Method for monitoring service life of bipolar continuous capillary ejector

Abstract

The invention discloses a method for monitoring the service life of a bipolar continuous capillary injector, wherein the method for monitoring the service life of the bipolar continuous capillary injector comprises the steps: determining the working parameters of a to-be-monitored bipolar continuous capillary injector, carrying out service life experiment under the same conditions, and obtaining the residual voltage Ur of a trigger capacitor of the bipolar continuous capillary ejector during each operation in the whole service life period; obtaining a scatter diagram of the residual voltage Ur of the trigger capacitor changing along with the life, and determining an alarm threshold Urm of the voltage Ur of the trigger capacitor; deriving a relational expression between the life and the residual voltage of the trigger capacitor based on the scatter diagram; and monitoring the service life of the actually-operated bipolar continuous capillary ejector based on real-time monitoring data of the actually-operated bipolar continuous capillary and the relational expression, and judging the working state of equipment based on the alarm threshold Urm.

Description

technical field [0001] The invention relates to the technical field of fast bypass switches in power systems, in particular to a method for monitoring the life of a bipolar continuous capillary injector. Background technique [0002] The gas switch triggered by plasma jet has a series of advantages such as low work coefficient, fast conduction speed, and simple control, and has been widely used in pulse power systems and power systems. For example, the fast control switch of the controllable arrester in Jiangsu-Baihetan requires it to be turned on within 1ms after triggering, so as to realize the action of the controllable arrester and limit the system overvoltage. Therefore, extremely high requirements are placed on the reliability of the switch. [0003] The common injection trigger technology is triggered by spark discharge injection trigger and bipolar continuous trigger technology. Among them, the bipolar continuous capillary injector divides the long capillary into tw...

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Problems solved by technology

[0004] However, with the increase in the number of operations of the bipolar continuous capillary injector, the performance of the capillary injector is degraded due to the ablation of the arc, the diameter of the capillary tube becomes larger, and the cavity is carbonized, and finally reaches the end of its life. The trigger conduction failure of the switch has brought great hidden dangers to the reliability of the equipment. There is an urgent need for a detection method to realize the life monitoring and evaluation of the life state of the bipolar continuous capillary injector, and send out early warning signals in time for maintenance. Replace the capillary injector to avoid affecting the stable and reliable operation of the switching system due to the life aging of the capillary injector

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