Current Transformer Type Transmission Line Conductor Thermal Icing Device Compensated by Secondary Capacitor

Abstract

The invention discloses a secondary capacitor compensating current transformer type heating ice-melting device for transmission line wires. The device is composed of a cylindrical sleeve-shaped tilting fillet capable of being opened and closed, an iron core and a remotely controlled movement mechanism. The iron core is provided with two windings, one winding is connected with an electric stove wire embedded in the tilting fillet, and the other winding supplies power to the movement mechanism. The secondary capacitor compensating current transformer type heating ice-melting device for the transmission line wires has the advantages that line outage is not required, live working is achieved, a system device running state is not changed, no influence is caused to a system running mode, and potential safety hazards of a power grid and direct and indirect economic loss which are caused by power outage are avoided.

Description

technical field [0001] The invention relates to the field of deicing wires of transmission lines, in particular to a current transformer type power transmission line wire heat-melting device for secondary capacitor compensation. Background technique [0002] At present, there are two main deicing methods for transmission lines at home and abroad: (1) thermal deicing method; (2) mechanical deicing method. [0003] (1) thermal ice melting method [0004] This method mainly includes over-current ice-melting method, short-circuit current method, DC current ice-melting method, and intermediate frequency current ice-melting method. [0005] The over-current ice-melting method changes the power flow distribution of the power grid through scientific dispatching, so that the line current reaches above the critical current for icing. The advantage of increasing the transmission load current of the line is that it does not need to interrupt the power supply to improve the reliability...

AI Technical Summary

Problems solved by technology

The advantage of increasing the transmission load current of the line is that it does not need to interrupt the power supply to improve the reliability of the power grid, which is simple and easy to implement, but the disadvantage is that it cannot melt the ice of the lightning protection line. In addition, changing the power flow distribution of the power grid may not necessarily make the line current reach the critical current of ice coating above

The disadvantage is that the intermediate frequency power supply unit is expensive, and the line needs to be out of operation

[0009] A common disadvantage of the above-mentioned methods is that because it is difficult to provide power in the middle of the line, the ice melting range can only start from the station to a certain middle point of the line, or even the entire line, and it is impossible to melt ice in areas with severe ice cover alone. Lines that are not covered with ice or are not seriously covered with ice also pass through large currents, which increases power loss and increases the capacity of the ice-melting device accordingly

The de-icing technology of vibrating frozen transmission line conductors and guy wires by external vibrators is difficult to be adopted in practical engineering because it requires an external vibration source and vibration accelerates cable fatigue

[0012] In addition, there are some new methods, such as infrared deicing, laser deicing, electric pulse method, etc., but they are all in the research stage, and it is difficult to promote them.

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