Abstract
This work presents the analysis of short-circuit at solar power plant
along with calculations,in three part series. The solar power plant is
privately owned with rated capacity of 415 kW capable to produce minimum
of 880 kWh , providing electricity to six consumers hospital,
market/business center, industrial facility, two sectors comprising 400
households and to the Govt. owned 1 MVA, 11kV/400V, Dyn11 distribution
transformer. In this study, twelve faults at certain conditions which
bypass protectionary switch gear and trigger short circuit in the plant,
as per electrical NEC standards is modeled with practical real-world
operating conditions, has been analyzed. The failure of protectionary
circuit from faults resulting in complete destruction of the solar plant
but the successful protection of the DISCOM substation has been analyzed
and presented with parameters. In this study, all the faults excluding
the faults due to faulty battery management has been collectively
presented which trigger uncontrolled short-circuit. The faults have been
deliberately induced in the normal operating conditions and twelve such
faults at consumer and grid site have been analyzed.