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access icon free Analysis of electrical shock hazard caused by electromagnetic coupling effects in parallel overhead high-voltage power lines

© The Institution of Engineering and Technology
Received 28/11/2017, Accepted 06/05/2018, Revised 21/03/2018, Published 09/05/2018

The development of power networks encounters numerous problems. On one hand, they result from the high cost of land lots and difficulties in acquiring them from the proprietors. On the other hand, there are technical obstacles related to the constructing lines between new power sources (e.g. wind farms) and power systems. Wind farms are frequently localised in areas where the power network is poorly developed. These difficulties necessitate specific ways in which wind farms can be connected with the existing power systems. One of them lies in locating new lines within the existing line right of way. Owing to the electromagnetic impact between the lines such solutions are not frequent. Too long close-proximity sections are avoided to reduce the consequences this impact. This study is devoted to the influence of high-voltage transmission lines on other power lines. The localisation options in a 400 kV line right of way are analysed. The construction process and further exploitation of a 110 kV line in normal and short-circuit conditions of a 400 kV line are presented. The prospective touch voltages and body currents are determined for these conditions.

Inspec keywords: electric shocks; power cables; power overhead lines; electromagnetic coupling; hazards; wind power plants; power transmission lines

Other keywords: high-voltage transmission lines; touch voltages; voltage 110 kV; voltage 400 kV; parallel overhead high-voltage power lines; electromagnetic coupling effects; electrical shock hazard analysis; close-proximity sections; power networks; power sources; body currents; construction process; wind farms; power systems; short-circuit conditions

Subjects: Overhead power lines; Power cables; Wind power plants; Plant engineering, maintenance and safety

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