Power transmission line tortuous serial ground wire ice melting method

Abstract

The invention provides a power transmission line tortuous serial ground wire ice melting method. According to the method, three ground wires of a single loop in an ice melting segment are connected in series. The method specifically comprises the following steps: connecting a ground wire at the side of a dual loop to the head end of the first ground wire of the single loop at a first dual-loop branch tower, and at the same time, connecting head ends of the second ground wire and the third ground wire of the single loop; at a next dual-loop branch tower, tail ends of the first ground wire and the second ground wire of the loop are connected, and at the same time, the tail end of the third ground wire of the loop is connected with the ground wire at the side of the dual loop; and an electrical on-off point is arranged, an ice melting ground wire section is determined, a power supply anode is connected with one side of a ground wire on-off point through a lead wire of one phase, a power supply cathode is connected with the other side of the ground wire on-off point through a lead wire of the other phase, and thus tortuous serial connection is realized at a time. After a tortuous serial connection novel ice melting mode is employed, under the condition that it is ensured that the safety and the reliability of a power transmission line are not reduced, the ground wire ice melting problem can be effectively solved.

Description

technical field [0001] The invention relates to the field of ice-melting ground wires of power transmission line engineering, in particular to a method for melting ice of ground wires in circuitous series connection of power transmission lines. Background technique [0002] Atmospheric abnormalities, frequent natural disasters, low-temperature rain and snow freezing disasters have caused large-scale power outages in the power grid, seriously affecting the national economy and people's lives. In order to "build a power grid that the people can rest assured", the power sector has improved the construction standards of the power grid and launched the research and application of ice-melting technology. [0003] The use of the ice-melting device has effectively prevented the accidents of tower collapse and disconnection. At present, ice melting is mainly carried out for wires. Ground wires have not been melted due to the limitation of operating conditions (segmented insulation o...

AI Technical Summary

Problems solved by technology

At present, the ice melting is mainly carried out on the wires, and the ground wires have not been melted due to the limitation of operating conditions (segmented insulation or direct grounding), high DC power supply voltage, and equipment manufacturing difficulties.

However, the ground wire has become the most vulnerable link of the transmission line, and the icing is often the first to cause damage or slippage of the ground wire, causing the line to trip and stop.

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