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电网技术  2006 

电力电子控制电动机操动机构分闸运动特性的仿真分析

, PP. 58-63

Keywords: 电动机操动机构,断路器,电力电子变换器,速度跟踪

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Abstract:

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。

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