高技术通讯（英文版）2008，Vol.14Issue(1)：24-29,6.
A composite controller for grid connected photovoltaic systems
A composite controller for grid connected photovoltaic systems
摘要
Abstract
This paper addresses a new composite controller for a boost-buck inverter to interface the photovoltaic array with the power grid. Based on dynamically tracking the maximum power point, two novel control methodologies are proposed to control the DC-bus and the output current for the inverter. First, a new linear cycle discrete control algorithm is introduced to realize linear control of the DC-bus voltage and synchronously get the reference current for the inner current loop with a little calculation. Then, to assure a good adaptability to noise and model uncertainty, an auto-disturbance rejection controller is chosen as the output current controller, which does not depend on precise mathematics model. Thus, output current of PV system to the grid is with low harmonic distortion and unity power factor. Simulations and experiments are performed, and the results show that the system is of excellent robustness and effective.关键词
grid-connected photovoltaic system, maximum power point tracking, cycle discrete control, auto-disturbance rejection controllerKey words
grid-connected photovoltaic system, maximum power point tracking, cycle discrete control, auto-disturbance rejection controller分类
信息技术与安全科学引用本文复制引用
Dong Mi,Yang Jian,Luo An..A composite controller for grid connected photovoltaic systems[J].高技术通讯（英文版）,2008,14(1):24-29,6.基金项目
Supported by the National Nature Science Foundation of China(60474041) and National Innovation Fundation of China(05C26224301154). （60474041）
