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Mobile alternating-current ice melting device for power transmission line

A transmission line and mobile technology, applied in the installation of cables, electrical components, overhead installation, etc., can solve the problems that threaten the safe operation of substations, the difficulty of building special ice-melting facilities, and affect the safe and reliable use of electricity for users, and achieve good economics. Benefits and application prospects, the effect of shortening the time of ice-melting operations and improving the efficiency of ice-melting work

Active Publication Date: 2012-09-19
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] In the existing technology, after the transmission line is covered with ice, it may cause equipment damage such as wire breakage and tower overturning. During the process of ice coating falling off, it may cause multiple short-circuit tripping of the line, which seriously threatens the safe operation of the substation and affects the safety of users. Safe and reliable electricity use
The daily temperature in Northeast China varies greatly. After the wire is covered with ice, the temperature will drop sharply, and the ice will last for a long time, making it extremely difficult to remove.
At present, most mobile ice-melting devices adopt DC ice-melting solutions, which require high-current power electronic rectification equipment, which are complex and expensive; AC ice-melting devices mostly use fixed structures, with many equipment configuration points and high cost.
Combined with the site reality, the 66kV substation currently in operation has no ice-melting facilities, and it is difficult to build dedicated ice-melting facilities due to site restrictions. This patent proposes a specific solution to this

Method used

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  • Mobile alternating-current ice melting device for power transmission line
  • Mobile alternating-current ice melting device for power transmission line
  • Mobile alternating-current ice melting device for power transmission line

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Embodiment Construction

[0025] see figure 1 , the transmission line mobile AC deicing device is placed on the truck, and the device is composed of a connected switch cabinet 21 and a series compensation capacitor 22; a discharge coil 23 and an overvoltage protection damping discharge gap 24 are connected in parallel on the series compensation capacitor 22; the device There are terminals connected to the power transformer and the ice-melting circuit 25 respectively. The terminal is connected with the power transformer and the ice-melting circuit 25 through the quick assembly line bracket and the quick connection clamp.

[0026] The device is mainly used for AC melting of 66kV power grid LGJ-150~240-type wires with 10kV voltage level as the ice-melting power supply, and at the same time considers meeting the AC melting requirements of LGJ-400 type wires under normal conditions; Generally, the ice-melting range is 50 kilometers, and it can be expanded to more than 100 kilometers for lines with intermed...

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Abstract

The invention relates to a mobile AC (Alternating-Current) ice melting device for a power transmission line in a power system, in particular to a mobile AC ice melting device for a power transmission line of 66 kV. The device is arranged on a truck and consists of a switch cabinet and a series compensation capacitor which are connected, wherein the series compensation capacitor is provided with a discharge coil and an over-voltage protection damping discharge gap which are connected in parallel; and the device has connecting ends respectively connected with a power supply transformer and an ice melting line. When the mobile AC ice melting device is in use, the connecting ends are connected with the power supply transformer and the ice melting line through a quick assembly line and a quick connecting clamp. The device has the advantages of simple principle, flexibility and quickness, large applicable scope, high deicing efficiency, safety and reliability, the normal operation of an ice coating line can be quickly recovered, and the economic efficiency and the application prospect are better.

Description

[0001] [0002] technical field [0003] The invention relates to a mobile AC ice-melting device for a transmission line of a power system, and is especially suitable for a mobile AC ice-melting device for a 66kV transmission line. Background technique [0004] In the existing technology, after the transmission line is covered with ice, it may cause equipment damage such as wire breakage and tower overturning. During the process of ice coating falling off, it may cause multiple short-circuit tripping of the line, which seriously threatens the safe operation of the substation and affects the safety of users. Safe and reliable electricity use. The daily temperature changes greatly in Northeast China. After the wire is covered with ice, the temperature will drop sharply, and the ice will last for a long time, making it extremely difficult to remove. At present, most mobile ice-melting devices adopt DC ice-melting solutions, which require high-current power electronic rectifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G7/16
Inventor 曹琪赵栩杨凯全吴鑫强郑金鹏于建友刘明刘斌
Owner STATE GRID CORP OF CHINA
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