Circuit breaker vibration monitoring system and monitoring method based on acceleration sensor

Abstract

The invention relates to a system and a method for monitoring vibration of a circuit breaker, and in particular relates to an acceleration sensor-based system and an acceleration sensor-based method for monitoring vibration of a circuit breaker. The system comprises a resonance type wireless passive voice surface wave acceleration sensor, a reader, a semiconductor temperature sensor, a switching value state sensor and a host computer, wherein the acceleration sensor is arranged nearby a vibration source of a key part of the circuit breaker; the reader is arranged at a position not more than 2m away from the acceleration sensor; the semiconductor temperature sensor is arranged on the surface of the reader; the switching value state sensor is arranged on the circuit breaker; the reader is in communication with the host computer through a serial port and an Ethernet interface. The system disclosed by the invention adopts the wireless passive voice surface wave acceleration sensor to measure vibration signals of the circuit breaker, the monitored data are transmitted in a wireless mode, and the semiconductor temperature sensor is used for realizing temperature compensation of the acceleration sensor; the acceleration sensor has the advantages of being purely passive, free from maintenance, convenient to install and high in safety.

Description

technical field [0001] The invention relates to a circuit breaker vibration monitoring system and a monitoring method thereof, in particular to a circuit breaker vibration monitoring system based on an acceleration sensor and a monitoring method thereof. Background technique [0002] As the most important equipment in the power generation, transmission and distribution links of the power system, the high-voltage circuit breaker's operation reliability plays a vital role in ensuring the safe and stable operation of the power system. According to the research results of CIGRE and China Electric Power Research Institute, mechanical failure accounts for nearly 37% of switchgear failures, so it is extremely necessary to monitor the mechanical failure of switchgear. Among the various signals obtained from the online monitoring of the mechanical state of the circuit breaker, the vibration signal reflects the largest amount of information on the equipment operating status. In recent...

AI Technical Summary

Problems solved by technology

The piezoresistive acceleration sensor has the advantages of good frequency response characteristics, easy measurement method, and good linearity, but its disadvantages are serious temperature effects and low sensitivity

The piezoelectric acceleration sensor has a simple structure, firmness, small size, light weight, wide acceleration measurement range, and strong anti-interference ability of external magnetic field, but it is only suitable for measuring high-frequency changes, and has higher requirements for subsequent signal conditioning circuits. high

The above two acceleration sensors are connected to the subsequent processing circuit by wire. In the field application (especially when the switchgear operates), the signal transmission line will be subject to external electromagnetic interference, which will affect the measurement accuracy.

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