A Hospital Grid with Renewable Energy System Applied to Virtual Power Plant

This paper presents to propose a modelling for virtual power plant with renewable energy system installed in a hospital, which is applied to demand response (DR) using emergency generators (EGs). In our previously works, in a hospital with one EG with output of 1000 kVA at rated, assuming an islanded operation in the event of a disaster, the conventional EG will be miniaturized and distributed power source by considering the installation planning of renewable energy. We have proposed an optimization method that minimizes fuel consumption by operating EGs and evaluated the power balance during islanding from the actual total load in the hospital assuming combined use of photovoltaic (PV). Therefore, this paper proposes a modelling that can apply the hospital as a virtual power plant (VPP) connecting with the utility grid based on the results of the previous works. The model can contribute to the stabilization of the power grid by supporting demand response while preventing EG depletion. It is confirmed that the proposed model can scale the actual load measured at the disaster base hospital and the measured PV output and give it to the model to grasp the state of the purchased power from the power system and support DR. As a result, it was found that it can also be applied to contract power planning.