基于改进型滑模观测器的飞轮储能系统控制方法  

Research on FESS Control Based on the Improved Sliding-mode Observer

作　　者：刘文军[1] 周龙[1] 唐西胜[1] 齐智平[1] 

机构地区：[1]中国科学院电工研究所,北京市海淀区100190

出　　处：《中国电机工程学报》2014年第1期71-78,共8页Proceedings of the CSEE

基　　金：国家863高技术基金项目(2011AA05A113);中科院知识创新工程重要方向项目(KGCX2-EW-330)~~

摘　　要：该文分析了飞轮电机高速运转时滑模观测器估算角度存在偏差的原因,提出一种补偿截止频率等于电机电气频率的自适应低通滤波器固定滞后角的角度偏差消除方法,并改进了滑模观测器。通过稳定性分析得到了改进型滑模观测器的稳定条件。为了实现飞轮电机全速度范围的无速度传感器控制,采用基于模拟角的电流闭环控制实现飞轮电机的起动和低速运行,在转速达到某个设定值时切换到滑模变结构控制。给出了基于改进型滑模观测器的飞轮储能系统充放电控制方法。在充电和待机时采用了速度外环、电流内环的双闭环控制策略,在放电时采用了电压外环、电流内环的双闭环控制策略。进行了飞轮储能系统的起动、充电、待机、放电实验,实验结果验证了基于该改进型滑模观测器的飞轮储能系统控制方法的正确性和有效性。By analyzing the error between the actual angle and the sliding-mode observer＇s estimated angle when a flywheel motor operates at a high speed, an angle error elimination method compensating a constant lag angle of an adaptive low-pass filter whose cutoff frequency equals to the motor electrical frequency was proposed, and then the sliding-mode observer was improved. The stability condition was derived after conducting stability analysis of the improved sliding-mode observer. In order to realize the flywheel motor sensorless control at the whole speed range, a current closed-loop ） control based on emulated angle was used at startup and low speeds, then the control was switched to sliding mode variable structure control when the flywheel speed increases to a set value The FESS charge and discharge control algorithm based on the improved sliding-mode observer was presented. In charge and s^ndby mode, the dual closed-loop control strategy employing an outer speed loop and an inner current loop was used, while in discharge mode, the dual closed-loop control strategy employing an outer voltage loop and an inner current loop was used. Experiments in startup, charge, standby and discharge mode have been conducted. Experimental results validate the correctness and effectiveness of the FESS control algorithm based on the improved sliding-mode observer.

关 键 词：滑模观测器 无传感器 自适应滤波器 飞轮储能系统 充放电控制 永磁同步电机 

分 类 号：TK02[动力工程及工程热物理] TM91[电气工程—电力电子与电力传动]