Device and method for measuring switch-on or switch-off speed of high-voltage circuit breaker

Abstract

The invention discloses a device and method for measuring the opening and closing speed of a high-voltage circuit breaker. The device includes a sensor installation frame, a displacement sensor and an intelligent speed measuring controller; the method collects the output voltage of the displacement sensor in real time while the high-voltage circuit breaker is in motion. After the signal is calibrated and calculated, the displacement-time curve of the moving contact is output at a certain ratio. The present invention corrects and outputs the nonlinear characteristics of the displacement sensor in real time through nonlinear interpolation and table look-up methods, so that the output displacement-time curve is closer to the actual motion curve of the moving contact; it can automatically complete the opening and closing of the high-voltage circuit breaker The calculation and output of the displacement curve has high measurement accuracy and can adapt to the needs of different occasions.

Description

technical field [0001] The invention belongs to the field of state monitoring of electric equipment, in particular to a device and method for measuring the opening and closing speed of a high-voltage circuit breaker. Background technique [0002] In the power system, the high-voltage circuit breaker is a widely used electrical equipment. Its opening and closing speed has a direct impact on its breaking capacity. Only by ensuring an appropriate opening and closing speed can its breaking current be fully utilized. ability. Therefore, it is of great significance to accurately measure, calculate and analyze the opening and closing speed of high-voltage circuit breakers. Generally speaking, the speed measuring device indirectly obtains the displacement characteristic curve of the moving contact by converting the mechanical movement of the moving contact of the circuit breaker into directly measurable signals such as electrical signals, optical signals, and magnetic signals. [...

AI Technical Summary

Problems solved by technology

This device is intuitive and easy to understand, but the operation is complicated, and it is necessary to write a recognition processing program involving machine vision, and the equipment cost is relatively expensive

[0008] The above types of circuit breaker speed test devices generally have the disadvantages of difficult installation of the sensor, loose sensor fixation, or jamming of the circuit breaker movement. Therefore, it will have a certain adverse effect on the measurement of the speed characteristics of the circuit breaker.

In addition, due to manufacturing errors and the material characteristics of the sensor itself, there is always a certain nonlinearity in the output characteristics of the sensor, which directly affects the detection accuracy.

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