Optimal dispatching strategy of regional micro energy system with compressed air energy storage

The regional micro energy system (RMES) can meet users' multi-energy demand and realize the accommodation of renewable energy, which makes it a very promising energy utilization scheme. This paper presents a novel RMES structure with compressed air energy storage system (CAES) as the core energy storage component. Additionally, a bi-level optimal dispatching strategy for realizing the balance between supply and demand in regional micro energy system with compressed air energy storage system is proposed for the new scheme. The upper layer optimization calculates the optimal initial value of energy state of CAES in each energy supply cycle, and the lower layer optimizes the hourly operation strategy based on the thermoeconomic characteristics. An improved thermoeconomics method was introduced to reduce the dimensionality of the optimization model and increase the computational efficiency. The addition of parallel computing methods further accelerates the model calculation speed. Case studies demonstrate the effectiveness of the method. The proposed dispatching strategy based on thermoeconomics provides theoretical support for the application of CAES in multi-energy utilization scenarios, and provides a reference for the calculation of the revenue and payback period of the RMES. (C) 2020 Published by Elsevier Ltd.