Vibration detection device for GIS under simulated operation condition

Abstract

The invention discloses a vibration detection device for a GIS under simulated operation condition. Two ends of a GIS guide rod in a shell are connected through a connecting rod, and the GIS guide rodis fixed to the shell through an insulator; a vibration sensor connected with an oscilloscope is attached to the outside of the shell; a transformer provides voltage for the GIS guide rod; and a current booster provides current for the GIS guide rod. A voltage signal is provided through a gas insulation test transformer, the current booster provides a current signal, and the two signals are applied at the same time to simulate the actual operation condition of a GIS; through connection of the connecting rod with adjustable thickness and length with the GIS guide rod in series, parts in the actual GIS such as a disconnecting switch and a circuit breaker contact where a conductor size suddenly changes are simulated; and through the voltage and current signals applied at the same time, current constriction occurs in a discontinuous section of the guide rod, and then a vibration signal is generated, a vibration sensor is utilized to measure the vibration signal, and thus the vibration detection device can be used for research of a vibration characteristic of the GIS under an actual operation condition.

Description

technical field [0001] The invention relates to a vibration detection device, in particular to a vibration detection device for a GIS under simulated operating conditions. Background technique [0002] Gas Insulated Switchgear (GIS) is more and more widely used in the power grid due to its small footprint and low maintenance workload. For GIS, more attention is paid to its insulation state at present, and a lot of research has been carried out on the detection of its insulation state by partial discharge. [0003] But as a complex mechanical body, GIS's mechanical state is also an important aspect related to its safe operation. There are devices with contacts such as isolating switches and circuit breakers inside the GIS. Due to the change in the size of the connecting rod at the connection of the contacts, the current shrinks here, which will generate vibration at the contacts, and the vibration is transmitted to the GIS through insulators and other components. a housing,...

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Problems solved by technology

[0004] However, in order to be simple and convenient in the current research, a single current signal is applied instead of a voltage signal. In the actual operation of GIS, the voltage and current signals act at the same time. Therefore, a research that can apply voltage and current signals simultaneously Experimental equipment is very necessary

[0005] In addition, in the current research, the actual disconnector contacts are mostly used. Since the contact state of the actual contacts is difficult to control, detailed research cannot be carried out. Therefore, a test component that can characterize the current contraction caused by the discontinuity of the guide rod is studied. , more targeted research can be carried out

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