High voltage high power resonant vibration frequency conversion deicing method and its deicing device

Abstract

The invention relates to a high voltage large power resonance frequency conversion deicing device and method which is capable of improving the frequency of a line loading circuit from an industrial frequency of 50Hz to 1000-1800Hz according to the principle that a lead wire generates skin effects under a high frequency situation, and the resistance of the corresponding line is increased by about 5 times, the current transmitted by the line under the condition of a same deicing power is reduced, so as to reduce the overcurrent hardness of the line; the principle of LC series resonance is simultaneously utilized by connecting a resonance capacitor reaction at the connection position of a power electric frequency conversion device and the line to lead the equivalent inductance of the power electric frequency conversion device and the line, thus realizing series resonance under the current of 1000 to 1800Hz. In order to realize series resonance between the equivalent inductance of a line under the situation with incorrect line data and the series capacitor, a self adaptive frequency adjusting technique is adopted in the invention to lead the line to be operated at a resonance point. The device of the invention is suitable for deicing three-phase and single-phase lines; a constant current control method can ensure the stability of deicing; an advanced phase-split control method can ensure the device to be suitable for the simultaneous deicing of the three-phase line with different parameters.

Description

technical field [0001] The invention relates to the application of a deicing method based on the principle of high-voltage resonant frequency conversion and the research on a deicing power supply device. It belongs to the technical field of electric deicing. Background technique [0002] Sustained rain, snow and freezing disasters often put the power system in trouble, with towers collapsing, lines out of service, and power grids disconnected. These power crises pose a huge threat to the normal life and economic operation of the people. The most important cause of these dangers is the icing of the line, so when the icing of the line reaches a certain thickness, some deicing measures must be taken. Among the existing deicing techniques, mechanical and manual deicing methods have low efficiency, high risk coefficient, and long cycle time, making it difficult to promote them on a large scale; the method of using new material wires increases the cost and often cannot be promote...

AI Technical Summary

Problems solved by technology

Among the existing deicing techniques, mechanical and manual deicing methods have low efficiency, high risk coefficient, long cycle, and are difficult to promote in a large area; the method of using new material wires increases the cost and often cannot be well promoted. Especially in the old lines; the original line high-current ice-melting method requires the integrity of the line and consumes a lot of power; the DC current ice-melting method often melts ice on two lines at the same time. It takes a relatively long time to melt ice and the operation is complicated

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