基于APF的电网背景谐波抑制方法研究  

Research on Method of Grid Background Harmonic Suppression Based on APF

作　　者：兰金晨 林国栋 晁武杰 林焱 LAN Jin-chen;LIN Guo-dong;CHAO Wu-jie;LIN Yan(Electric Power Science Research Institute of State Grid Fujian Electric Power Co.,Ltd.,Fuzhou 350007,China)

机构地区：[1]国网福建省电力有限公司电力科学研究院,福建福州350007

出　　处：《电力电子技术》2023年第8期66-70,共5页Power Electronics

基　　金：国网福建省电力有限公司科技项目(521304220001)。

摘　　要：针对无源滤波器在抑制电网背景谐波时易发生调谐频率偏移、易与电网产生谐波放大或谐振等问题,此处对基于有源滤波器(APF)的电网背景谐波抑制方法进行了研究。首先,从无源滤波器的背景谐波抑制原理出发,提出一种用于APF的谐波阻抗控制策略,通过调节APF支路特定频率下的阻抗来抑制电网背景谐波电压。然后,提出各电压等级应用场景下适用于谐波阻抗控制原理的APF结构。最后,通过PSCAD/EMTDC平台仿真结果和闽粤联网工程实测数据表明,该控制策略能够有效抑制电网背景谐波,具有较好的实用性。Aiming at the problems of passive power filter,such as easy cause tuning frequency offset and tend to harmonic amplification or resonance with power grid when suppressing grid background harmonic,the method of grid background harmonic suppression is studied based on active power filter(APF).Firstly,based on the background harmonic suppression principle of the passive power filter,a harmonic impedance control strategy for the APF is proposed,which suppresses grid background harmonic voltage by adjusting the impedance of the APF branch at a specific frequency.Then,the APF structure suitable for harmonic impedance control principle in various voltage level application scenarios is proposed.Finally,the simulation results of PSCAD/EMTDC platform and the measured data of Fujian-Guangdong power-interconnection engineering show that the control strategy can effectively suppress the background harmonic of the power grid and has good practicability.

关 键 词：有源滤波器 无源滤波器 谐波阻抗控制 

分 类 号：TN713.8[电子电信—电路与系统]