Abstract
Energy storage equipment is an important part of integrated energy systems, but the construction and operational costs of it are great. Therefore, it’s difficult to apply energy storage equipment on a large scale. As an alternative measure, adjusting controllable loads including electric vehicles (EVs) and air conditioning loads jointly can transfer loads across time periods and reduce variation difference between heat and electric loads. These controllable loads can be regarded as “virtual energy storage system”. Managing the charging of EVs and heat storage of buildings, a joint virtual energy storage system including electric energy storage and thermal energy storage is proposed in this paper. Then, these models are integrated into a scheduling model for regional integrated energy system (RIES). The charging/discharging power management of joint virtual energy storage systems can be realized by arranging the charging of EVs based on vehicle-driven rules and by adjusting building indoor temperatures within the temperature comfort range. Finally, simulations are carried out to demonstrate the effectiveness of the scheduling method. Simulation results show that the RIES optimal scheduling model considering joint virtual energy storage can reduce operational costs. The stability of RIES is improved with the combination of virtual electrical and thermal energy storage.
Highlights
Adequate energy supply plays an important role in the process of social development
The energy field proposes the concept of the ‘‘energy internet’’, which uses energy cogeneration equipment, conversion equipment and storage equipment to realize the joint operation of gas, The associate editor coordinating the review of this manuscript and approving it for publication was Amjad Anvari-Moghaddam
By analyzing the theory of virtual energy storage and taking summer scenarios of an industrial park as an example, a virtual electrical energy storage and virtual thermal energy storage system is constructed with electric vehicles (EVs) charging stations and buildings
Summary
Adequate energy supply plays an important role in the process of social development. With low efficiency and high emission, the traditional energy system results in waste of energy and environmental pollution [1]. X. Zhu et al.: Optimal Scheduling Method for an RIES Considering Joint Virtual Energy Storage economic and low-carbon operation of energy systems. Energy storage equipment, which plays an important role in RIESs, assists energy systems in utilizing renewable energy and cheap electricity It promotes the economic and stable operation of the system by transferring loads across time periods. VOLUME 7, 2019 on adjusting air conditioning loads (ACLs) or charging load of EVs to achieve economic performance This single virtual energy storage mode may destroy the trend balance between the electrical and heat loads, which is not conducive to the stable operation of multi-energy systems. The temperature comfort level and charging demand of various EVs are added to the constraints of the model to optimize the charging/discharging states of the virtual energy storage, reduce the RIESs operational costs and improve the stability of the RIES. The characteristics and causes of energy charging/discharging of the joint virtual energy storage system are analyzed
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