电网技术Issue(2)：275-280,6.DOI:10.13335/j.1000-3673.pst.2014.02.001
直流微电网中光伏发电系统的比例-积分-谐振控制
Proportional-Integral-Resonant Control of Photovoltaic Generation System in DC Microgrid
摘要
Abstract
When DC microgrid supplies single-phase AC inverters, the ripple with two-fold AC frequency will appear in the voltage of DC-link bus, it leads to periodic fluctuation in the output of grid-connected photovoltaic (PV) generation system and solar cells cannot operate continuously at its maximum power point, thus the generation efficiency of PV generation system is decreased indirectly. In allusion to it, on the basis of analyzing output characteristics of PV generation system under DC-link voltage with periodic perturbation, a proportional-integral-resonant (PIR) control strategy for output current of PV generation system is proposed. The proportional- integral controller is used for static control under steady state and the resonant controller for suppressing periodic perturbation. The steady state error, stability of the proposed method as well as the impact of control parameter variation on current control performance and the effect of suppressing DC voltage fluctuation are analyzed in depth, and in the further, the principle of selecting parameters is given. The correctness and feasibility of the proposed method as well as results of theoretical analysis are verified by results of both simulation and experiments.关键词
直流微电网/光伏发电/直流电压波动/比例-积分-谐振控制/效率优化Key words
DC microgrid/photovoltaic generation/ripple in DC-link voltage/proportional-integral-resonant control/efficiency improvement分类
信息技术与安全科学引用本文复制引用
吴凤江,孙醒涛..直流微电网中光伏发电系统的比例-积分-谐振控制[J].电网技术,2014,(2):275-280,6.基金项目
国家自然科学基金项目(51107018)；高等学校博士学科点专项科研基金项目(20102302120013)；黑龙江省博士后科研启动金资助项目(LBH-Q11109)。Project Supported by National Natural Science Foundation of China (51107018) （51107018）
The Research Fund for the Doctoral Program of Higher Education (20102302120013) （20102302120013）
The Assisted Project by Heilongjiang Postdoctoral Funds for Scientific Research Initiation (LBH-Q11109) （LBH-Q11109）
