电工技术学报2017，Vol.32Issue(z1)：178-185,8.DOI:10.19595/j.cnki.1000-6753.tces.L70043
提高LCL型并网逆变器阻抗重塑控制鲁棒性的延时补偿方法
A Delay Compensation Method of the Grid-Connected Inverter with LCL Filter to Improve Robustness of the Impedance Shaping Control
谢文浩 1刘一琦 2王建赜 1纪延超 1于继来1
作者信息
- 1. 哈尔滨工业大学电气工程及自动化学院 哈尔滨 150001
- 2. 东北林业大学机电工程学院 哈尔滨 150040
- 折叠
摘要
Abstract
The impedance shaping control is capable to increase output impendence of the grid-connected inverter with LCL Filter, enhancing the harmonic-rejection-ability against the grid-voltage distortions. However, digital control method is applied with a control delay, which decreases the stability of the inverter as well as the output impedance at the frequencies above 1/6 of the sampling frequency (fs/6). In this paper, a discrete state predicting method for LCL filter is proposed to modify the virtual impedance by compensating the phase lag in control loop. The proposed strategy can effectively increase the output impedance to improve robustness of the impedance shaping control, and exhibit strong rejection ability of grid-voltage harmonics. Experimental results with a LCL-type three-phase grid-connected inverter verify the validity of the proposed strategy.关键词
并网逆变器/阻抗重塑/延时/补偿Key words
Grid-connected inverter/impedance shaping/time delay/compensation分类
信息技术与安全科学引用本文复制引用
谢文浩,刘一琦,王建赜,纪延超,于继来..提高LCL型并网逆变器阻抗重塑控制鲁棒性的延时补偿方法[J].电工技术学报,2017,32(z1):178-185,8.
