Closed discharge gap triggered by plasma jet and application thereof

A plasma and discharge gap technology, which is applied in the direction of plasma, spark gap overvoltage arresters, circuits, etc., can solve the problems of too small gap current, arc extinguishing, etc., achieve small leakage current, prevent gap current interruption, increase Effect of large working range and lifetime
CN110430655APending Publication Date: 2019-11-08西安西交瑞力电气研究院有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
西安西交瑞力电气研究院有限公司
Publication Date
2019-11-08

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Abstract

The invention discloses a closed discharge gap triggered by a plasma jet and an application thereof. The closed discharge gap comprises a plasma spraying unit comprising an injection device and a plasma trigger T, wherein the injection device is arranged in a contact unit, generates plasmas and ablate the ablation materials through pulse voltages and currents and generates a plasma jet by adoptinga capillary action of an elongated cavity, the injection device is connected with a plasma trigger T through the high voltage wire LA, the contact unit is arranged in the cavity unit for tolerance ofarc ablation, the cavity unit is used for providing a closed high-pressure gaseous medium environment. The closed discharge gap can ensure the reliable operation in the low work parameters, improvesthe control performances of the discharge gap, increases the work range and service life of the discharge gap, solves the problems that the arc is extinguished due to the small gap current, avoids thegap breaking, and replaces the complex and high-cost energy storage and freewheeling device.
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Description

technical field

[0001] The invention belongs to the technical field of controllable lightning arresters, and in particular relates to a closed discharge gap triggered by plasma jets and its application. Background technique

[0002] Surge arresters are often used in overvoltage protection of DC power transmission and transformation equipment to limit lightning overvoltage and operating overvoltage. For surge arresters, charging rate and residual voltage are two important technical parameters, but there is an inherent contradiction between them. The lower the charge rate of the arrester means that the current flowing through the arrester is smaller when it is working normally, and the corresponding arrester has low energy consumption, low heat generation, and slow aging speed; in order to achieve a low charge rate, it is necessary to connect more The arrester valve plate. The low residual voltage of the arrester means that when the surge current arrives, the overvoltage at ...

Claims

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