/1/2001 12:00:00 AM
Abstract :
A principle for resonance measurement based on injecting resonant frequency signal is presented in this paper. The grounding capacitance of lines and equipment and the grounding fault resistance can be measured online in ineffectively grounded systems. Petersen-coil automatic tuning is implemented, and 100% stator grounding fault protection for generator stator windings is also proposed. The prototype for Petersen-coil tuning has been tested on networks for many years. In addition, the new method for generator stator grounding fault protection is verified by simulation
Keywords :
capacitance measurement; earthing; electric generators; electric resistance measurement; electrical faults; machine protection; machine testing; Petersen-coil automatic tuning; generator stator windings; grounding capacitance measurement; grounding fault resistance measurement; ineffectively grounded systems; resonance measurement; resonant frequency signal injection; stator grounding fault protection; Capacitance measurement; Electrical resistance measurement; Frequency measurement; Grounding; Protection; Prototypes; Resonance; Resonant frequency; Stator windings; Tuning;
Journal_Title :
Power Engineering Review, IEEE
