Method for testing movement characteristics of dynamic contact of high-voltage circuit breaker

Abstract

The invention provides a method for testing movement characteristic of a dynamic contact of a high-voltage circuit breaker. The method comprises the steps of arranging auxiliary markers on an insulating pulling rod and a rotating shaft of the dynamic contact of the high-voltage circuit breaker; acquiring image sequences of the auxiliary markers during disconnecting and connecting the circuit breaker through a camera; tracking the auxiliary markers by the particle filtering method; acquiring centroid coordinates of the auxiliary markers of each image; acquiring a movement track of the dynamic contact according to the time intervals of adjacent frames in the image sequences and the coordinate change of the auxiliary markers in the images; then acquiring the movement characteristics according to the movement track of the dynamic contact. According to the method, the particle filter directional, frame correcting and quick capturing method is carried out to obtain the movement track of the auxiliary markers on the insulating pulling rod and the rotating shaft which are in rigid connection with the circuit breaker, so as to gain the movement characteristics of the dynamic contact; the method is convenient to carry out and high in test precision; reliable basis is provided to the state test and performance evaluation of the high-voltage circuit breaker.

Description

technical field [0001] The invention relates to a method capable of accurately testing the motion characteristics of a moving contact of a high-voltage circuit breaker, which belongs to the technical field of testing. Background technique [0002] The moving characteristics of the moving contact of the circuit breaker is one of the important factors to determine the breaking capacity of the circuit breaker. Therefore, both the manufacturer and the operating unit of the circuit breaker need to test the moving characteristics of the moving contact of the circuit breaker. [0003] At present, the test methods for the moving characteristics of the moving contact of the circuit breaker are mainly divided into two categories: one is the millisecond meter speed measurement method, which uses the millisecond meter to measure the time for an object that is consistent with the movement law of the moving contact of the circuit breaker to pass through a constant stroke , and then use th...

AI Technical Summary

Problems solved by technology

Among them, the advantages of the electromagnetic oscillator are simple structure and low cost, but its test error is large, and it cannot be used for the opening-closing-opening cycle test of the circuit breaker operating mechanism; the advantage of the drum-shaped speedometer is that the moving contact stroke and time The relationship curve is clearly visible, and can be used for the opening-closing-opening cycle test of the operating mechanism, but the test error is relatively large, and the cost is relatively high; the disadvantage of the drum-shaped speedometer is that it is relatively heavy and inconvenient to install; the slider-type stroke The recorder records the readings with an oscilloscope. The test method is simple. However, due to the difficulty in solving the problem of contact bouncing, the slider travel recorder can no longer meet the test requirements of the new ultra-high voltage circuit breaker.

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