电气传动2017，Vol.47Issue(7)：37-42,6.DOI:10.19457/j.1001-2095.20170708
基于电容电压前馈的LCL逆变器并网控制
Grid-tied Control of LCL Inverter Based on Capacitive Voltage Feed-forward
李锐 1邓磊 1李小谦 1徐正喜 1刘邦银2
作者信息
- 1. 武汉第二船舶设计研究所,湖北 武汉 430000
- 2. 强电磁工程与新技术国家重点实验室,湖北 武汉 430000
- 折叠
摘要
Abstract
LCL filter for smoothing grid current of PV inverter is better than simple L-filter. However,there is possible instability of the LCL filter system caused by the zero impedance at the resonance frequency. The stability degradation phenomenon of the inverter with inverter side current control with increasing of digital delay was revealed. Then inverter side current control scheme based on capacitive voltage feed-forward was proposed. The inverter side current control scheme based on capacitive voltage feed-forward realized the reduction of system order by the feed-forward of capacitance voltage and effectively improved the stability of system. Then the influences of digital delay and feed-forward coefficient on the stable effect of capacitance voltage feed-forward were analyzed in detail. The effectiveness of the control strategy is verified by experimental results in a 630 kW three-phase grid-tied inverter.关键词
并网逆变器/LCL滤波器/电容电压前馈/数字延时Key words
grid-tied inverter/LCL filter/capacity voltage feed-forward/digital delay分类
信息技术与安全科学引用本文复制引用
李锐,邓磊,李小谦,徐正喜,刘邦银..基于电容电压前馈的LCL逆变器并网控制[J].电气传动,2017,47(7):37-42,6.
