Event timing and shape analysis of vibration bursts from power circuit breakers

Abstract

Abstmct4oninvasive vibmtion diagnostic techniques plf? implemented to assess the mechanical condition of power cizcuit breakers. A diagnostic system, the Prototype Commercial PoltaMe Diagnostic System (E"DS) has been developed Hardware of the €"DS includes a poltable computer, and a data acquisition unit and computer communication cruds. Signal pmcessing techniques include the discrete energy sQCstics envelope, short-time p w e r spectnmq timing extraction algorithm and chi-square based shape test Decision-making is canied out via a voter pmgiam, to which individual resulb fmm the timing and shape analysis pm~grams am passed. Statistical and empirical htsholds have been established, that classify the cinxit breaker as Wig in Normal-Transitional-Abnormal (Green-Yellow-Red) condition.

The Design of Real-time Monitoring System for Operation State of High Voltage Circuit Breaker

“…In the actual process of analysis, finding out the characteristic quantity by the analysis of collected vibration information, try to represent the process by the least characteristic parameters, so as to distinguish difference between normal and abnormal state. But a lot of time domain analysis of the characteristics of the vibration signal showed that the dispersion is bigger, poor repeatability and also found some vibration waves whose time domain are different obviously are normal waves, and the identical vibration could have bigger differences in local by sampling again and disposing [5]. Therefore, only by using time domain index as characteristics of vibration signals of circuit breaker operation is not scientific.…”

Fault diagnosis for high voltage circuit breaker based on timing parameters and FCM

“…In order to get the CB operating characteristics, preventive test is adopted in the preventive maintenance. This kind of method has a series of disadvantages, including timeconsuming, frequent operation and excessive maintenance; all of this will reduce the reliability of the CB and bring negative influence [1,2]. So vibration diagnostic techniques of CB have gradually become a research hotspot in recent years [3].…”

A New Fault Diagnosis Method for High Voltage Circuit Breakers Based on Wavelet Packet and Radical Basis Function Neural Network

“…Mechanical fault occupies a large proportion in the high voltage circuit breaker fault. Therefore, mechanical faults were extensively studied at present [1][2][3].…”