Method for calculating position and movement velocity of vacuum switch contact

Abstract

The invention discloses a method for calculating the position and the movement velocity of a vacuum switch contact. The method comprises the following steps of an image acquisition step of acquiring a continuous image of the movement of the vacuum switch contact and an arc; an edge analysis step of analyzing each frame in the continuous image, acquiring the upper edge position and the lower edge position, of the arc in each frame, which are respectively the position of a vacuum switch static contact and the position of a moving contact in the present frame; and a velocity calculating step of calculating the displacement of the moving contact in two adjacent arc motion frames, and calculating the ratio, of the displacement to the frame difference time, which is the movement velocity of the moving contact. Due to the fact that an image analysis technology is employed, when the method provided by the invention is compared with a present method for calculating the position and the movement velocity of a vacuum contact, the precision is greatly improved; and at the same time the employed technology is mature and reliable, and the method is suitable for large-scale popularization and usage.

Description

technical field [0001] The invention relates to a method for calculating the position and motion speed of a vacuum switch contact, in particular to a method for calculating the vacuum switch contact and motion based on image analysis. Background technique [0002] The vacuum switch is the most important control and protection device in the power grid. The opening and closing speed is an important mechanical performance parameter of the vacuum switch. At present, the grating speed measurement method is widely used. By installing the grating speed measurement system on the operating mechanism, the measured The connected actuator speed thus indirectly measures the speed of the moving contact. Due to the coordination error in the connection between the various parts of the operating mechanism, there will inevitably be an error between the measured result and the actual speed, and it is difficult to meet the accurate measurement of the opening and closing speed of the circuit bre...

AI Technical Summary

Problems solved by technology

Due to the coordination error in the connection between the various parts of the operating mechanism, there will inevitably be an error between the measured result and the actual speed, and it is difficult to meet the accurate measurement of the opening and closing speed of the circuit breaker

In addition, the vacuum switch is a high-voltage electrical appliance, and the electromagnetic field around it is strong, so the sensors installed near it will be subject to strong electromagnetic interference, which will also affect the detection accuracy.

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