A New Load Prediction Method and Management of Distributed Power System in Island Mode of a Large Hospital

The purpose of this paper is to analysis a frequency stability of a large hospital grid for a combination of emergency generators (EGs) with a photovoltaic power generation (PV). A system frequency of the grid can be controlled by a droop controller of emergency generator system when the system has installed only one EG without PV system. When the PV system will install on the grid, the emergency generator system should be distributed to some generators of small type. It is reason why the power balance cannot keep the stabilize of the system frequency within all of power range due to too large EG. Since distributed generation system need a demand for each generator, it is important to predict a load. This paper presents a new load prediction method and management for stabilization with island mode in the large hospital power grid. It is clarified that the deviation of the system frequency has improved a stabilization using the proposed prediction method.