Ice and snow fusion method for air power transmission line

Abstract

The present invention provides a method for melting the ice on the overhead electric transmission line, under the original load of the three-phase electric transmission line by connecting the major loop of the thyristor between each phase line of the circuit with ice and the earth standing for the zero potential through an electric brake, the phases are respectively obtained from three phase lines, the phase signals are accessed into the respective pulse generator to generate lower-edge positive pulse by each generator, the positive pulse is used for triggering the control pole of thyristor in a same phase line to lead to the earth-conducting of the thyristor in order to increase the heat generating quantity of the conducting wire, the pulse generator is also provided with a pulse triggering time regulator with which the conducting time of the thyristor is controlled to lead to that the heat generating quantity of the electric transmission line confirms to the requirement for melting the ice thereby realizing the purpose that the power is not off when the ice is melted on the overhead electric transmission line.

Description

technical field [0001] A method for melting ice and snow on electric wires, in particular to a method for melting ice and snow on overhead transmission lines. Background technique [0002] To transmit power to users from a distance, the wires must be placed on elevated insulated towers, but when it snows in winter, snowflakes fall on the wires and freeze, forming ice and snow lines, and the ice and snow accumulate thicker and thicker, making the wires The weight increased greatly, causing accidents such as short circuit, breakage of wires, and the toppling of the column towers on which the wires were erected. For example, the ice and snow lines formed by the heavy snow in early 2008 caused huge losses to the southern region. However, the current deicing method mainly relies on artificial deicing. In Canada, there is also a kind of electric deicing vehicle, which drives the car under the frozen wire, connects the low-voltage current to the two ends of the wire, and removes th...

AI Technical Summary

Problems solved by technology

However, this kind of vehicle must generate a lot of electric energy, which is expensive and inefficient. It is powerless for long-distance snow accumulation on wires, so it is not practical. Some people also advocate adding a line for heating and deicing on the high-voltage line. Alternate power transmission, but in this way, the heat generated by the original transmission line cannot be used, and the second is to add a line

In short, these are the full-time step-down short-circuit method, so the heat generated by the original load current cannot be used, and the work can only be done when the power is off.

Images