ATP on the impact analysis of an independent power producer in a distribution network

Abstract

The main task in this paper is to present a performance analysis of a distribution network in the presence of a synchronous generator with its speed and voltage regulators, in parallel with the distribution system, for distributed generation studies. Must be highlighted that this generator is driven by a steam turbine, and the whole system with regulators and the equivalent of the power authority system in the point of connection are modeled in the "ATP -Alternative Transients Program". Technical questions studied here refer to steady-state voltage profile, voltage stability, voltage dip due to a balanced three-phase fault, load rejection, distribution line outage and the behavior of machine regulators facing the aforementioned contingencies. Results show that, in some cases, the independent generation can be a menace to the physical integrity of the system and in other cases can be very beneficial to the distribution system in the point of connection.

Independent power producer parallel operation modeling in transient network simulations for interconnected distributed generation studies

“…However, in such references a simpler voltage regulator model was used. It can be observed that the results obtained in [10,11] are more oscillatory. This fact was not present in the simulations made here, due to the fact that a more efficient voltage regulator model was used, showing that in previous studies the results obtained had pessimistic responses.…”

“…In Refs. [10,11] similar simulations were performed. However, in such references a simpler voltage regulator model was used.…”

“…Immediately after the load rejection, the voltage magnitude at this busbar reaches 1.03 pu, 7.128 kV phase-phase. Accordingly, an adequate protection must be designed to disconnect the independent power producer generator, in order that the remaining equipment of the independent power producer may not be affected by such disturbance [10,11].…”