Design And Modelling A Three-Phase Grid-Connected Photovoltaic At Low Voltage Network And Its Performance Using PSCAD Software

Aminuddin, Nurul Nadia (2017) Design And Modelling A Three-Phase Grid-Connected Photovoltaic At Low Voltage Network And Its Performance Using PSCAD Software. Technical Report. UTeM, Melaka. (Submitted)

Text Design And Modelling A Three-Phase Grid-Connected Photovoltaic At Low Voltage Network And Its Performance Using PSCAD Software - Nurul Nadia Aminuddin - 24 pages.pdf - Submitted Version Download (376kB)

Abstract

Solar photovoltaic generation system is one of distributed generation (DG) that can generated electricity power to support load demand. Solar energy is the cleanest, sustainable and environmentally friendly renewable energy. Environment in Malaysia is more suitable for solar generation compared to wind generation since Malaysia receive sunlight for almost 10 hours a day besides wind speed in Malaysia is not enough to generate electricity. Since the output of the PV generation need to connect with grid network, there could a few issues occur. The issues that may occur including synchronization issue, overvoltage and undervoltage issue, and stability issue. The aim for this project is to analyze the impact of power generated by three-phase grid-connected photovoltaic system towards grid and load. Power System Computer Aided Design (PSCAD) software was used to model the three-phase grid-connected PV system. The flow of the three-phase grid-connected PV system was illustrated in block diagram to summarize the actual circuit. The performance of three-phase grid-connected photovoltaic system was analyzed based on several case studies which includes the import and export of active and reactive power at point of common coupling (PCC), impact of excessive power to support load demand without grid connection, effect of generated power from PV model toward voltage impact at distribution network including Microgrid and analysis of abnormal condition at PV model. From the case studies, it can be concluded that voltage across load was affected by the amount of power generated from PV model and capacity of the load. PV model also have a capability to export its generated power to grid and load. Besides that, generated power from PV model must equal with load demand to prevent undervoltage and overvoltage problem which can cause damage to equipment. In Microgrid model, it can be conclude that by connecting the PV model to the furthest load from utility grid can improves its voltage profile. Lastly, different types of fault give different amount of fault current. Three-phase fault will provide the highest fault current in the system and amount of generated power from PV model also can affect the amount of fault current in a system. As conclusion, three-phase grid-connected photovoltaic system that have been modelled able to be used in completing the case studies.

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