电力电子控制电动机操动机构分闸运动特性的仿真分析  

Simulation and Analysis on Switching-Off Motion Characteristic of Permanent-Magnet Synchronous Motor Driven Operating Mechanism Controlled by Power Converters for Circuit Breakers

作　　者：张忠蕾[1] 李庆民[1] 娄杰[1] 

机构地区：[1]山东大学电气工程学院,山东省济南市250061

出　　处：《电网技术》2006年第18期58-63,共6页Power System Technology

基　　金：山东省自然科学基金资助项目(Q2004F03)。~~

摘　　要：电力电子控制的电动机操动机构的完全可控性和高可靠性,使得高压断路器相控开关技术的实用化成为可能。建立了基于永磁同步电动机操动机构的动态数学模型;分析了拐臂初始位置角的影响,指出其最优取值范围为40o^60o。针对分闸运动过程,采用常规比例–积分–微分(proportionalintegraldifferential,PID)和反推式控制方法进行了仿真分析,结果表明2种控制策略都能实现预定分闸速度特性的跟踪控制,使断路器工作在最佳状态,但控制器参数的选取会影响到跟踪控制精度。为解决该问题,采用基于最优二次型学习算法的单神经元PID速度控制器,取代定参数的传统PID控制器,结果表明,该控制策略能够达到完全跟踪的效果,提高了控制的有效性,是电动机操动机构的理想控制方法。The complete controllability and high reliability of motor-driven operating mechanism controlled by power converters make the application of phase-control switching technique to high voltage circuit breakers possible. The authors establish a dynamic mathematical model for the operating mechanism based on permanent-magnetic synchronous motor （PMSM）; analyze the influence of geometric angle of oscillating arm＇s initial position and point out that its optimal range is from 40° to 60°. The switching-off process is analyzed by means of conventional PID control and back-stepping control, analysis results show that the two control strategies can realize the tracking control of predefined switching-off speed characteristic and make the circuit breaker working at its optimal condition, however, the selection of the controller will influence the accuracy of tracking control. To solve this problem, a single neuron PID speed controller is adopted to substitute conventional PID controller with preset parameters. Test results show that such a control strategy can achieve the effect of complete tracking and improve the effectiveness of the control, thus this control strategy is an ideal control strategy for PMSM-based operating mechanism.

关 键 词：电动机操动机构 断路器 电力电子变换器 速度跟踪 

分 类 号：TM561[电气工程—电器]