Device suitable for triggered gap

Abstract

The invention provides a device suitable for a triggered gap. The device comprises a triggered gap body (101), a trigger (102) and a control unit (103). The triggered gap body (101) comprises a high voltage electrode (1) and a ground electrode (2). The ground electrode is provided with a crater-type ground electrode truncated cone structure; the high voltage electrode is provided with a smoothly-transited boss structure; each electrode is provided with edge-overlapped radial arm structures; each electrode is provided with a stainless steel backboard; the crater-type ground electrode truncated cone structure can prevent injection cavity punctures from being ablated, and the trigger performance of the gap is guaranteed; the smooth high voltage electrode boss structure can mitigate ablation of the electric arc to the high voltage electrode central truncated cone, and the electrode flow capacity can be improved; the edge-overlapped radial arm structures can mitigate ablation to edges of the electrodes, and the electrode flow capacity and the whole mechanical strength are improved; and each of the high voltage electrode and the ground electrode is provided with one stainless steel backboard, and the mechanical strength of the electrodes can be further improved.

Description

technical field [0001] The invention relates to a device for triggering gaps, in particular to a large-capacity SF under medium and high pressure levels. 6 Device that triggers the gap. Background technique [0002] In the field of pulse power, with the development of high-power trigger gap technology, the trigger conduction time can be shortened to tens of nanoseconds, the flow capacity can reach thousands of coulombs, and it has a high withstand voltage level. The action time of the trigger gap is much lower than that of conventional switches. It has strong controllability, high technical performance, and is easy to form a fast closing switch. It can be used as a core device to form a special application and solve many long-standing technical problems in the power grid. High power trigger gap is divided into vacuum and SF 6 There are two types of trigger gaps, of which SF 6 Higher voltage levels are available for trigger gaps. [0003] SF 6 The trigger gap mainly reli...

AI Technical Summary

Problems solved by technology

The structure of the electrode and its flow-induced magnetic field are the key factors affecting the arc motion characteristics. In SF 6 During the development of the trigger gap, the spiral groove contact structure of the vacuum circuit breaker is often applied directly, which may easily lead to insufficient pressure in the injection chamber, insufficient plasma jet injection height, difficult conduction of the main gap, and long stagnation time of the arc after arcing, which will lead to electrode failure. The central platform is seriously ablated. When the arc moves to the edge of the electrode, it will stagnate again, and there will be obvious melting marks on the edge of the electrode. The above phenomenon will undoubtedly affect the SF 6 Improvement of trigger gap electrical performance

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