Embodiments of the present specification generally relate to a power generation system having an energy storage system, and more particularly to an energy storage system having an auxiliary direct current (DC) bus to provide power to auxiliary loads using multiple energy sources.
As will be appreciated, an energy storage system is an electrical power storage and distribution system. Typically, the energy storage system includes power buses, energy storage devices, power electronic circuits, and auxiliary loads. The power electronic circuits include inverters and converters.
Typically, the power generation system and in particular, the energy storage system includes a main bus. The auxiliary loads are coupled to the main bus. Traditionally, a single energy source is used to supply power to the auxiliary loads via the main bus. Any fault in the energy source results in a disruption in supply of power to the auxiliary loads, thereby compromising the reliability of the power generation system. Also, use of a single DC bus to provide power to the auxiliary loads may result in a complex architecture of the power generation system.
In recent times, in addition to the main bus, the power generation system includes additional buses to supply power to the auxiliary loads. Even though the additional buses are employed, faults in the energy source that supplies power to the auxiliary loads tend to lower the reliability of the associated power generation system.