分段式注入下逆变器并网系统谐波自动化抑制研究  

Research on automatic harmonic suppression in grid connected inverters system with segmented injection

作　　者：周健 焦康威 ZHOU Jian;JIAO Kangwei(Jiangsu Power Transmission and Transformation Co.,Ltd.,Nanjing 210028,China;Nanjing Institute of Technology,Nanjing 211112,China)

机构地区：[1]江苏省送变电有限公司,江苏南京210028 [2]南京工程学院,江苏南京211112

出　　处：《电子设计工程》2024年第21期127-131,共5页Electronic Design Engineering

摘　　要：逆变器并网时电压畸变影响谐波检测,导致电流波动较大,为此提出分段注入谐波自动化抑制法。通过多模态分解原始谐波信号,引入劳斯判据对逆变器侧的反馈电压进行抑制。结合谐波电流旋转角速度建立空间状态模型识别谐波特性,计算调制参量与开关函数,分段注入稳态电流补偿谐波,实现谐波自动化抑制。实验结果表明,该方法将谐波分量百分比降至1.0%以下,有效减小了并网电流波动,实现了逆变器并网系统谐波的自动化高效抑制。When the inverter is connected to the grid,voltage distortion affects harmonic detection,leading to large current fluctuations.Therefore,a segmented injection harmonic automation suppression method is proposed.By decomposing the original harmonic signal into multiple modes and introducing the Routh criterion,the feedback voltage on the inverter side is suppressed.Establish a spatial state model based on the rotational angular velocity of harmonic currents to identify harmonic characteristics,calculate modulation parameters and switching functions,inject steady⁃state current compensation harmonics in segments,and achieve automatic suppression of harmonics.The experimental results show that this method reduces the percentage of harmonic components to below 1.0%,effectively reducing grid current fluctuations and achieving automated and efficient suppression of harmonics in inverter grid connected systems.

关 键 词：分段式注入 逆变器 信号谐波特性 谐波抑制 

分 类 号：TM355[电气工程—电机]