Modeling and control of solar photovoltaic systems connected to a weak power grid

• Main Author: Wang, Yaxin
• Other Authors: Tang Yi
• Format: Final Year Project
• Language: English
• Published: 2016
• Subjects: DRNTU::Engineering
• Online Access: http://hdl.handle.net/10356/69376
• Institution: Nanyang Technological University

Photovoltaic (PV) system is usually used to supply the voltage need in remote area, island and someplace where the load is relative small. In these areas, the voltage level is usually medium or lower and the grid presents the weak grid characteristics. This paper aims at built the single-phase PV inverter system under weak grid, the main circuit topology of two-stage without the transformer structure is established. First of all, according to the specific structure of the single-phase photovoltaic grid-connected system, the control method based on the maximum power point tracking is adopted for the photovoltaic power supply, the main circuit structure of the Boost structure is adopted for the DC conversion circuit, the closed-loop feedback control of the voltage and current. Then, according to the specific grid-connected inverter, a simulation model is set up in MATLAB/Simulink software, and the simulation waveform and analysis are given to verify the scientificity and effectiveness of the method.