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A high impedance fault (HIF) is generated when an energized conductor (of a primary feeder) makes contact with the ground or with neighboring objects such as branch trees, overgrown vegetation, building walls, asphalt, any object to ground. Such faults are undetectable by conventional overcurrent devices such as overcurrent relays and fuses because their low current magnitude. Furthermore, arcing...
In the Nordic countries, most distribution networks are installed in forest areas. Direct strokes to a tree can cause severe damage to nearby power lines by initiating an arc channel through air to bare conductors. In this paper, this phenomenon is examined experimentally using a full-scale laboratory setup considering dry-air and wet-air conditions, and the experimental results were reproduced by...
This paper presents a general approach to locate any type of fault on either a single-circuit or a double-circuit transmission line when only current magnitude measurements are available. Emphasis is given to double-circuit line. The distinctive feature of the proposed fault location method is the current measurements employed can be from one or more branches, which are not restricted to those of...
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