Impact of Multi-Distributed Generation on Key Parameter in Distribution System

Analysis on the Impact of Renewable Energy to Power System Fault Level

“…Based on other research works, high level of DG penetration is likely to give a negative impact to the grid; change of voltage profile along the distribution network, increase in short circuit level, voltage transients due to connection and disconnection of DG, distruption in power quality and reliability of the system including overloading of lines and equipment that leads to thermal overloading. The severity of these issues depends on the penetration level of solar PV, the load characteristics, distribution system configuration and the location of solar PV in distribution system as shown in previous researchs [6][7], [11], [13][14]. Results obtained from previous research have shown that 25% DG penetration improves the transient stability of the grid, while the connection and high penetration of DG causes disturbance such as increase in fault level and affect power system protection performance [4], [11], [23].…”

“…Therefore, power system fault level should be monitored in order to maintain the reliability of protection equipment and availability of power supply to the customers. Two main factors that influence the impact of DG to power system reliability: first, the characteristic of distribution networks such as line impedance and system load [6] and second the DG itself such as type, location and size of DG that is to be connected to power system network [6][7], [11], [13][14].…”