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

Mohd Sharif, Faiz Farhan (2017) Design And Modelling A Single-Phase Grid-Connected Photovoltaic At Low Voltage Network And Its Performance Using PSCAD Software. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) Design And Modelling A Single-Phase Grid-Connected Photovoltaic At Low Voltage Network And Its Performance Using PSCAD Software.pdf - Submitted Version Download (496kB)

Abstract

The interest for distributed generation (DG) and its integration into the utility grid has gradually increased since the demand of electricity increases from time to time. Due to the economic and environmental issue, the interest to use renewable energy sources (RES) for DG system become more popular. Solar (PV) generation was chosen for this project since Malaysia receive direct sunlight approximately 10 hours during a day. However, there are some issues occur when DG system was connected with the grid such as synchronization issue, overvoltage and undervoltage issue, and stability issue. The aim for this project is to examine the impacts on grid and load side based on power injected from single-phase grid-connected photovoltaic system. In order to complete the modelled circuit, block diagram is used to show the flow of this project. The circuit was modelled using PSCAD software and the performance of the single-phase grid-connected PV system will be analysed based on a few case studies which are import and export power at point of common coupling (PCC), effect of excessive power to support load without grid connection, effect of power injected from PV model against voltage impact with grid connection, fault analysis at load, and analyse fault current contribution from PV model and from grid using Microgrid model. From all case studies, it can be conclude that the PV model able to export active and reactive power to grid and load when load demand is less than the power generated by PV model while grid will support the insufficient power needed by load if load demand greater than power generated by PV model. Besides that, power received by load will affect the voltage across the load. PV model should able to generate sufficient output power to prevent undervoltage and overvoltage problem which can cause damage to equipment. Voltage profile can be improved by connecting the PV model at the furthest load in Microgrid model as furthest load have the highest voltage drop. Lastly, different types of fault could give different amount of fault current in the system. Fault current contribution is higher when the location of fault near the power source. As conclusion, the single-phase grid-connected photovoltaic that have been modelled able to be used to produce results for the case studies.

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