Topological structure for operation of short circuit impact generator

Abstract

The invention discloses a topological structure for operation of a short circuit impact generator. The topological structure comprises the short circuit impact generator, a current uniformizing and limiting device, a first switch, a second switch, a load electrical appliance and connection busbars, wherein the short circuit impact generator, the current uniformizing and limiting device, the first switch, the second switch and the load electrical appliance are sequentially connected through the connection busbars to form a loop, or the short circuit impact generator, the first switch, the current uniformizing and limiting device, the second switch and the load electrical appliance are sequentially connected through the connection busbars to form a loop. Two or three parallel vacuum arc extinguish chambers are connected with the current uniformizing and limiting device which has functions of current uniformizing and limiting, on and off current of each vacuum arc extinguish chamber is lowered, and an original high-capacity sulfur hexafluoride circuit breaker which is high in manufacturing cost, large in size and different in frequent on and off is replaced by two or three parallel vacuum arc extinguish chambers which are lower in manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of short-circuit impulse generators, in particular to a topological structure for the operation of short-circuit impulse generators. Background technique [0002] At present, with the strengthening of power system networking, the short-circuit current level of the system has increased sharply, and the ability of switching devices to break short-circuit current has been continuously strengthened. In order to meet the requirements of the type test of switching appliances, the high-voltage electrical appliance testing center needs to continuously enhance the test capability and increase the capacity of the short-circuit impact generator. Therefore, in the operation process of the short-circuit impulse generator, a scientific and reasonable topology structure is required. This topology structure can not only cooperate with the normal operation of the impulse generator without affecting the output power of the ge...

AI Technical Summary

Problems solved by technology

At present, sulfur hexafluoride circuit breakers are mostly used in the operation of short-circuit impact generators, but large-capacity sulfur hexafluoride circuit breakers are too bulky to meet the requirements for breaking short-circuit currents, and are not suitable for frequent breaking of short-circuit currents. Procurement, installation and post-maintenance costs are too high

A single vacuum interrupter cannot break a short-circuit current above 100kA. Therefore, ordinary vacuum circuit breakers cannot protect large-capacity short-circuit impact generators.

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