Circuit breaker energy storage mechanical failure analysis
A new identification method of high voltage circuit breaker mechanical ...
To extract the state information contained in the vibration signals, in this paper we propose a new method for the mechanical fault identification of circuit breakers based on the joint analysis ...
Fault Diagnosis Method of Energy Storage Unit of Circuit Breakers …
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 Sparrow Search Algorithm (ISSA) optimized Backpropagation Neural Network (BPNN) is proposed to improve the operational safety of LVCB.
Mechanical Condition Identification and Prediction of Spring …
Spring operation mechanism is widely used in high voltage circuit breakers, and its reliability is related to the ability of the circuit breaker breaking fault current. During the life cycle of spring operating mechanism, stress relaxation, metal fatigue, and any other mechanical defects are easily occurring. And the mechanical performance of the circuit …
Mechanical defect diagnosis of high voltage circuit breakers …
2.1 Stroke curve analysis and feature extraction of closing state of high voltage circuit breaker. The overall layout of the simulation experiment platform for CT20 high voltage circuit breaker is shown in Fig. 1 order to reduce the cost of mechanical characteristic measurement using actual high voltage circuit breaker and enhance the …
A fault identification method for circuit breaker energy storage mechanism, combined with current–vibration signal entropy weight characteristic and Grey Wolf Optimization–Support Vector ...
Harm Analysis of Spring Defects in Circuit Breaker Mechanical Failure
Download Citation | Harm Analysis of Spring Defects in Circuit Breaker Mechanical Failure | With the continuous development of the power system, the importance of circuit breakers has gradually ...
Mechanical failure diagnosis of high voltage circuit breaker based …
And then concrete analysis and illustrates the principle of on-line monitoring which is related to intelligent circuit breaker mechanical properties, such as closing coil current and the energy ...
Mechanical Fault Diagnosis of Circuit Breaker Based on
To improve the extraction efficiency of the mechanical fault features of the circuit breaker and the recognition of the fault type. First, extract the 20-dimensional time-domain characteristics of the mechanical vibration signal waveform of the circuit breaker to form a fault feature set, and form a reference matrix of the standard pattern of 4 types of …
Mechanical defect diagnosis of high voltage circuit breakers …
Circuit breaker is an important control and protection equipment in substation, which plays the role of fault line removal, controlling power equipment and transmission line access or exit from power grid [1, 2] s reliable action is the basic guarantee for the safe and stable operation of power system [].Therefore, the defect …
a method of implementing a solid-state circuit breaker that achieves both fast switching and low conduction losses. Mechanical Circuit Breakers Ubiquitous work horse, but too slow for new demands . Circuit breakers historically have been mechanical and have the benefits of low contact resistance and good isolation.
Failure analysis of phase B pull rod of HGIS circuit breaker …
The B-phase pull rod of HGIS circuit breaker operating mechanism in a 220kV substation was broken at the root. The broken pull rod was analyzed by macro examination, metallographic examination, chemical composition analysis, fracture morphology analysis and impact test to find out the reason for the fracture.
Analysis of Stress and Fatigue Life of Circuit Breaker Opening …
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 …
Failure Analysis of Ultra-High Strength Bolt of Circuit Breaker
Screw mechanism fixing bolt fracture failure of a 500kV circuit breaker spring mechanism running process. By analyzing the installation position and operating …
Harm Analysis of Spring Defects in Circuit Breaker …
Once the circuit breaker fails, it will bring harm to the operation of the entire power system and cause a large-scale power outage [7]. In order to avoid such accidents, this article will start with the plum blossom defects of the circuit breaker, deeply analyze the core factors that cause the defects of the circuit breaker and give a ...
g. Poor mechanical or cold solder joints. h. Condition of circuit breaker and fuses. i. Insufficient clearance between exposed current carrying parts and ground or poor in-sulation of exposed terminals. j. Broken or missing safety wire, broken bundle lacing, cotter pins, etc. k. Operational check of electrically oper-ated equipment such as ...
3. The spring operating mechanism closing energy storage circuit failure. Failure phenomenon. The opening operation cannot be realized after closing; The energy storage motor does not stop running, and even causes the motor coil to overheat and damage. Cause Analysis
Failure analysis of phase B pull rod of HGIS circuit breaker …
The B-phase pull rod of HGIS circuit breaker operating mechanism in a 220kV substation was broken at the root. The broken pull rod was analyzed by macro examination, metallographic examination, chemical composition analysis, fracture morphology analysis and impact test to find out the reason for the fracture. The results showed that: 1. Due to …
Mechanical Fault Diagnosis of Circuit Breaker Based on
In this experiment, 100 circuit breaker mechanical failure sample signals of 4 types of circuit breaker mechanical failure, including normal state, are obtained. In this subject, Gaussian white noise with a signal-to-noise ratio of 20 dB–40 dB is added to the measured signals of the original circuit breaker mechanical failure test samples.
Closing Switch Spring Reliability Analysis & Improvement of High ...
Considering closing spring failure of operating mechanisms in high voltage circuit breaker,reliability design theory was applied to analyze it,and found reason of spring failure because of lacking fatigue reliability,and offered some measures to solve the problem convention design theory,spring parameters such as outer load,geometry,and material …
Review on Mechanical Fault Diagnosis Methods for High-voltage Circuit ...
Mechanical failure is still the main fault type of high voltage circuit breaker. Timely and accurate diagnosis of mechanical fault of high voltage circuit breaker is the key to realize the ...
Fault Diagnosis of Circuit Breaker Energy Storage …
The spring operating mechanism of the circuit breaker needs to sequentially control the energy storage motor, the gear transmission device, the spring energy storage medium, the stop plate and the limit switch before the opening and closing operation to realize the conversion, transmission and storage of the grid power to the spring mechanical ...
Remaining useful life prediction of circuit breaker operating ...
To improve the accuracy of the mechanical fault diagnosis of the operating mechanism and fully exploit the characteristic information in the vibration signal of the high-voltage circuit breaker, a ...
Evaluation method of fault severity of energy storage spring of …
In order to accurately evaluate the fault severity of energy storage spring, a fault severity evaluation method of energy storage spring of circuit breaker based on …
Fracture Failure Analysis of the Energy Storage Spring of the Circuit ...
[1] Wang Lianpeng 2005 Optimal design and analysis of the spring actuator for vacuum circuit breaker High Voltage Apparatus 41 166-167 etc. Google Scholar [2] Shu Fuhua 2007 Closing switch spring reliability analysis and improvement of high voltage circuit breaker operating mechanisms High Voltage Apparatus 43 368-370 etc. …
Fault Diagnosis Method of Energy Storage Unit of Circuit …
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 Sparrow Search Algorithm (ISSA) optimized Backpropagation Neural Network (BPNN) is …
Failure Analysis of Ultra-High Strength Bolt of Circuit Breaker
The energy storage motor of the circuit breaker mechanism is fixed with other parts of the mechanism through four M8 bolts. ... Among the many causes of mechanical failure, the circuit breaker body and operating mechanism are the main defects of the circuit breakers 8. ... Lipirodjanapong S, Suwanasri T, et al. Failure rate …
Although conventional electromechanical circuit breakers have a proven record as effective and reliable devices for circuit protection, emerging power distribution technologies and architectures, such as dc microgrids, require improved interruption performance characteristics (e.g., faster switching speed). The need for faster switching …
Fundamentals of HV circuit breakers (applications, failure analysis …
Therefore, high voltage circuit breakers, designed to interrupt faulted conditions, have played an important role in power systems over 100 years since the first introduction of oil circuit breakers. The maintenance programs of HV circuit breakers have been long performed by using the manufacture guidelines and experiences of operators.
Fracture Failure Analysis of the Energy Storage Spring of the …
Through a macro inspection, chemical composition analysis, hardness inspection, graphite carbon inspection and energy spectrum analysis, the reason for the …
Study on Mechanical Characteristics and Life Extension of …
2.1 VD4 Overall Structural Composition. As 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 [].The operating mechanism includes a planar worm spring, a spindle, a multi-stage …
Study on Closing Spring Fatigue Characteristics of High Voltage Circuit ...
One 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. ... Ding Qi and Zhao Shutao 2019 Circuit …
Diagnosis method on the mechanical failure of high voltage circuit ...
Mechanical fault diagnosis of a circuit breaker can help improve the reliability of power systems. Therefore, a new method based on multiscale entropy (MSE) and the support vector machine (SVM) is ...
