有源滤波器的模糊阈值变环宽滞环电流跟踪控制策略  

A fuzzy threshold mutative bandwidth hysteresis current tracking control method for active power filter

作　　者：刘心旸[1] 王杰[1] 王昕[2] 姚钢[1] 

机构地区：[1]上海交通大学电气工程系,上海200240 [2]上海交通大学电工与电子技术中心,上海200240

出　　处：《电力系统保护与控制》2011年第11期116-123,共8页Power System Protection and Control

基　　金：国家自然科学基金项目(60674035)~~

摘　　要：针对有源电力滤波器(APF)的电流跟踪功能模块,提出了一种模糊阈值变环宽滞环电流跟踪控制算法。在构建APF装置模型并分析滞环宽度变化规律的基础上,通过使用内部模糊控制器用以动态地调节滞环比较器的环宽,从而达到了限定开关频率的目的。该方法相比于传统滞环比较方法具有更好的跟踪精度和动态性能,充分利用了开关器件的导通能力;同时由于降低了最大开关频率,从而保证了装置的安全运行。通过仿真与实际实验结果进一步验证了该算法的电流跟踪效果以及对于非线性装置产生的系统谐波的补偿能力。A fuzzy threshold mutative bandwidth hysteresis current tracking control method for the Active Power Filter （APF） current tracking module is presented.Based on the construction of APF device model and the analysis of the variation of hysteresis width,the purpose to achieve a limited frequency of switching is reached by using an internal fuzzy controller to dynamically adjust the loop width of hysteresis comparator device.Compared with the traditional hysteresis method,the proposed method has more excellent dynamic response and tracking precision,taking full advantage of conduction capability of the power switches,moreover,a reduction of the maximum switching frequency ensures that the device operates safely.Finally,the current tracking efficiency of the method above and the harmonic compensating capability to nonlinear loads are demonstrated by the simulation and experiment results in this paper.

关 键 词：有源电力滤波器 电流跟踪控制 开关频率 滞环比较 模糊阈值 

分 类 号：TM761[电气工程—电力系统及自动化]