High-voltage power source quick switching high-voltage switch

Abstract

The invention discloses a high-voltage power supply quick switching method. A main vacuum arc extinguish chamber for switching on / off a main power supply, a main tripping mechanism for driving a moving contact in the main vacuum arc extinguish chamber to move, an auxiliary vacuum arc extinguish chamber for switching on / off an auxiliary power supply, an auxiliary tripping mechanism for driving a moving contact in the auxiliary vacuum arc extinguish chamber to move, an interlocking mechanism and a driving mechanism are arranged in a same shell, wherein the driving mechanism synchronously drives the main tripping mechanism and the auxiliary tripping mechanism to trip through the interlocking mechanism. A quick switching high-voltage switch comprises a main power supply binding post, an auxiliary power supply binding post, an outgoing line post, a switching operation mechanism, the main vacuum arc extinguish chamber electrically connected with the main power supply binding post, the main tripping mechanism for driving the moving contact in the main vacuum arc extinguish chamber to move, the auxiliary vacuum arc extinguish chamber electrically connected with the auxiliary power supply binding post and the auxiliary tripping mechanism for driving the moving contact in the auxiliary vacuum arc extinguish chamber to move. By the invention, switching between double power supplies requires short time and approaches to non-time difference switching.

Description

technical field [0001] The invention belongs to the technical field of high-voltage dual power supply switch structure design, and in particular relates to a high-voltage power supply fast switching method and a fast switching high-voltage switch. Background technique [0002] At present, in order to improve the reliability of power supply, a large number of dual power supply lines (two power supply lines, generally one power system line and one self-contained line) are used in the power supply system. When the power supply of one line fails, the other line supplies power. . For this reason, control devices are needed, and no less than two high-voltage switchgears should be used indoors, and no less than two high-voltage switches on poles should be used outdoors, so as to realize the requirements of selecting power supply lines. This control method not only increases the user's equipment and operating costs, but also poses hidden dangers of power supply accidents. For two ...

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Problems solved by technology

[0003] Chinese patent application 200610154471.3 discloses an outdoor high-voltage dual-power vacuum circuit breaker. This type of vacuum circuit breaker is equipped with a high-voltage dual-power conversion device consisting of a chained double-throw isolating switch on the vacuum circuit breaker. Although this method realizes high-voltage The automatic switching of dual power supplies is equipped with electrical interlocking and mechanical interlocking, which reduces the possibility of two high-voltage feeds at the same time. It is an ideal high-voltage dual power switching device at present, but there are still drawbacks. In the external environment, with the increase of the number of times and time of use, the surface of the contact will continue to oxidize, resulting in an increase in the resistance of the contact and a decrease in the conductivity, and the contact is prone to heat and burnout.

In addition, the specific switching operation process of this kind of dual-power vacuum circuit breaker is: first disconnect the dynamic and static conductive contacts in the vacuum interrupter, and then use the double-throw isolating switch to switch between dual power sources, so the switching time is long and generally requires More than 10 seconds, such a long power outage time will cause the electrical appliances to restart before they can run, seriously reducing work efficiency

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