CAJ | 학술논문

基于电磁推力机构的快速开关,在电力系统的诸多领域具有广阔的应用前景.提出并研究了一种用于真空开关的音圈电动机式脉冲推力机构,具有结构简单、动作速度快、易于控制等优点.该推力机构的控制系统由基于电力电子PWM技术的可控脉冲放电电源和反馈控制器组成.针对开关触头分、合闸速度的最优跟踪控制,提出了无速度传感器的直接电磁力反馈控制方法;仿真结果表明,该方法利于实现动态过程优化并可获得较高的动作速度.设计了可控旁路放电的电磁缓冲方案,可有效解决触头的颤振问题.
기우전자추력궤구적쾌속개관,재전력계통적제다영역구유엄활적응용전경.제출병연구료일충용우진공개관적음권전동궤식맥충추력궤구,구유결구간단、동작속도쾌、역우공제등우점.해추력궤구적공제계통유기우전력전자PWM기술적가공맥충방전전원화반궤공제기조성.침대개관촉두분、합갑속도적최우근종공제,제출료무속도전감기적직접전자력반궤공제방법;방진결과표명,해방법리우실현동태과정우화병가획득교고적동작속도.설계료가공방로방전적전자완충방안,가유효해결촉두적전진문제.
Electromagnetic repulsion mechanism-based fast switch will find wide applications in many fields of power systems. A new permanent magnet-based motor-coil repulsion mechanism is proposed for vacuum circuit breakers, with preferable merits of simple structure, fast operation speed and high controllability. The control system of the mechanism is composed of a controllable pulsed discharge voltage source based on power electronics PWM technique and a feedback controller. With regard to optimal tracking control of switching speed of moving contacts, a methodology of direct driving force control without speed sensors is presented, simulation results of which show it is convenient for realizing dynamic optimization and fast operation. An electromagnetic relaxation scheme of triggered bypass discharge is designed to effectively counteract the bouncing phenomenon in impact of moving contacts.