Impact of PV Penetration on MV Feeder of NUST /

Abstract

Integration of distributed generation into existing network can solve the problem of soaring energy demand owing to exponential growth in population. Integration of distributed generation has increased as it offers many advantages like optimal loading of transmission network, decrease in line losses and improved voltage profile. Increased penetration of distributed generation on low voltage feeders has changed the distributed network from passive to active one. Despite of many advantages distributed generation also poses various adverse effects on network like harmonics, blinding of feeder protection, frequency instability, increase in short-circuit current and rise in feeder voltage above the nominal value. However, it is difficult to eliminate distributed generation faulty behavior due to its dispersed nature, that might effect the performance of power system protection, which is due to the change in power flow and magnitude of fault current. In this research the effect of distributed generation on system voltage, fault current level and protection of radial distribution feeder of National University of Science and Technology is studied. Three phase fault is simulated and analyzed for radial distribution network of National University of Science and Technology in MATLAB/Simulink. The work also suggests the maximum amount of distributed generation penetration that is feasible without violating feeder nominal voltage limits.