Analyses of mechanical characteristics of vacuum circuit breaker during the closing process taking electrodynamic force into account

Wang, X.; Rong, Mingzhe; Wu, Yi; Yang, Fei; Jia, Shenli

doi:10.1049/iet-smt:20060122

Cited by 4 publications

(1 citation statement)

References 8 publications

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“…Consider the closing operation of the circuit breaker on the actual power line. Due to the pre‐breakdown phenomenon, the dynamic contact will be subjected to an electrodynamic force in the opposite direction of movement, resulting in a decrease in closing speed [24]. Therefore, the closing speed slightly faster than the mechanical requirements of the arc‐extinguishing chamber in scheme 2 under no‐load operation appears more reasonable.…”

Section: Motor‐breaker Online Experimentsmentioning

confidence: 99%

Research on Motor Drive Technology for an Operating Device of 126 kVVacuum Circuit Breaker

Wang

Lin

et al. 2023

IEEJ Transactions Elec Engng

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This study has designed a set of motor operating devices for a 126 kV vacuum circuit breaker (VCB) to improve its reliability and controllability. A finite‐angle permanent magnet brushless motor (FAPMBM) with a multi‐slot stator structure and a dovetail rotor structure has been designed based on the torque and speed requirements of the motor. These requirements were determined by a dynamic analysis of the operating device and its short‐time, finite‐angle working characteristics. The work performance of the prototype motor has been evaluated in an online experiment with a 126 kV VCB, and based on this, a segmented control method has been designed. The motion process of the operating device has been divided into four stages in combination with the output torque demand of the driving motor. At each stage, the output torque of the motor has been changed dynamically to prevent contact collision, shorten the pre‐breakdown time, and make the circuit breaker work more reliably. The results show that the FAPMBM can meet the operating time and speed requirements of the interrupter for the operating device. In addition, the segmented control method improves the work reliability and optimizes the movement of the operating device, which helps the circuit breaker work intelligently. © 2023 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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Section: Motor‐breaker Online Experimentsmentioning

confidence: 99%