Abstract
Recently, integrated energy systems have become a new type of energy supply model. It is clear that integrated energy systems can improve energy efficiency and reduce costs. However, the use of a battery energy storage system (BESS) as a backup power source will affect the operating costs of a regional integrated energy system (RIES) in different situations. In this paper, a regional integrated energy system including wind turbines, photovoltaics, gas turbines and battery energy storage was introduced. In order to obtain the minimum operation cost, an operation optimization model was built. The schedule plans of each unit were optimized by a moth flame optimization (MFO) algorithm. Finally, three different scenarios were proposed for the simulation optimization. The simulation optimization results show that when the BESS is used as a backup power source, the operating cost of the system and the resulting pollutant emissions are less than the diesel generator (DG) set. Therefore, it is worthwhile to use BESS instead of DG as the backup power source in RIES.
Highlights
With the development of intelligent power distribution and energy Internet technologies, the traditional energy supply model faces enormous challenges
In addition to DG, article, we focus on the impact of as a backup power source for the operation of the battery energy storage system (BESS) can be used as a backup power source for regional integrated energy system (RIES), which can replace diesel generators
Electricity of the 30% BESS is used as a backup power source, the BESS is charged when the system is in a low power-demand period, and is discharged during a high power-demand period
Summary
With the development of intelligent power distribution and energy Internet technologies, the traditional energy supply model faces enormous challenges. It is necessary to study the operation optimization and operation cost of a regional integrated energy system (RIES) to promote the efficient development and utilization of energy. RIES is an integrated system of energy production, supply and consumption, which can realize the coordination and optimization of different energy sources in the process of energy system planning, construction, and operation. RIES is a new energy supply mode, which transforms solar energy, wind energy, geothermal energy, natural gas (NG), biomass and other resources into cold, heat, electricity and other forms of energy needed by consumers with advanced energy conversion and transmission technologies. The purpose of building an RIES is to effectively improve the efficiency of the comprehensive utilization of energy and improve the flexibility, security, economy and self-healing capacity of the energy supply system [3,4,5,6]
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