Study on Islanding Detection for Distributed Type Photovoltaic Power Generation Systems
| Autor: | Feng-Yi Lin, 林峰誼 |
|---|---|
| Rok vydání: | 2009 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 97 This thesis presents the modeling of a photovoltaic power generation system and islanding detecting methods by using Matlab/Simulink simulation software. First of all, the study carried out modeling, simulation, and analysis for output characteristics of the solar cell modeling under the environment of different temperatures and sunlight intensities. Moreover, the study built solar power tracking model by using the DC/DC boost conve rter and perturbation & observation algorithm. Finally, the system can operate in a grid-connected mode for supplying A.C. source to the loads. The islanding phenomenon resulted from the system in a grid-connected mode that has hazards to load, inverter and personnel security, so all grid-connected inverters should have the ability to detect islanding status and stop the run mode of grid-connect. This thesis introduces the background of islanding detection of grid-connect inverter and the system equivalent mode. And the study deeply discuss the principle of current disturbance and frequency drift method between active islanding detection system and inverter. By analyzing the simulation result, the islanding phenomenon can also be detected under the condition of power matching. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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