Title :
A PC based ground impedance measurement instrument
Author :
MelioPoulos, A. P Sakis ; Cokkinides, George ; Abdallah, Hanna ; Duong, Steven ; Patel, Shashi
Author_Institution :
Sch. of Electr. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
fDate :
7/1/1993 12:00:00 AM
Abstract :
A PC-based instrument for ground impedance measurements is presented. The instrument injects a transient electric current between the ground under measurement and an auxiliary ground, and it measures ground potential differences (GPDs) around the ground under measurement. The GPD measurements are processed with software which rejects external noise by the use of correlation methods. Estimation methods are used to extract the ground potential rise and ground impedance. The final result is the ground impedance versus frequency in a user-selected frequency range. The instrument has been constructed and field tested by three electric utilities.<>
Keywords :
computerised instrumentation; earthing; electric impedance measurement; microcomputer applications; power system measurement; PC; computerised instrumentation; correlation methods; earthing; electric utilities; external noise; ground impedance measurement; ground potential differences; instrument; power system measurement; software;
Journal_Title :
Power Delivery, IEEE Transactions on
