Abstract
In this paper a new concept for control and performance assessment of compressed air energy storage (CAES) systems in a hybrid energy system is introduced. The proposed criterion, based on the concept of energy harvest index (HEI), measures the capability of a storage system to capture renewable energy. The overall efficiency of the CAES system and optimum control and design from the technical and economic point of view is presented. A possible application of this idea is an isolated community with significant wind energy resource. A case study reveals the usefulness of the proposed criterion in design, control and implementation of a small CAES system in a hybrid power system (HPM) for an isolated community. Energy harvested index and its effectiveness in increasing the wind penetration rate in the total energy production is discussed.
Highlights
Based on global policy on control and reduction of greenhouse gas (GHG) emissions peak by 2020, numerous studies have suggested the implementation of renewable energy sources (RES) in futureElectronics 2014, 3 electrical power systems
Comprehensive model of a typical battery comprises three sub-models: a thermal sub-model to represent the electrolyte temperature based on the thermal properties of the material and battery losses; the charge and capacity model to depict the state of the charge (SOC) and depth of discharge current (DOC); and an equivalent circuit to simulate the dynamic performance of the battery [18]
A hybrid power system (HPS) can be either a grid-connected or isolated power system, this study focuses on an isolated community
Summary
Based on global policy on control and reduction of greenhouse gas (GHG) emissions peak by 2020, numerous studies have suggested the implementation of renewable energy sources (RES) in future. Despite its environmentally friendly nature, high life cycle, and inexpensive configuration; the overall efficiency and attractiveness of a typical CAES system has been subject to question in energy related industries This doubt originates from a traditional point of view, where the excess energy was provided by burning fossil fuel in power plants. The maintenance cost after installing energy harvesting equipment is the only expense required by a RES based power system It can benefit from a vast amount of free energy to compensate for its lower efficiency in comparison with other technologies. A new criterion based on the limited storage capacity of storage systems is developed This concept is used for the control and performance assessment of a small-scale wind-based hybrid power system (HPS) for possible application in a remote community
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