Super-quick vacuum switch device

Abstract

The invention relates to the field of high-voltage switches of power systems, in particular to a super-quick vacuum switch device. The super-quick vacuum switch device comprises two to four super-quick vacuum switch modules which are connected in series; a first operating mechanism and a second operating mechanism of each super-quick vacuum switch module are respectively positioned below a first epoxy embedded vacuum pole and a second epoxy embedded vacuum pole; a first voltage equalizing device and a second voltage equalizing device are respectively connected in parallel with the first epoxy embedded vacuum pole and the second epoxy embedded vacuum pole; a pulse current generator is connected with each of the first operating mechanism and a second operating mechanism; an isolation auxiliary power supply outputs a first direct-current voltage to provide power for a quick switch controller, and outputs a second direct-current voltage to provide charging voltage for the pulse current generator; the quick switch controller is connected with the pulse current generator; the quick switch controller is communicated with a direct-current circuit breaker control device positioned at ground potential through an optical fiber. The switch device is light in moving mass, quick in response and simple in structure, and facilitates module cascade extension.

Description

technical field [0001] The invention relates to the field of high-voltage switches in electric power systems, in particular to an ultra-fast vacuum switch device. Background technique [0002] With the global energy shortage and environmental pollution becoming more and more serious, the utilization and development of renewable energy has been paid attention to by countries all over the world, especially the proportion of wind power in future energy supply will gradually increase. However, due to the intermittence and uncertainty of wind power output and the absorptive capacity of the power system, the effective utilization rate of wind power is not high. The multi-terminal direct current transmission system and direct current grid technology based on conventional direct current and flexible direct current are one of the effective technical solutions to solve the problem of grid connection and accommodation of new energy. [0003] However, due to the small impedance of the ...

AI Technical Summary

Problems solved by technology

In the prior art, the mechanical switches used for high-voltage DC circuit breakers mainly have the following problems: (1) Spring operating mechanisms, hydraulic operating mechanisms or permanent magnetic operating mechanisms are used, and the operating time of these traditional operating mechanisms is usually within several Ten ms, the response speed is slow; (2) The operating mechanism is placed at the ground potential, and the operating mechanism drives the contact of the arc extinguishing chamber to move through the insulating rod, and the mass of the moving part of the system is large; (3) Using single or double fractures, in order to meet After the fault is removed, the insulation withstand ability, the contact opening distance of the arc extinguishing chamber is tens of mm, and the contact movement time of the arc extinguishing chamber is long

Therefore, it is difficult for the mechanical switches of the prior art to meet the requirements of fast HVDC circuit breakers

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