Abstract
This paper deals with the energy management of a hybrid power system, which consists of a photovoltaic (PV) system, diesel generators, battery, and ultracapacitor for a mobile hospital. The proposed power system can supply energy to shelter hospitals for better treatment of patients in remote states, particularly in the event of a pandemic situation such as Coronavirus Disease 2019 (COVID-19). For this reason, a hybrid power system in which a diesel generator is used with a photovoltaic energy source for reliable availability of power supply. Moreover, battery and ultracapacitor are also integrated to obtain a hybrid power generation and storage system to ensure the smooth operation of mobile hospitals irrespective of weather conditions. A boost converter is used with PV panels to operate them in either maximum power tracking mode or power curtailment mode. The battery is connected to a bidirectional reversible DC-DC converter for direct-current (DC) bus voltage regulation and state of charge control. The ultracapacitor is associated with the battery to compensate for the peak power. The diesel generator is connected in parallel with the photovoltaic generator, battery, and ultracapacitor to continuously provide the power required by the load. The integrated operation of all generation sources and storage systems is complex for shelter hospitals. Therefore, an efficient energy management algorithm is developed to manage the continuous energy flow between different elements of the hybrid power system and mobile hospital load through the control of the power converters. Finally, validation results are presented to show the effectiveness of the proposed energy management algorithm for the hybrid power system.
Highlights
In remote areas and in the sub-Saharan territories, the low population distribution causes difficulties in ensuring on-site health coverage in emergency cases requiring medical evacuation, such as the Coronavirus Disease 2019 (COVID-19) pandemic [1,2]
This paper proposes a new energy flow supervision for a PV-diesel-hybrid energy storage system (HESS) microgrid that efficiently manages the operation of generation and storage systems in different
After the low-pass filter (LPF) of the current reference, the high-frequency component of the DC bus is passed to the ultracapacitor and the low-frequency component goes to the battery controller
Summary
In remote areas and in the sub-Saharan territories, the low population distribution causes difficulties in ensuring on-site health coverage in emergency cases requiring medical evacuation, such as the Coronavirus Disease 2019 (COVID-19) pandemic [1,2]. The management of all these generation sources and storage systems presents a major challenge in determining the relationship between energy production and consumption in a mobile hospital In this context, there are few research studies in the literature that address this problem [11]. The techno-economic potential of hybrid power generation systems is studied for refugee camps and rural areas [15,16] All these studies do not consider a mobile hospital, which is needed in the case of medical emergencies. In [25,26], a transition control strategy between the connected and disconnected modes of the grid was proposed for a three-phase voltage source based on the calculation of reference powers and a virtual impedance control strategy to achieve efficient power distribution in the hybrid energy storage elements, where the battery provides steady-state power and supports only transient power fluctuations. For the efficient operation of all these generation sources and storage systems, an energy management algorithm is developed to manage the energy flow between the sources and load through effective control of power converters
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