Device and method for online monitoring comprehensive characteristics of high-voltage circuit breaker

Abstract

The invention discloses a device and method for online monitoring the comprehensive characteristics of a high-voltage circuit breaker. A tulip contact is installed on a conductive rod. A temperature sensor is installed on the tulip contact. The output end of the temperature sensor is connected with a high-voltage side circuit processing unit. A current induction coil is arranged on the periphery of the conductive rod in a sleeving mode. The output end of the current induction coil is connected with the high-voltage side circuit processing unit. The high-voltage side circuit processing unit is connected with a photoelectric sensor through an optical fiber. The output end of the photoelectric sensor is connected with a first front end signal amplifier. A spring fixing base is installed on an insulating pull rod. One end of a spring body is installed on the spring fixing base, and the other end of the spring body is installed on a force sensor. The force sensor is installed on a base. The output of the force sensor is connected with a second front end signal amplifier. The output end of the first front end signal amplifier and the output end of the second front end signal amplifier are both connected with a low-voltage side circuit processing unit. The output end of the low-voltage side circuit processing unit is connected with a main control unit. By means of the device, the problem of how to online monitor the comprehensive characteristics when the circuit breaker actually runs can be solved.

Description

technical field [0001] The invention belongs to the technical field of on-line measurement of comprehensive characteristics of high-voltage circuit breakers, and in particular relates to an on-line comprehensive characteristic monitoring device and a monitoring method applied to 10KV vacuum solid-sealed pole circuit breakers. Background technique [0002] As one of the most important equipment in the power system, the reliability of the high-voltage circuit breaker directly affects the safety and stability of the power grid operation. In the past, off-line routine inspections were mostly used to carry out regular planned maintenance on circuit breakers. This kind of planned preventive maintenance is blind, expensive, and affects power production. With the continuous improvement of the voltage level and grid capacity of the power system, people have proposed a method to determine whether to maintain or not according to the actual working state of the circuit breaker, which is...

AI Technical Summary

Problems solved by technology

The Chinese Patent Application No. 201310168584.9 "Detection Method for Mechanical Characteristics of Circuit Breakers" proposes a mechanical structure for online detection of mechanical characteristics of circuit breakers. Although it can solve the detection of online mechanical displacement of circuit breakers, it does not provide a method for how to install the sensor , does not actually solve the problem of difficult sensor installation

The Chinese patent application number is 201220744752.5 "on-line detection system for mechanical characteristics of vacuum circuit breakers", which proposes a signal processing method for on-line monitoring of mechanical characteristics of vacuum circuit breakers. Major Issues in Measuring Contact Displacement in Tight Spaces

The Chinese Patent Application No. 201020687812.5 "Mechanical Characteristics Detection Device for Vacuum Circuit Breakers" proposes a method for detecting the on-line displacement of contacts by installing the sensor on the connecting sleeve. The problem with this method is that the sensor is not installed to directly reflect the displacement of the contacts. It is installed on the connecting sleeve instead of the insulating rod, so there is a transmission measurement error, and it does not completely solve the problem of the installation space of the sensor

Therefore, the actual situation is that the difficulty of how to effectively measure the displacement parameters of the mechanical characteristics of the circuit breaker contacts under operating conditions has not yet been solved

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