Vibration testing device and method for primary part of electronic current transformer

Abstract

The invention provides a vibration testing device and method for a primary part of an electronic current transformer, and the device and method can directly measure the vibration waveform and intensity of the primary part, and achieve a purpose of carrying out two opposite tests through one testing platform. The device can directly collect a true vibration signal through a set vibration sensor, and carries out direct, complete and precise testing of the vibration of the primary part of the electronic current transformer in an intelligent isolation circuit breaker through conversion. Through the collection of the vibration signal, the device achieves the testing, and does not need to give consideration to and depend on the power-on and power-off conditions of the circuit breaker and the electronic current transformer. Therefore, the device can meet the requirements of testing primary vibration of the electronic current transformer at a short-time current and the vibration when the primary part is mechanically coupled to the circuit breaker under the two opposite conditions through a direct method.

Description

technical field [0001] The invention relates to an electronic current transformer performance testing technology in the technical field of electric power system automation, in particular to a vibration test device and method for a primary component of an electronic current transformer. Background technique [0002] Electronic current transformers are key equipment for current measurement in power systems. In practical applications, the primary components of electronic current transformers are usually directly integrated in intelligent isolation circuit breakers. Since such devices will generate large vibrations when they are opened and closed, in order to verify whether the current transformers can withstand this vibration Normal operation, whether the output range meets the requirements of the standard or the national grid test plan, it is necessary to test the influence of external vibration on the output of the current transformer when the primary parts of the current tra...

AI Technical Summary

Problems solved by technology

[0007] A vibration test during a short-time current period requires the electronic current transformer to be tested under the condition that the intelligent isolation circuit breaker is rigidly connected to the circuit, the primary input current is 30kA-60kA, and the switch is opened after the test lasts for 3 seconds; The vibration test when the circuit breaker is mechanically coupled requires the circuit breaker to be connected through a flexible conductor and to perform reclosing operation under the condition of no current, so it is difficult to test the real opening moment of the circuit breaker under the condition of no current, so the It is difficult to perform two very different experiments in one set and use the same test method

At the same time, the current detection equipment for the vibration test when the primary component of the electronic current transformer is mechanically coupled with the circuit breaker and the primary vibration test during the short-term current period are all qualitative tests for the impact of vibration on its output, and cannot be quantitatively measured The vibration waveform and intensity applied to the primary parts of the electronic current transformer are not conducive to in-depth research on the anti-vibration performance of the electronic current transformer

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