plasma jet device

Abstract

Disclosed is a plasma injection device. In the plasma injection device, the annular ground electrode is provided with a cavity with an injection hole, and the injection hole is located on the upper surface of the annular ground electrode. As it approaches the direction of the injection hole, the The size of the cavity gradually becomes smaller, and the cavity is provided with a first internal thread in the direction away from the spray hole. The trigger chamber includes a central through hole and a protrusion, the central through hole is provided with a second internal thread, and the protrusion The side surface of the part is provided with a first external thread, and the first external thread is threadedly connected with the first internal thread to assemble the trigger cavity and the annular ground electrode, wherein the protrusion is fitted in the cavity, The trigger electrode includes a frustum at the top and a second external thread on the side surface, the second external thread is threadedly connected to the second internal thread to assemble the trigger electrode and the trigger cavity, wherein the frustum It is lower than the upper surface of the protrusion by a predetermined distance and higher than the bottom surface of the ring-shaped ground electrode.

Description

technical field [0001] The invention relates to the technical field of rapid protection of power systems, in particular to a plasma injection device. Background technique [0002] With the development of fast control and protection of power systems, the requirements for fast action of switchgear are getting higher and higher. Due to the large volume, complex structure and many transmission links of the mechanical operating mechanism, the shortening of the action time is greatly restricted. In some special application fields, it can no longer fully meet the use requirements. Therefore, according to the pulse power theory, relevant researchers have developed gas switches based on different triggering technologies as a new type of fast protection switch system. The action time of the system is short, and the cooperation with traditional mechanical switches can realize the rapid protection of UHV DC transmission lines. [0003] However, the current triggering technologies are ...

AI Technical Summary

Problems solved by technology

[0004] 1. The structure size of laser trigger technology is large, and the laser system is very complicated, which is only feasible in MV-level gas switches

[0005] 2. The electric pulse field distortion trigger technology has requirements for the voltage range of the main gap and the parameters of the trigger pulse waveform. The trigger pulse amplitude usually requires tens to hundreds of kV, the leading edge of the pulse is tens of ns, and the working coefficient of the main gap (main The ratio of the working voltage of the gap to the DC self-breakdown voltage) usually cannot be less than 0.6, otherwise the trigger discharge delay will increase sharply. When the working coefficient is less than 0.5, the electric pulse field distortion trigger mode is almost no longer capable of triggering the main gap conduction The ability cannot meet the technical requirements that the fast switch can be effectively triggered even if the working voltage is lower than 40%.

Images