Penetration of Photovoltaic-Synchronous Diesel Generator Systems without Storage for Isolated Area

Synchronous Diesel Engine Generator (DEG) is commonly used to supply electric power in isolated and communal areas where grid electricity network is not available. DEG has been chosen because of its easiness to engineer and construct. However, DEG is costly due to high fuels consumption. The way to reduce cost of DEG is hybrid system with Photovoltaic-Inverter (PV). The purpose of this study is to present the simulation of DEG-PV off-grid hybrid power system without battery and dummy load. The study was conducted by running simulations between DEG and PV with different generating capacity to find out the most efficient system. All the simulations were performed using Matlab/Simulink. The result of the three simulations are known that the power, voltage and frequency can be controlled properly in changing situation. In this study shows that Case 2 is the most feasible because diesel always work above 30% of its capacity and fuel of DEG more efficient after injected power PV on the system. Case 3 shows that even though the fuel usage is the lowest but at certain time the electricity generated by DEG in very low (<30%) making DEG system inefficient.