混沌算法下电力滤波器定频滞环电流控制  

Fixed Frequency Hysteresis Current Control of Power Filter Based on Chaos Algorithm

作　　者：张士荣 郭强[2] ZHANG Shi-rong;GUO Qiang(JiangSu University of Technology,Changzhou Jiangsu 213001,China;Nanjing University of Science and Technology,Nanjing Jiangsu 210094,China)

机构地区：[1]江苏理工学院,江苏常州213001 [2]南京理工大学,江苏南京210094

出　　处：《计算机仿真》2021年第9期124-128,共5页Computer Simulation

摘　　要：针对传统电力滤波器定频滞环电流控制时受谐波影响较大,存在电流控制误差较大、电流补偿效果较差等问题,提出基于混沌算法的电力滤波器定频滞环电流控制。通过建立电力滤波器数学模型,利用有源滤波器中谐波检测电路,根据基尔霍夫电流一般定律,提取电力滤波器工作特征;分析混沌算法的基本原理,利用Logistic映射获取混沌序列粒子的参数取值,完成负载电流波动轨迹的追踪;通过单相定频方法,固定开关相位与标准脉冲信号相位差,考虑误差电流变化的补偿量,实现电力滤波器定频滞环电流控制。仿真测试结果表明,与传统方法相比,采用所提方法控制电力滤波器定频滞环电流的误差较小,补偿效果以及开关频率控制效果较好。Aiming at the problems of large harmonic influence, large current control error and poor current compensation effect in the fixed frequency hysteresis current control of traditional power filter, a fixed frequency hysteresis current control of power filter based on chaotic algorithm is proposed..The mathematical model of power filter was established.The harmonic detection circuit in active power filter was applied.Based on Kirchhoff current law, the working characteristics of power filter were extracted.The basic principle of chaos algorithm was analyzed.Through the logistic mapping principle, the parameter values of chaotic sequence particles were obtained, and the tracking of load current fluctuation trajectory was realized.Single phase constant frequency was used to fix the phase difference between the switch phase and the standard pulse signal, and the compensation of error current variation was also considered.Finally, the constant frequency hysteresis current control of power filter was completed.The simulation results show that the constant frequency hysteresis current, compensation effect and switching frequency control effect of the proposed power filter are better than those of the traditional power filter.

关 键 词：混沌算法 电力滤波器 轨迹追踪 定频滞环电流 

分 类 号：TM761[电气工程—电力系统及自动化]