In practical engineering, the mechanical state of circuit breaker is different and the mechanical characteristic curve is similar, so it is easy to be misdiagnosed using single signal to diagnose the defects of high voltage circuit breakers. In view of this problem, this paper proposes a defect diagnosis method based on the combination of …
Fault diagnosis of circuit breaker energy storage mechanism based on current-vibration entropy weight characteristic and grey wolf optimization–support vector machine IEEE Access, 7 ( 2019 ), pp. 86798 - 86809
Aiming at the problem of energy storage unit failure in the spring operating mechanism of low voltage circuit breakers (LVCBs). A fault diagnosis algorithm based on an improved …
Low Voltage Circuit Breaker. Circuit breakers are the "final control elements" of the electric power industry, akin to control valves in the process industries. They are strictly on/off devices, used to make and break connections under load in power systems. Circuit breakers automatically open when dangerous circuit conditions are detected.
To address this problem, this research put forward a hybrid method for spring energy storage state identification and successfully applied it to the operating mechanism of …
Like the large oil-filled circuit breakers seen previously, this SF6 circuit breaker has an enclosure on one side where the actuation and control components are located. Inside this enclosure we see a large stack of Belleville spring washers (the dark-colored discs located in the center of the enclosure), which are used as the mechanical …
Fault diagnosis method for energy storage mechanism of high voltage circuit breaker based on CNN characteristic matrix constructed by sound-vibration signal. September 2019. Journal of...
To address the difficulty in characterizing early mechanical faults in the trip mechanism of circuit breakers, a data mining method based on variational mode decomposition (VMD) and phase space reconstruction (PSR) method was proposed. First, the vibration signal in the trip stage was separated from the whole according to the …
The energy storage motor current signal directly reflects the energy storage state of the circuit breaker operating mechanism. Reasonable use of this signal can achieve rapid …
EP3 333 865B1 2 5 10 15 20 25 30 35 40 45 50 55 Description Technical Field [0001] The present invention relates to the field of low-voltage apparatuses, and more particularly to an energy storage operation mechanism for a circuit breaker. Background Art [0002
A fault identification method for circuit breaker energy storage mechanism, combined with the current–vibration signal entropy weight characteristic and …
A fault identification method for circuit breaker energy storage mechanism, combined with current–vibration signal entropy weight characteristic and Grey Wolf Optimization–Support Vector ...
A non-contact testing method of spring deformation characteristics based on image matching tracking technology is proposed: the high-speed camera is utilized to capture the image sequence of...
Therefore, a study on the strength and fatigue model of circuit breaker energy storage springs based on SVM algorithm is proposed. Based on the composition …
ABB''s solid-state circuit breaker can detect and respond to a short circuit fault 100 times faster than a mechanical circuit breaker. Energy storage systems and their corresponding electrical grid services are strongly affected by the downtime in case of an internal fault. Rapid disconnection of the faulted zone can prevent a shut-down of …
In traditional control circuits, actual volt-amperes (VA) are applied/injected to the command coils. However, when testing magnetically-actuated vacuum circuit breakers, only a "lower power" voltage signal is required. Instead, we need to interface with "Remote TRIP" and "Remote CLOSE" pins (5, 7, and 9) with the associated control ...
The invention discloses a system for evaluating the abnormal state of an energy storage spring of a circuit breaker, which comprises: ... the data acquisition module is used for converting the stress value data of the energy storage spring into analog signal data; ...
Abstract: Energy storage spring is an important component of the circuit breaker''s spring operating mechanism. A three-dimensional model of the opening spring and closing …
In response to the lack of generality in feature extraction using modal decomposition methods and the susceptibility of diagnostic performance to parameter selection in traditional mechanical fault diagnosis of high-voltage circuit breaker operating mechanisms, this paper proposes a Global-Local feature extraction method based on …