Title :
Application of GPT to tanδ measuring apparatus for distribution cable in hot line
Author :
Iga, A. ; Aihara, M. ; Fujiwara, Y. ; Kawai, J.
Author_Institution :
Shikoku Res. Inst. Inc., Takamatsu, Japan
fDate :
7/1/1991 12:00:00 AM
Abstract :
A hot line tanδ measuring apparatus which uses the secondary voltage of GPTs (grounding potential transformers) existing at substations and other facilities has been developed. An error vector circle diagram method which allows one to determine the value of tanδ to an accuracy of 0.1%, notwithstanding the phase difference existing between the primary and secondary voltages of a GPT, is described. The method was used in field experiments with favorable results. The method is especially superior in terms of safety and operability because no contact with high-voltage portions is required
Keywords :
potential transformers; power cables; voltage measurement; distribution cable; error vector circle diagram method; grounding potential transformers; hot line; operability; phase difference; primary voltage; safety; secondary voltage; substations; tanδ measuring apparatus; Cable insulation; Circuit testing; Current measurement; Dielectric measurements; Grounding; Power cables; Power measurement; Signal detection; Substations; Voltage;
Journal_Title :
Power Delivery, IEEE Transactions on
