An intelligent toggle switch

Abstract

The invention discloses an intelligent switching switch. The intelligent switching switch is composed of a plurality of paths of subswitches, a current transformer, a switching switch control circuit and a communication bus. The subswitches are each correspondingly connected with a line, and the subswitches are sequentially connected with the current transformer and the control circuit after being connected in parallel. The subswitches are identical in structure, and each comprise a contactor, an auxiliary relay and a diode, and negative electrodes of the diodes are connected with the auxiliary relays in series and then connected with the contactors in parallel. The diodes are adopted as electronic power switches of the intelligent switching switch, switching time is short, the requirement for a sensitive load can be met, the advantages of being extremely low in loss, free of an additional heating circuit and small in size, saving cost and the like are achieved, arc-free switching is achieved, and the service life of the contactors and the auxiliary relays can be greatly prolonged.

Description

Technical field [0001] The present invention relates to the technical field of power transmission and distribution, in particular to an intelligent switch. Background technique [0002] In the traditional power grid, when a certain power supply line fails, in order to ensure the continuous power supply of users, the common method is to use mechanical switches (vacuum circuit breakers, SF6 circuit breakers, etc.) to switch users from the faulty line to the fault-free bus. . The inherent characteristics of mechanical switches make the switching speed and transient characteristics not very ideal, and it is impossible to achieve "seamless" switching. For sensitive loads, it is generally required that the power supply must be switched within 5-20ms, and the requirements are even higher. Mechanical switches are far from being able to do this. In addition, when the mechanical switch is closed or opened, it will cause trigger corrosion, electromagnetic interference and power loss due t...

AI Technical Summary

Problems solved by technology

The main disadvantage of this type of composite switch technology solution is that due to the use of thyristors, the cost of equipment is high, and the introduction of thyristor drive circuits requires precise zero-crossing triggering, otherwise arcing still exists, which reduces the overall reliability of the equipment

According to the existing project operation experience, the contacts of the contactor will still burn out

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