Integrated electrode structure applicable to mechanical type direct current circuit breaker, and driving method of integrated electrode structure

Abstract

The invention discloses an integrated electrode structure applicable to mechanical type direct current circuit breaker, and a driving method of the integrated electrode structure. The integrated electrode structure comprises a moving conductive rod; a main moving electrode is arranged at one end of the moving conductive rod; an auxiliary moving electrode is arranged on the moving conductive rod; the main moving electrode is correspondingly provided with a main static electrode; the main static electrode is connected to one end of a static conductive rod; the auxiliary moving electrode is correspondingly provided with au auxiliary static electrode; the auxiliary static electrode is connected with an auxiliary static electrode lead end, wherein the moving conductive rod drives the main moving electrode and the auxiliary moving electrode to perform linear motion. By virtue of the electrode structure, the main electrode and the auxiliary moving electrode can be driven synchronously by onemoving conductive rod, so that quick on and off of the auxiliary electrode can be realized when the main electrode is switched on or off; and the auxiliary electrode can be adjusted to be kept in theswitch-on state by changing the dimension of the auxiliary electrode or the movement speed of the moving conductive rod.

Description

technical field [0001] The invention belongs to the technical field of power switches; in particular, it relates to an integrated electrode structure suitable for a mechanical DC circuit breaker; and also relates to a driving method for the integrated electrode structure. Background technique [0002] With the development of DC grid technology, the production, transmission, distribution and consumption of electric energy are gradually moving towards the direction of high efficiency and environmental protection. Compared with the traditional AC grid, the DC grid mainly has the advantages of large transmission power, low loss, and high stability. However, since the direct current does not have a natural zero-crossing point, the current technology for breaking the direct current is immature, which has become a major bottleneck for the further development of the direct current grid. [0003] At present, there are mainly three types of design schemes for DC circuit breakers: mec...

AI Technical Summary

Problems solved by technology

Among them, the air ball gap switch has certain safety hazards due to the air arc generated when it is turned on, so it is not suitable for many occasions; the vacuum arc in the vacuum ball gap switch is easy to extinguish when the oscillating current crosses zero, resulting in LC oscillation The circuit stops working, so the current freewheeling performance of the switch is relatively poor; the controllable power semiconductor device is only suitable for low voltage and low current occasions due to its low withstand voltage and small conduction current.

Traditional mechanical switches have disadvantages such as large dispersion, slow opening and closing speed, and insufficient mechanical strength, which limit the performance of the entire DC circuit breaker

At the same time, the above three switches all have the disadvantages of many auxiliary components, high cost, large volume, poor compatibility, and low reliability.

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