In:
Electrical Engineering in Japan, Wiley, Vol. 115, No. 5 ( 1995-08), p. 10-21
Abstract:
This paper presents a new scheme of protection and fault location in multiterminal high‐voltage lines. The new protection scheme is PCM (Pulse Code Modulation) current differential protection using OPGW (Optical Fiber Ground Wire). This scheme can be applied to protection up to 8‐terminal transmission lines. This scheme has coped with the miss trip in the cause of CT‐saturation. But this may have an opposite result, i.e., obstruction of trip during 4‐cycle. Then, the index to cope with the miss trip for CT‐saturation is proposed. The aforementioned system obtains various information at each terminal (e.g., current data and CB‐condition, et al.). Then, a fault location scheme is developed using this information. It has two kinds of techniques using the synchronized current data of multi‐terminal lines. One technique is to measure the current diversion ratio with current of each terminal. The other technique is to measure impedance using current of each terminal and voltage. This scheme can automatically choose between the two technique at fault type. The equipment using this scheme has obtained a good result in the field.
Type of Medium:
Online Resource
ISSN:
0424-7760
,
1520-6416
DOI:
10.1002/eej.4391150502
Language:
English
Publisher:
Wiley
Publication Date:
1995
detail.hit.zdb_id:
1480222-3
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