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 :
5/1/2000 12:00:00 AM
Abstract :
A principle for resonance measurement based on injecting a resonant frequency signal is presented in this letter. Using this principle, the grounding capacitance of lines and equipment and the grounding fault resistance can be measured on-line in ineffectively grounded systems. Based on this, 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. The new method for generator stator grounding fault protection is verified by simulation
Keywords :
capacitance measurement; coils; earthing; electric generators; machine protection; power distribution faults; power system measurement; stators; Petersen-coil automatic tuning; distribution systems; generator stator grounding fault protection; generator stator windings; grounding capacitance measurement; grounding fault resistance measurement; ineffectively grounded systems; 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
