武汉工程大学学报2016，Vol.38Issue(3)：293-298,6.DOI:10.3969/j.issn.1674⁃2869.2016.03.018
基于前馈和PI控制的光伏离网逆变器的研究
Off-Grid Inverter Based on Feed-Forward and Proportional Integral Control
摘要
Abstract
Aimed at the measuring interference in proportional integral(PI)control, the micro off-grid photovol?taic inverter with feed-forward and current feedback PI compensator was designed. The small signal model of ideal flyback converter was constructed by the state-space averaging method to derive the transfer function from the input and output signal. Then the control algorithm of the micro off-grid photovoltaic inverter with feed-forward compensator and PI controller was designed. To verify the proposed algorithm, the real-time photovoltaic(PV) panel voltage, alternating current(AC) output voltage and AC output current were sampled and calculated by the microcontroller to generate the sinusoidal pulse width modulation(SPWM)waveform, which could drive the switch to realize direct current(DC)-DC boost converter and DC-AC converter. Finally, the stable sinusoidal output was obtained. The effectiveness and feasibility of control algorithm was verified by the experiments.关键词
微型光伏离网逆变器/前馈控制/比例积分控制/总谐波系数Key words
micro off-grid photovoltaic inverter/feed-forward control/proportional integral control/total har⁃monic distortion分类
信息技术与安全科学引用本文复制引用
王晓敏,李自成,剪浩杰,刘星雨..基于前馈和PI控制的光伏离网逆变器的研究[J].武汉工程大学学报,2016,38(3):293-298,6.基金项目
湖北省自然科学基金项目(2014CFB776) （2014CFB776）
武汉工程大学研究生创新基金(CX2014043) （CX2014043）
