الفهرس 
THE THEORY OF THE GRID-CONNECTED THREE-PHASE INVERTEROnly 14 pages are availabe for public view
 |  | from | 32 |  |  |
| | | from | 32 | | |
Abstract
This thesis demonstrates the design of a control algorithm for the grid-connected inverter, which is considered an important section in renewable-energy conversion systems. The thesis is arranged into four main parts:
Firstly, the main hardware topologies of the renewable-energy conversion systems are presented. Then the block diagram of the grid-connected inverter and its control objectives are discussed.
Secondly, this thesis introduces a comprehensive study of the three-phase grid-connected inverter with grid side controller. Initially, the stand-alone three-phase inverter is discussed. This is followed by a presentation of the mathematical model of the grid-connected inverter. After that, the possible current control strategies for the grid-connected inverter are studied. Then the PWM techniques of the three-phase inverter are addressed. After that, the synchronization algorithms for the grid-connected inverter are introduced. Finally, a discussion of grid filters topologies for interfacing the distributed generation with national electricity grid is provided.
Thirdly, the stand-alone and the grid-connected inverter systems are modeled based on the theoretical basics presented in the previously. These systems are then simulated to verify the effectiveness of its control structure and to determine its performance parameters using PSIM simulation package.
Finally, complete experimental versions for both the stand-alone and the grid-connected inverter are presented. The major differences between the simulation model and the experimental version are clarified.