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- Title
Development of a high-speed current limiter for a 6 kV distribution system and evaluation of its effectiveness.
- Authors
Kurioka, H.; Genji, T.; Isozaki, M.; Iwai, H.; Yamada, M.
- Abstract
We have developed a high-speed fault current limiting equipment for a 6 kV distribution system. The main components of this equipment are a high-speed vacuum switch (VCB) and gate turn-off thyristors (GTO) connected in parallel, and a current limiting impedance with low linear resistance in parallel with the switch. The usual load current is carried by the VCB. In case of a power system fault, the fault current is commutated to and interrupted by the GTO on opening the VCB. Tests confirm that the equipment can interrupt an estimated short-circuit current of 13 kArms by limiting to less than 3.5 kAp. The interrupt time was less than 2 ms. This response is about 100 times faster than that of conventional mechanical circuit breakers. The fast interruption current limiter can protect distribution systems within a few ms of a severe short circuit fault occurrence. The primary operational benefit of this equipment is the reduction of instantaneous voltage drop at the bus or on sound lines and of current stress on power system equipment during a power failure. © 1998 Technica, Electr Eng Jpn, 125(3): 11–21, 1998
- Subjects
ELECTRIC current regulators; VACUUM switches; THYRISTORS; ELECTRIC impedance; PARALLEL electric circuits; ELECTRIC power failures; SHORT circuits
- Publication
Electrical Engineering in Japan, 1998, Vol 125, Issue 3, p11
- ISSN
0424-7760
- Publication type
Article
- DOI
10.1002/(sici)1520-6416(19981130)125:3<11::aid-eej2>3.3.co;2-v