关键词: 输电线路, 线路故障, 故障分析, 脱冰跳跃

Abstract: This paper studies the ice-shedding jumping characteristics and typical ice-shedding modes of overhead transmission lines in micro-terrain areas,based on the data from ice-shedding jumping faults that occurred during rainy, snowy, and freezing weather in a certain area of the central China power grid in recent years. At the same time, a new anti ice-shedding jumping control strategy is proposed to solve the problem that ice-shedding jumping faults of transmission line is easy to occur in micro-terrain areas.The strategy takes the high voltage end fixed connection fittings, insulation spacers and fixed cables as the core. The high voltage end of the insulation spacer is connected to the wire through the high voltage end fixed connection fittings, and the low voltage end of the insulation spacer is connected to the fixed cable through the con‍nec‍tion fittings. The near ground end of the fixed cable is forcibly fixed to the ground. By reasonably distributing the installation positions, it can effectively suppress the ice-shedding jumping amplitude of the transmission lines. The feasibility and efficiency of this strategy are evaluated through experimental analysis.

Key words: overhead transmission lines, transmission line fault, fault analysis, ice-shedding jumping