Title

Composite Controller For Grid Connected Photovoltaic Systems

Keywords

Auto-disturbance rejection controller; Cycle discrete control; Grid-connected photovoltaic system; Maximum power point tracking

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.

Publication Date

3-1-2008

Publication Title

High Technology Letters

Volume

14

Issue

1

Number of Pages

24-29

Document Type

Article

Personal Identifier

scopus

Socpus ID

41649085058 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/41649085058

This document is currently not available here.

Share

COinS