Research on the Simulation Method of Dynamic Response of High Voltage Circuit Breaker During Operation

2016 ◽  
Author(s):  
J. G. Yang ◽  
K. Zhao ◽  
Y. Pan ◽  
X. D. Liu
Keyword(s):  
High Voltage ◽  
Dynamic Models ◽  
Circuit Breaker ◽  
Simulation Method ◽  
Circuit Breakers ◽  
High Voltage Circuit Breaker ◽  
Element Simulation ◽  
Simulation Based ◽  
Mechanical Faults ◽  
The Operating Mechanism

High voltage circuit breaker (CB) is one of the most important components in high voltage circuit. In the process of operation, some kinds of mechanical faults such as jam fault, component deformation and component failure may occur and affect the performance of the circuit breaker. But, generally it is difficult to diagnose these faults. To obtain the characteristics of these faults in the high voltage circuit breaker, in this paper, a simulation method for high voltage circuit breakers is investigated. Firstly, the dynamic models of the operating mechanism of the high voltage circuit breaker are established and the simulations are performed; then the vibration signals at the monitoring points can be obtained based on finite element simulation. Based on these signals, the characteristics of some typical mechanical faults may be researched. The work in this paper is helpful to recognize the failure mechanism of the high voltage circuit breaker and improve the veracity of the fault diagnosis.

Research on High Voltage Circuit Breaker Mechanical Faults Online Monitoring

2014 ◽  
Vol 521 ◽  
pp. 362-365 ◽  
Author(s):  
Yu Sheng Quan ◽  
Zi Jian Wang ◽  
Yan Wu ◽  
Lin Jie Fang
Keyword(s):  
High Voltage ◽  
Distribution System ◽  
Circuit Breaker ◽  
Equivalent Circuit Model ◽  
Circuit Breakers ◽  
Reactive Component ◽  
High Voltage Circuit Breaker ◽  
Mechanical Faults ◽  
On Line ◽  
Curve Fitting Method

In power transformation and distribution system, unplanned blackouts caused by high voltage circuit breaker faults accounted for more than 60% of the total accidents [, most of the circuit breaker faults are caused by mechanical faults. Base on circuit breaker electrical characteristics, this paper present a method of circuit breaker mechanical faults on-line monitoring. Switching on-off of circuit breakers contacts can be equivalent to a time-varying capacitance, based on equivalent circuit model, the relationship between reactive component and time can be concluded. Processing circuit breakers contacts electric signals with orthogonal decomposition and least squares curve fitting method to highlight the main characteristics of the mechanical faults. These processed data collected from different running state can create a database, taking this database as diagnostic basis to diagnose whether mechanical faults occur to circuit breaker.

scholarly journals A Study on the Dynamic Responses and Joints Clearance Optimization of the Planar Operating Mechanism of High-Voltage Circuit Breaker

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Xiaofeng Li ◽  
Shijing Wu ◽  
Xiaoyong Li ◽  
Deng Zhao ◽  
Qiaoquan Li
Keyword(s):  
Mechanical System ◽  
High Voltage ◽  
Reaction Force ◽  
Circuit Breaker ◽  
Dynamic Responses ◽  
Operating Mechanism ◽  
Negative Effects ◽  
Flexible Links ◽  
High Voltage Circuit Breaker ◽  
The Operating Mechanism

The operating mechanism is responsible for a large part of machinery faults of high-voltage circuit breaker, which plays a crucial role in the reliability of the power grid. It consists of multiple flexible links connected by revolute joints with inevitable clearances between adjacent links. Flexible links and joints clearance have negative effects on the performance of the whole mechanical system. In this study, the dynamic simulation model of the multiple links articulated operating mechanism is built, and its validity is testified by operation experiment. Then, numerical simulation investigations are implemented to analyze the effects of flexible links and joints clearance on the dynamic responses of the operating mechanism. The results demonstrate that both flexible links and joints clearance exert associated negative effects on the mechanism performance. Furthermore, aimed at improving the dynamic characteristics of the operating mechanism, the joints clearance sizes are selected as design variables, and correlated optimization works are performed. After that, the acceleration and reaction force curves of the mechanical system become smoother, and the amplitudes of the two curves are reduced distinctly.

scholarly journals Development and Fault Prediction of a New Operating Mechanism of HTPPM

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Hongkui Yan ◽  
Xin Lin ◽  
Jianyuan Xu
Keyword(s):  
Neural Network ◽  
High Voltage ◽  
Ant Colony Algorithm ◽  
Circuit Breaker ◽  
High Energy ◽  
Least Square ◽  
Fault Prediction ◽  
High Energy Density ◽  
Circuit Breakers ◽  
High Voltage Circuit Breaker

In this article, we take a 126 kV single-break vacuum circuit breaker as the research object and study the application of high-energy-density PM motor in the high-voltage circuit breaker for the first time. The PM motor maintains maximum power density and torque density during the start-up phase. Note that most of the faults of high-voltage circuit breakers are mechanical faults. We designed a set of mechanical fault prediction systems for high-voltage circuit breakers. We present the prediction method of the opening and closing action curve of the high-voltage circuit breaker. It is inspired by Chaos Ant Colony Algorithm (CAS) and an optimized Long- and Short-Term Memory (LSTM) cycle neural network. We constructed the main structure of the neural network expert system and established the fault prediction model of the high-voltage circuit breaker, based on the LSTM cycle neural network, optimized by CAS. We used the improved least-square method to achieve the operation accuracy of the phase control switch. Finally, we completed the development and experiment of the prototype.

scholarly journals Research on the Difference Mechanism of High Voltage Circuit Breaker’s Opening/Closing Coil Current

2021 ◽  
Vol 261 ◽  
pp. 01014
Author(s):  
Yi Su ◽  
Yufeng Lu ◽  
Lei Zhang ◽  
Xiajin Rao
Keyword(s):  
High Voltage ◽  
Circuit Breaker ◽  
Structural Difference ◽  
Circuit Breakers ◽  
Coil Current ◽  
Factors Affecting ◽  
The Operating Mechanism ◽  
The Difference ◽  
Protection And Control ◽  
And Control

High voltage circuit breakers are important protection and control equipment for the power grid. The defects and faults of the circuit breaker seriously affect the safety and stability of the power system. As the key component of the operating mechanism of the circuit breaker, the opening/closing coils contain a large amount of information about the operating status of the mechanism. In order to investigate the cause of the difference in the current waveforms, this paper analyzes the factors affecting the circuit breaker opening/closing coil current based on the actual high voltage circuit breaker, and distinguishes the characteristics of the current caused by the environmental difference and Structural difference. At the same time, the characteristics of coil current changes under four different types of mechanism defects are analyzed. These results lay the foundation for status evaluation of high voltage circuit breakers based on opening/closing coil current.

Research on Acoustic Mechanical Fault Diagnosis Method of High Voltage Circuit Breaker Based on Improved EEMD

2014 ◽  
Vol 687-691 ◽  
pp. 1054-1057 ◽  
Author(s):  
Xian Ping Zhao ◽  
Zhi Wan Cheng ◽  
Xiang Yu Tan ◽  
Wei Hua Niu
Keyword(s):  
Fault Diagnosis ◽  
High Voltage ◽  
Circuit Breaker ◽  
Vibration Signal ◽  
Fault Classification ◽  
Support Vector ◽  
Circuit Breakers ◽  
High Voltage Circuit Breaker ◽  
Fast Independent Component Analysis ◽  
Diagnosis Method

High voltage circuit breaker is one of the most significant devices and its health status will impact security of the power system. In this paper, the method of high voltage circuit breakers mechanical fault diagnosis is discussed, fault diagnosis method based on vibration signal is proposed. Firstly, the collected acoustic signals are proceed by blind source separation processing through fast independent component analysis. Then, the acoustic signal feature vector is extracted by improved ensemble empirical mode decomposition (EEMD) and the residual signal is filtered by fractional differential. Finally, the feature vectors are input into support vector machine (SVM) for fault diagnosis. Experiment shows that the proposed method can get more precise fault classification to high voltage circuit breakers.

Simulation Study on the Control Valve in Hydraulic Operating Mechanism of the High Voltage Circuit Breaker

2008 ◽  
Author(s):  
Wei Liu ◽  
Huayong Yang ◽  
Bing Xu ◽  
Zhongyu Wu
Keyword(s):  
High Voltage ◽  
High Speed ◽  
Circuit Breaker ◽  
Operating Time ◽  
Research Work ◽  
Control Valve ◽  
Simulation Software ◽  
Operating Mechanism ◽  
High Voltage Circuit Breaker ◽  
The Operating Mechanism

High voltage circuit breaker is an important interrupting device in a power system network. The operating mechanism is a key component of circuit breakers. The action of hydraulic operating mechanism in circuit breaker is different from general hydraulic mechanism for its high speed, short operating time and high pressure. In this paper, the working principle of hydraulic operating mechanism of 252kv high voltage circuit breaker is introduced. The high response speed solenoid pilot direction control valve is analyzed. The dynamic characteristic of the valve affects the performance of the hydraulic operating mechanism. Mathematical models of the valve and system have been developed. Simulations are carried out with AMESIM, hydraulic simulation software, and ANSOFT, electromagnetic simulation software. The characteristics of the operating mechanism control valve are discussed with the consideration of the influence of the geometry and environmental parameters. As the result of the research work, the simulation models and results provide the effectively theoretical guidance for the design and optimization of hydraulic operating mechanism.

scholarly journals CFD Simulation of Transonic Flow in High-Voltage Circuit Breaker

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Xiangyang Ye ◽  
Mahesh Dhotre
Keyword(s):  
High Voltage ◽  
Transonic Flow ◽  
Distribution Systems ◽  
Cfd Simulation ◽  
Circuit Breaker ◽  
Circuit Breakers ◽  
High Voltage Circuit Breaker ◽  
The Impact ◽  
Transmission And Distribution ◽  
Prediction Capability

A high-voltage circuit breaker is an indispensable piece of equipment in the electric transmission and distribution systems. Transonic flow typically occurs inside breaking chamber during the current interruption, which determines the insulating characteristics of gas. Therefore, accurate compressible flow simulations are required to improve the prediction of the breakdown voltages in various test duties of high-voltage circuit breakers. In this work, investigation of the impact of the solvers on the prediction capability of the breakdown voltages in capacitive switching is presented. For this purpose, a number of compressible nozzle flow validation cases have been presented. The investigation is then further extended for a real high-voltage circuit breaker geometry. The correlation between the flow prediction accuracy and the breakdown voltage prediction capability is identified.

Research on Remote Fault Diagnosis of High Voltage Circuit Breakers Based on LabVIEW

2013 ◽  
Vol 765-767 ◽  
pp. 2294-2298
Author(s):  
Pei Zhang ◽  
Shu Tao Zhao ◽  
Lu Shen ◽  
Jing Guo ◽  
Xiao Qian Tian
Keyword(s):  
Fault Diagnosis ◽  
High Voltage ◽  
High Speed ◽  
Circuit Breaker ◽  
Fault Analysis ◽  
Accurate Information ◽  
Circuit Breakers ◽  
High Voltage Circuit Breaker ◽  
Analysis Theory ◽  
Maintenance Personnel

In order to ensure the reliability of the operational of circuit breaker, we used intelligent monitoring unit to realize the high-speed acquisition of the electrical, mechanical and insulated signal in the operation of the high voltage circuit breaker and actuator. Combined with signal processing and fault analysis theory, we estimate the operating status based on the accurate acquisition of the various operating parameters in breaker actuator. We also developed a system of remote online monitoring of circuit breaker status and fault diagnosis. The system ensures reliable operation of the circuit breaker. It also provides fast and accurate information for operation scheduling and maintenance personnel and accumulates large amounts of raw data for the state overhaul of the circuit breaker.

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