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

Li, Xiaofeng; Wu, Shijing; Li, Xiaoyong; Zhao, Deng; Li, Qiaoquan

doi:10.1155/2019/9019718

Cited by 3 publications

References 33 publications

(34 reference statements)

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Fault Diagnosis of High-Voltage Circuit Breakers Using Mechanism Action Time and Hybrid Classifier

Wan

Chen

2019

IEEE Access

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Accurate fault diagnosis of high-voltage circuit breakers is crucial for the safety of power grids. Mechanism action time, though can reflect the state of high-voltage circuit breakers, is usually difficult to obtain, as multiple sensors are required for acquisition. To solve this problem, a novel method that can extract mechanism action time from vibration signals was proposed in this paper. The method involved enhancement of vibration signals using short-time zero-crossing rate and determination of mechanism action time by the double threshold method. Then, time parameters were utilized to calculate singular spectrum entropy as the input vector for a classifier. Finally, a hybrid classifier that involved support vector data description and extreme learning machine was developed to identify faults. The hybrid classifier can not only classify known mechanical states but also detect unknown mechanical faults of high-voltage circuit breakers. The effectiveness of the proposed method was verified using a 35-kV high-voltage circuit breaker.

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Fault Diagnosis of High-Voltage Circuit Breakers Using Mechanism Action Time and Hybrid Classifier

Wan

Chen

2019

IEEE Access

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Research on Fault Pre-Warning of Loose Terminal Blocks in Circuit Breaker Operating Mechanisms Based on Log Edge Detection

Qiu,

Ran,

et al. 2023

2023 3rd International Conference on Electrical Engineering and Control Science (IC2ECS)

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Dynamics Optimization Research and Dynamics Accuracy and Reliability Analysis of a Multi-Link Mechanism with Clearances

et al. 2022

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With the development of high-speed and lightweight mechanisms, and the continuous improvement of manufacturing accuracy requirements in industrial production, clearance joints have increasingly become one of the key factors affecting dynamics performance. Poor clearance will seriously compromise stability, accuracy, and dynamics performance. Based on a genetic algorithm, an efficient modeling methodology for the dynamics optimization of a planar complex multi-link mechanism containing multiple clearance joints is put forward. The model comprises a 2-degree of freedom (DOF) nine-bar mechanism that can be used as the main transmission mechanism of a hybrid drive multi-link press, which is taken as the research object. The optimization objective is to minimize the maximum acceleration of the slider and minimize the difference between the actual central trajectory and the ideal trajectory. By optimizing the quality parameters of key components, an optimal solution for the design parameters is obtained, and the effects of the different optimizations of the objective functions on dynamics response are compared and analyzed. At the same time, a new modeling and calculation methodology of the dynamics accuracy and reliability of a complex multi-link mechanism in terms of multiple clearances is proposed, and the effect of optimization on dynamics accuracy and the reliability of the mechanism is analyzed. Based on the optimization results obtained by taking the minimum difference between the actual center trajectory and the ideal trajectory as an optimization objective, the nonlinear characteristics before and after optimization are analyzed through a phase diagram and Poincaré map. A test platform was built to study the dynamics of the mechanism with clearances. Research not only provides a basis for the dynamics optimization of a multi-link mechanism containing clearances but also provides reference significance for the reliability analysis of a multi-link mechanism containing clearances.

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

Cited by 3 publications

References 33 publications

Fault Diagnosis of High-Voltage Circuit Breakers Using Mechanism Action Time and Hybrid Classifier

Fault Diagnosis of High-Voltage Circuit Breakers Using Mechanism Action Time and Hybrid Classifier

Research on Fault Pre-Warning of Loose Terminal Blocks in Circuit Breaker Operating Mechanisms Based on Log Edge Detection

Dynamics Optimization Research and Dynamics Accuracy and Reliability Analysis of a Multi-Link Mechanism with Clearances

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