基于电容电压全前馈的LCL型并网逆变器控制  

LCL Grid-Connected Inverter Control Basedon Capacitor Voltage Feedforward

作　　者：陈道峰 王宾[1] 程军辉[1] CHEN Dao-feng;WANG Bing;CHENG Jun-hui(School of Electrical and Information Engineering,Anhui University of Science and Technology,Huainan 232001,Anhui,China)

机构地区：[1]安徽理工大学电气与信息工程学院,安徽淮南232001

出　　处：《兰州文理学院学报（自然科学版）》2024年第6期72-76,共5页Journal of Lanzhou University of Arts and Science(Natural Sciences)

基　　金：安徽省高校优秀青年人才支持计划(gxyq2022064)。

摘　　要：对于LCL型并网逆变器,采用全前馈方案可以显著改善电网注入电流的质量,但是,由于升压变压器的漏感特性,导致无法直接测量电网电压,因此,这种方案的可行性受到了限制.为了解决电网电流畸变的问题,本文提出了一种新的电容电压全前馈方案,它将比例分量和二阶导数分量结合起来,并且在二阶导数分量中添加低通滤波器,从而使得整个可控频率范围内的电流具有正等效的特性,通过Simulink仿真,验证了本文方法的有效性.For LCL grid-connected inverters,the full feedforward scheme can significantly improve the quality of grid injection current.However,due to the leakage characteristics of the boost transformer,it is impossible to measure the grid voltage directly.Therefore,the feasibility of this scheme is limited.In order to solve the problem of power grid current distortion,a new full-feedforward scheme of capacitor voltage is proposed in this paper,which combines the proportional component and the second-order derivative component,and adds a low-pass filter to the second-order derivative component,so that the current in the whole controllable frequency range has positive equivalent characteristics.Through SIMULINK simulation,this paper verifies the effectiveness of this method.

关 键 词：并网逆变器 电容电压全前馈 低通滤波器 电流畸变 

分 类 号：TM464[电气工程—电器]