Three-phase line bus and outgoing line fault comprehensive processing device

Abstract

The invention discloses a three-phase line bus and outgoing line fault comprehensive processing device. An outgoing line is provided with a comprehensive switch device, each phase line of a lower port of an incoming line switch of a bus is respectively connected with a thyristor, the other ends of the thyristors are mutually connected in parallel and are connected with a public lead, and when the bus has an interphase short circuit, the thyristors are controlled to be conducted so as to separate the current of an interphase short circuit fault point; and when the interphase short circuit occurs on an outgoing line, the thyristors and the comprehensive switch device cooperate with each other to process an outgoing line fault. The device can comprehensively process bus and outgoing line faults.

Description

technical field [0001] The invention relates to a device, in particular to a comprehensive processing device for three-phase line bus and outgoing line faults. Background technique [0002] In power distribution, the 10kV incoming line is generally introduced into the incoming line screen cabinet and connected to the busbar copper bar in the incoming line screen cabinet. Cabinet lead-out wires. In actual operation, sometimes there will be phase-to-phase short-circuit on the busbar, and phase-to-phase short-circuit or single-phase ground fault may also occur on the outgoing line. For example, due to an accident, the busbar copper bars in the screen cabinet have a phase-to-phase short circuit. At this time, a large current discharge will be generated and accompanied by arc light. The accumulated high heat may explode in the screen cabinet and cause major losses. Although the phase-to-phase short circuit will be detected by the detection device and cause the incoming line swi...

AI Technical Summary

Problems solved by technology

For example, due to an accident, the busbar copper bars in the screen cabinet have a phase-to-phase short circuit. At this time, a large current discharge will be generated and accompanied by arc light. The accumulated high heat may explode in the screen cabinet and cause major losses.

Although the phase-to-phase short circuit will be detected by the detection device and cause the incoming line switch to trip, the mechanical tripping of the incoming line switch takes time, and may still cause an explosion accident during this time

For another example, a phase-to-phase short circuit on the outgoing line will cause a large-scale power outage, and the short-circuit point cannot be located within a short period of time, or a single-phase grounding on the outgoing line will generate a step voltage, which also poses a potential risk of personal injury

At present, there is no set of devices and methods for unified treatment of bus short-circuit faults, outgoing line short-circuits, and ground faults

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