Full-control intelligent high-power arc-free DC bus contact device

Abstract

The invention provides a full-control intelligent high-power non-arc direct current bus contact device (DCS). The full-control intelligent high-power non-arc direct current bus contact device (DCS) is characterized by being composed of a controller A, a mechanical switch (contact switch) K channel, an electronic power switch (contactless switch) T1 channel and an anti-jamming circuit. By utilizing the advantage that a circuit is switched on and off by the contactless switch without an arc, when on-load switching on is performed, it is guaranteed that the contactless switch T1 channel is firstly switched on and then the mechanical switch K channel is switched on, when on-load switching off is performed, it is guaranteed that the mechanical switch K channel is firstly switched off and then the contactless switch T1 channel is switched off, and therefore the arc risk of the direct current circuit on-load switching on and off can be evaded. The anti-jamming circuit is composed of an electronic power switch (contactless control switch) T2, a capacitor C and a voltage source E and is used for preventing the T1 from mistakenly being triggered in an off state due to interference.

Description

technical field [0001] This patent relates to the field of high-power DC switches, especially the field of medium-voltage (U>500V) and high-voltage (U>1000V) high-power DC switches. DC load cut-off technology of contact switch. Background technique [0002] As we all know: the arcs formed by all kinds of DC mechanical switches (contact switches) at the moment before the load is turned on and the moment just after the load is disconnected are the electric fields formed by the voltage at both ends of the contacts to break down the air (ionization) As a result, if there is no voltage across the contacts at the moment before turning on and after turning off, no arc will occur. In the various types of DC power supply systems that have emerged in recent years, there are more and more loads (such as subways, trams and trolleybuses, electric trains, inverters for emergency power supplies, etc.) that do not allow interruption of DC power supply during operation. Under normal ...

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is to provide a full-control intelligent high-power arc-free DC bus bar contact device for the arc extinguishing problem of on-load switching of high-power DC circuits, and to solve the problem of full-control non-contact switch vulnerable The problem of interference provides an anti-interference circuit, and also through the control of the controller to ensure that the non-contact switch channel only carries the load current when the emergency DC power supply is put in or out, and does not carry the current independently at other times. Its basic structure is: by mechanical Switch (contact switch) K and power electronic main switch (non-contact main switch) T1 form a dual-channel structure of DC emergency power output, which is connected between DC emergency power supply E02 and DC output bus M+

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