Vacuum circuit breakers are commonly used high-voltage switchgear in power systems to open or close circuits. In order to ensure the normal operation and safety of the vacuum circuit breaker, it is necessary to monitor its mechanical characteristics online. This paper will introduce the importance of mechanical characteristics of vacuum circuit breaker, and discuss the on-line monitoring method and its application to improve the reliability and operation efficiency of vacuum circuit breaker.

1. The importance of mechanical characteristics of vacuum circuit breakers

as an important equipment in power system, the mechanical characteristics of vacuum circuit breaker directly affect its normal operation and safety. Mechanical characteristics include operating force, operating time, mechanism motion characteristics and other parameters, which have an important impact on the speed, stability and reliability of the circuit breaker. Therefore, it is of great significance to monitor the mechanical characteristics of the vacuum circuit breaker on-line, which can detect problems in time and maintain them to ensure the normal operation of the equipment.

2. On-line monitoring method of mechanical characteristics of vacuum circuit breaker

2.1 operating force monitoring

by installing a force sensor or a pressure sensor, the operating force of the vacuum circuit breaker is monitored. When the operating force is abnormal, it may mean that mechanical parts are worn, poor lubrication and other problems, and timely monitoring can avoid failures.

2.2 operation time monitoring

the operating time of the vacuum interrupter, I .e., the time required to open or close the circuit, is monitored by a sensor. The extension of the operating time may indicate that the mechanical parts are worn or poorly lubricated, and need to be repaired in time.

2.3 mechanism motion characteristic monitoring

the motion characteristics of the vacuum circuit breaker mechanism, such as vibration, displacement and other parameters, are monitored by acceleration sensors or displacement sensors. Abnormal vibration or displacement may indicate loose or damaged mechanical parts, requiring repair and maintenance.

2.4 data acquisition and analysis

the data monitored by the sensor is transmitted to the monitoring center in real time through the data acquisition system, and the data is analyzed and processed. By establishing appropriate monitoring models and algorithms, abnormal mechanical characteristics can be found in time, equipment failures can be predicted, and the reliability and operating efficiency of vacuum circuit breakers can be improved.

3. Application of online monitoring methods

3.1 preventive maintenance

by monitoring the mechanical characteristics of the vacuum circuit breaker online, preventive maintenance can be realized, problems can be found and repaired in advance, and the impact of equipment failure can be avoided.

3.2 fault diagnosis

the online monitoring method can help to quickly locate the fault cause of the vacuum circuit breaker, reduce the troubleshooting time and improve the accuracy of fault diagnosis.

3.3 operation optimization

through the on-line monitoring and analysis of the mechanical characteristics of the vacuum circuit breaker, the operating parameters of the equipment can be optimized, the life of the equipment can be extended, and the operating efficiency of the equipment can be improved.

Vacuum circuit Breaker the on-line monitoring method of mechanical characteristics is of great significance, which can help to improve the reliability and operation efficiency of vacuum circuit breaker, and reduce the fault occurrence and maintenance time. The wide application of online monitoring technology in power system will help to ensure the safe operation of equipment and improve the stability and reliability of power system.