DC high current ice fusion device with static dynamic no-power compensation function

Abstract

The invention relates to a direct current heavy current thawing device with the function of a static type dynamic reactive power compensation, which belongs to the corollary equipment technical field of a high-low voltage power supply and distribution system; the invention is characterized in that a three-phase alternating current wave filter is connected to a generatrix in parallel; an intermediate point of a three-phase high voltage heavy current controlled silicon valve is connected with the generatrix through a three-phase alternating current reactor; the negative electrodes of the controlled silicon valve are selectively connected with the generatrix through the three-phase alternating current reactor; the positive electrode and the negative electrode of the same phase and the same electrodes of the different phases of the three-phase high voltage heavy current controlled silicon valve are respectively in selective connection; a trigger signal emitted by a controller triggers the conduction of the three-phase high voltage heavy current controlled silicon valve through optical fibers. The direct current heavy current thawing device combines direct current heavy current thawing technology and static type dynamic reactive power compensation technology, realizes corresponding functions according to different requirements on the spot for electricity consumption, can obviously reduce the corollary equipment cost of the power supply and distribution system, effectively improves the utilization rate of the equipment, can be used as a direct current heavy current thawing device with controllable current when line freezes and can be also used as a static type dynamic reactive power distribution device.

Description

Technical field [0001] The invention belongs to the technical field of auxiliary equipment for high and low voltage power supply and distribution systems, and specifically relates to a direct current large current ice melting device with a static dynamic reactive power compensation function. Background technique [0002] At present, high-voltage transmission lines are disconnected, towers, and poles are frequently broken due to icing and snow on transmission lines. High-voltage transmission line breaks and towers have severely affected the safe operation of the power grid and caused large-scale blackouts. accident. In order to prevent such accidents, the ice and snow on the wires must be melted off in time. At present, two major types of ice melting methods, namely mechanical (vibration) and electric heating, are adopted. Mechanical (vibration) ice melting, that is, the method of vibrating wire is used to make the ice and snow fall off. Its point is simple ...

AI Technical Summary

Problems solved by technology

[0004] If the DC large current melting function and the static dynamic reactive power compensation function can be integrated into the same device, the utilization rate of the equipment will be effectively improved, but there is no similar device at present

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