Intelligent online monitoring device and method for circuit breaker operating mechanism

A technology of operating mechanism and monitoring device, which is applied in the direction of measuring device, electromagnetic measuring device, machine/structural component testing, etc. It can solve the problems of reducing the rapid breaking of faults and large currents of circuit breakers, the inability to be warned in time, and the degradation of static performance. Achieve the effect of eliminating inherent position offset, accurate and effective measurement results, and no mechanical wear
CN106546157AActive Publication Date: 2017-03-29STATE GRID JIANGSU ELECTRIC POWER CO LTD MAINTENANCE BRANCH +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
STATE GRID JIANGSU ELECTRIC POWER CO LTD MAINTENANCE BRANCH
Publication Date
2017-03-29

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Abstract

The invention discloses an intelligent online monitoring device and method for a circuit breaker operating mechanism. The intelligent online monitoring device comprises two displacement sensors, a baffle plate, a supporting plate, a hinge pin, a spring, a pull rod, an LC oscillation circuit, a shaping circuit and a CPU (Central Processing Unit), and is characterized in that the positions of the two displacement sensors correspond to the position of the supporting plate and the position of the end part of the baffle plate at a compression state of the spring, connecting lines at two ends of a detecting coil of each displacement sensor go through an iron core and are led to the LC oscillation circuit, the output of the LC oscillation circuit is connected with the shaping circuit, and the output of the shaping circuit is connected with a high-speed counting interface of the CPU. The frequency of the LC oscillation circuit is calculated through a count value of a high-speed counter within a set timing time, so that inductance of the detecting coil is acquired, thus the distance between each displacement sensor and the baffle plate is calculated, and deformation of the supporting plate and the baffle plate after energy storage of the spring is calculated. The intelligent online monitoring device acquires a static stress value of the operating mechanism by adopting the non-contact displacement sensors, and is free of mechanical abrasion and long in service life.
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Description

technical field

[0001] The invention relates to an intelligent on-line monitoring device and method for an operating mechanism of a circuit breaker, belonging to the technical field of on-line monitoring of circuit breakers. Background technique

[0002] With the development of social productivity and the continuous advancement of science and technology, the demand for electricity has also increased dramatically, and circuit breakers are crucial control and protection equipment in power systems, and are also the most frequently operated equipment in the power grid. Therefore, it is of great significance to ensure the safe and reliable operation of circuit breakers.

[0003] In order to ensure the safe and reliable operation of the circuit breaker, maintenance of the circuit breaker is often arranged. At present, the maintenance methods of circuit breakers can be roughly divided into three types, namely after-event maintenance, planned maintenance and condition maintenance. ...

Claims

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