2021
DOI: 10.1049/smt2.12081
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Electric field characteristics of UHV DC tension string during insulator replacement by two workers

Abstract: The UHV DC tension insulator strings are often large-tonnage suspension porcelain or glass insulators with high mechanical strength. The single insulator is heavy, so two workers working at the same time are required to make a replacement on insulator strings in live working conditions. One of the key problems that must be solved in live working conditions is to select an appropriate way to reach the working position and realize the potential transfer between two workers. In this paper, the electric field calc… Show more

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Cited by 2 publications
(1 citation statement)
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“…However, the tower window clearance of the 500kV compact same tower double circuit line is much smaller than the conventional one, the phase spacing is smaller, the movable channel for the operator is limited, the surrounding electric field intensity of the equipotential operator in the tower window is higher than that in the conventional line, and the minimum safety distance condition must be satisfied for the charged operation. Moreover, the jumper of the inner upper-phase conductor of the tension-resistant tower is placed above the upper-phase conductor cross-arm, which is different from the jumper arrangement of the tension-resistant tower of the conventional 500kV line [4] . Conventional 500kV line with electric replacement of insulators is not necessarily applicable to 500kV compact same-tower double-circuit transmission lines.…”
mentioning
confidence: 99%
“…However, the tower window clearance of the 500kV compact same tower double circuit line is much smaller than the conventional one, the phase spacing is smaller, the movable channel for the operator is limited, the surrounding electric field intensity of the equipotential operator in the tower window is higher than that in the conventional line, and the minimum safety distance condition must be satisfied for the charged operation. Moreover, the jumper of the inner upper-phase conductor of the tension-resistant tower is placed above the upper-phase conductor cross-arm, which is different from the jumper arrangement of the tension-resistant tower of the conventional 500kV line [4] . Conventional 500kV line with electric replacement of insulators is not necessarily applicable to 500kV compact same-tower double-circuit transmission lines.…”
mentioning
confidence: 99%