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
بیشتر بخوانیدIn recent years, vibration-based intelligent fault diagnosis of high-voltage circuit breakers (HVCBs) exhibits excellent performance. It requires a reliable machine
بیشتر بخوانیدaccuracy of circuit breaker energy storage mechanism. Compared with the traditional method, the proposed method has ob vious advantages, whose total accurate ra te up to 98.2 %
بیشتر بخوانیدMechanical faults are the main causes of abnormal opening, refusal operation, or malfunction of high-voltage circuit breakers. Accurately assessing the operational condition of high-voltage circuit breakers and delivering fault evaluations is essential for the power grid''s safety and reliability. This article develops a circuit breaker
بیشتر بخوانیدIn 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
بیشتر بخوانیدAiming 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
بیشتر بخوانیدMechanical faults of high voltage circuit breakers (HVCBs) are one of the most important factors that affect the reliability of power system operation. Because of the limitation of a lack of samples of each fault type; some fault conditions can be recognized as a normal condition. The fault diagnosis results of HVCBs seriously affect the operation
بیشتر بخوانیدWhile traditional AC mechanical circuit breakers can protect AC circuits, many other DC power distribution technologies, such as DC microgrids (MGs), yield superior disruption performance, e.g., faster and more reliable switching speeds. However, novel DC circuit breaker (DCCB) designs are challenging due to the need to quickly break high
بیشتر بخوانیدAiming at the problem that some traditional high voltage circuit breaker fault diagnosis methods were over-dependent on subjective experience, the accuracy was not very high and the generalization ability
بیشتر بخوانید5.1 Advantages of Application in Intelligent Substation. In the application environment of intelligent substation, the operation and maintenance of high-voltage switchgear has changed from manual patrol inspection to online monitoring, from fault repair to active repair, from post-repair to pre-warning, and from passive power failure to active
بیشتر بخوانیدelectro-mechanical devices to protect an electrical circuit. from damage caused by overload or short circuit. Its basic. function is to isolate a fault condition by interrupting cur-. rent flow
بیشتر بخوانیدInternational Journal of Frontiers in Engineering Technology ISSN 2706-655X Vol.5, Issue 10: 70-76, DOI: 10.25236/IJFET.2023.051011 Published by Francis Academic Press, UK -70- Research on Mechanical Characteristics of Circuit Breaker Operating
بیشتر بخوانیدMany documents use the key points of coil current signal to analyze the mechanical fault of circuit breaker [7][8]. The intelligent multi-classification method of support vector machine is good at
بیشتر بخوانیدAir circuit breakers (ACBs) are widely used as electro-mechanical devices to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to isolate a fault condition by interrupting current flow and if it fails to function, then it may cause a major accident. The major functions in ACB relies on
بیشتر بخوانیدThrough a macro inspection, chemical composition analysis, hardness inspection, graphite carbon inspection and energy spectrum analysis, the reason for the break of the energy storage spring of the circuit breaker in a 110kV substation are analyzed. The results
بیشتر بخوانیدAccording to the above analysis, the failure of the breaker bolt mainly exists in the following two aspects: (1) The failed bolt not only bears static load, but also withstands the pulsating load caused by external pressure and temperature changes. Since the circuit breaker adopts the spring mechanism, the operating work is large, and the
بیشتر بخوانیدCircuit breakers to become 100 times faster than electro-mechanical systems, service no longer needed as no mechanical components Prevents losses of up to $100,000 per plant from missed energy delivery and system recovery associated with a short circuit fault
بیشتر بخوانیدWith the continuous development of the power system, the importance of circuit breakers has gradually emerged, becoming a key link to ensure the normal operation of the power system. However, circuit breaker mechanical failure defects often occur in the power system, such as plum blossom contact defects, split closing coil
بیشتر بخوانیدWith a bit of masking tape, label the tripped breaker ''B'' for BAD. Locate another breaker that matches the tripped breaker and label it ''T'' for TEST. Swap the two breakers in the panel. Turn the MAIN on and flip on the two swapped circuit breakers. If ''T'' holds, and ''B'' trips, then ''B'' is likely faulty.
بیشتر بخوانیدThe high voltage circuit breaker faults are mostly caused by the change in the mechanical components or the energy conversion between the components. This change can be reflected by the variation of frequency components and intensity in the vibration signals [ 24, 25 ].
بیشتر بخوانیدA fault identification method for circuit breaker energy storage mechanism, combined with the current–vibration signal entropy weight characteristic and
بیشتر بخوانیدTherefore, a study on the strength and fatigue model of circuit breaker energy storage springs based on SVM algorithm is proposed. Based on the composition
بیشتر بخوانید2.1 VD4 Overall Structural CompositionAs shown in Fig. 1, the VD4 medium voltage vacuum circuit breaker is mainly composed of a vacuum interrupter, insulation mechanism and shell, operating mechanism, energy storage motor, and the electrical secondary circuit [].].
بیشتر بخوانیدAbstract: Energy storage spring of Circuit breaker is easy to failure, which will affect the normal operation of power system. Evaluating the severity of the fault of the energy storage spring can eliminate the fault in time and prevent its deterioration.
بیشتر بخوانیدEnergy storage 35 24472 0.143 Mechanical transmissions 82 24472 0.335 No return device 8 24472 0.033 Total 607 3. METHOD FOR ESTIMATING RELIABILITY PARAMETERS Weibull distribution technique is one of the most widely used for
بیشتر بخوانیدThe mechanical DCCB was initially applied in the LCC HVDC system for load current interruption. In 1980s, the BBC company manufactured a 500 kV/2kA passive mechanical DCCB [21].As shown in Fig. 1 (a), the passive mechanical DCCB is composed of three branches, i.e., the load current branch, the commutation branch and the energy
بیشتر بخوانیدAbstract: 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
بیشتر بخوانیدThe high voltage circuit breaker''s fault as an important form of electrical contact fault in the power system, which is extremely difficult to diagnose under the condition of small fault dataset. This paper proposes a fault diagnosis method based on multi-classification relevance vector machine for high voltage circuit breakers. To make up
بیشتر بخوانیدCircuit breakers on the filter bank branches in converter stations are vulnerable to contact wear and mechanical deterioration caused by frequent operations, which can lead to circuit breaker breakdowns and explosions. It is imperative to conduct research on the early detection of abnormal states in circuit breakers. Existing electrical
بیشتر بخوانیدOne of the most causing closing fault of high voltage circuit breaker is closing spring failure. In order to avoid such closing fault, this paper analyzed the relationship between energy of closing spring and its load, as well as the experiment carried out to get the minimum energy when closing. The time-varying static stress relaxation
بیشتر بخوانیدEnergy storage spring of Circuit breaker is easy to failure, which will affect the normal operation of power system. Evaluating the severity of the fault of the energy storage spring can eliminate the fault in time and prevent its deterioration.
بیشتر بخوانیدon Mechanical Fault Diagnosis Methods for High-voltage Circuit Breakers | Mechanical failure is still the reason for the break of the energy storage spring of the circuit breaker in a 110kV
بیشتر بخوانیدThrough a macro inspection, chemical composition analysis, hardness inspection, graphite carbon inspection and energy spectrum analysis, the reason for the
بیشتر بخوانیدDOI: 10.1016/j.egyr.2022.02.190 Corpus ID: 247240497 Improved generator circuit breaker failure protection method combined with voltage quantities @article{Feng2022ImprovedGC, title={Improved generator circuit breaker failure protection method combined with voltage quantities}, author={Xiaosong Feng and Liming Tan and Yikai Wang and Yedong Mao
بیشتر بخوانید''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
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