多谐振与电网电压前馈控制的并网逆变器研究  

Research on grid-connected inverter based on multi-resonant controllers and grid voltage feed-forward control

作　　者：焦龙 鲁西坤 刘万兵[2] 吕建光 Jiao Long;Lu Xikun;Liu Wanbing;Lv Jianguang(School of Electronic Information and Electrical Engineering,Anyang Institute of Technology,AnYang 455000,Henan,China;Henan Ancai Hi-Tech Co.,Ltd.AnYang 455000,Henan,China)

机构地区：[1]安阳工学院电子信息与电气工程学院,河南安阳455000 [2]河南安彩高科股份有限公司,河南安阳455000

出　　处：《船电技术》2023年第8期74-79,共6页Marine Electric & Electronic Engineering

摘　　要：针对电网背景谐波造成并网电流畸变问题。本文提出了一种多谐振与电网电压前馈复合控制策略。该复合控制策略由电容电流反馈、网侧电感电流反馈和电网电压前馈组成。其中网侧电感电流反馈采用比例多谐振加相位补偿控制,在抑制低次谐波的同时,提高系统相位裕度。而LCL谐振尖峰由电容电流反馈构成的有源阻尼来抑制。电网电压前馈可提高系统响应速度,改善系统动态性能。最后,仿真实验验证了所提复合控制策略具有良好的稳态和动态性能,可以有效抑制电网背景谐波,提高并网电流质量。In order to address the problem of distortion of the grid-connected current caused by the harmonics of the grid,this paper proposes a multi-harmonics and grid voltage feed-forward composite control strategy.The composite control strategy consists of capacitive current feedback,grid-side inductive current feedback and grid voltage feedforward.Among them,the grid-side inductor current feedback is controlled by multi-resonance plus phase compensation,which improves the phase margin of the system while suppressing the low harmonics.The LCL resonance peaks are suppressed by active damping formed by capacitive current feedback.Grid voltage feedforward improves the response speed of the system and enhances the dynamic performance of the system.Finally,simulation experiments verify that the proposed composite control strategy has good steady-state and dynamic performance,and can effectively suppress grid background harmonics and improve the quality of the grid-connected power.

关 键 词：有源阻尼 多谐振控制器 相位补偿 电网电压前馈 

分 类 号：TM464[电气工程—电器]