Vibration Monitoring And Analysis Of On - Load Tap - Changer

On-load regulating transformer tap-changer is an important equipment in power system, in recent years, along with the power-grid adjustment is more and more heavy, its operation maintenance workload is becoming more and more heavy. By using the method of non intervention monitoring OLTC shifting gear vibration signal and the drive motor current signal operation, to judge the running state of OLTC and fault diagnosis, is an effective method of OLTC operation maintenance. Based on the monitoring of OLTC vibration signal, the paper analyzes the relationship of vibration signals and OLTC running state, presents the research methods of OLTC vibration monitoring data application by using correlation analysis and Mahalanobis distance. The paper studies the different mechanical structure of combined OLTC and composite OLTC, presents that the vibration signal and drive motor current signal corresponded to each phase represents the meaning of different, should be distinguished in the study. In this paper, it is concluded that the online and the offline data can be referenced for comparison in a certain range of application, and analyze the OLTC several common failure types reflect the characteristics of the information in the monitoring signal based the study. The paper studies the method that accurately extract the characteristic operation of OLTC by using wavelet transform processing OLTC vibration monitoring data. The paper studies the method that examine the similarity between OLTC running state samples using the correlation analysis method, evaluate the running state of the OLTC, judgment its fault, and evaluate OLTC equipment health in the long run. The paper studies the method that evaluate the running state of OLTC, and found abnormal operating data by using Mahalanobis distance monitoring sample data processing and straight side profile.