单相电力有源滤波器的设计  

Design of Single-Phase Active Power Filter

作　　者：陈宇昊 郑天歆 王玎楠 CHEN Yuhao;ZHENG Tianxin;WANG Dingnan(China Airborne Missile Academy,Luoyang,Henan 471009,China;The 94314 Unit of Chinese Peoples′s Liberation Army,Zhengzhou,Henan 450000,China;The 95607 Unit of Chinese Peoples′s Liberation Army,Chengdu,Sichuan 610011,China)

机构地区：[1]中国空空导弹研究院,河南洛阳471009 [2]中国人民解放军94314部队,河南郑州450000 [3]中国人民解放军95607部队,四川成都610011

出　　处：《自动化应用》2023年第22期149-151,共3页Automation Application

摘　　要：电力电子装置的广泛应用给电网注入了大量谐波,严重影响了电器设备和电力系统本身的安全稳定运行。传统的无源滤波器对于高次谐波有较好的滤波效果,但对于低次谐波的滤波效果差,且动态响应慢。本文采用DSP为控制核心,研制了单相电力有源滤波器,该装置对电网谐波进行FFT得到电网谐波的幅值、频率、相位信息,采用自适应噪声信号抵消技术,使逆变器产生一个与电网谐波幅值相等、频率相同和相位相差180°的谐波信号,抵消原来电网中的谐波,最终使电压成为标准的正弦波。该滤波器对低次谐波有很好的滤波效果,且动态响应快,响应时间不超过25 ms,总谐波畸变率小于3%。The wide application of power electronic devices injects a large number of harmonics into the power grid,which seriously affects the safe and stable operation of electrical equipment and the power system itself.Traditional passive filters have good filtering effect for high harmonics,but poor filtering effect for low harmonics and slow dynamic response.In this paper,a single-phase active power filter is developed by using DSP as the control core.The device carries out FFT on the grid harmonics to get the amplitude,frequency and phase information of the grid harmonics,and adopts the adaptive noise cancellation technology,so that the inverter generates a harmonic signal with the same amplitude,the same frequency and the phase difference of 180°with the grid harmonics,which offsets the harmonics of the original grid,and ultimately makes the voltage become a standardized sine wave.The filter has a good filtering effect on low harmonics,and has a fast dynamic response with a response time of less than 25 ms and a total harmonic distortion rate of less than 3%.

关 键 词：数字信号处理 自适应噪声信号抵消技术 电力有源滤波器 

分 类 号：TM761[电气工程—电力系统及自动化]