华北电力大学电气与电子工程学院, 北京市 102206
School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China
The power to gas(P2G)technology has improved the operational flexibility of multi-energy system. In this background, the optimal configuration model of electric/thermal integrated energy storage for combined heat and power microgrid including P2G device is developed and the configuration methods of rated capacity and power for electric/thermal energy storage system are proposed, which is based on the fact that the research on the optimization of configuration for electric/thermal integrated energy storage in integrated energy systems is currently insufficient. Firstly, considering the electric energy substitution on the user side, the load curve is revised based on the random ‘replace heat with electricity' load model. Secondly, the bi-level optimization model is established considering the multi-objective of cost, power supply reliability and acceptance rate of new energy, while the loss of battery life is also considered. The outer layer is optimized for configuration, and the inner layer is optimized for operation. The inner model is transfered to the additional constraint of the outer model by the Karush-Kuhn-Tucker(KKT)approach of inner model, and the bi-level model is transformed into a single-level model, which is solved with Gurobi solver. Finally, the correctness of the proposed model is verified by an example, and the influence of the P2G technology on the optimal configuration of energy storage system is analyzed.
ZHAO Dongmei, XIA Xuan,TAO Ran.Optimal Configuration of Electric/Thermal Integrated Energy Storage for Combined Heat and Power Microgrid with Power to Gas[J].Automation of Electric Power Systems,2019,43(17):46-54. DOI:10.7500/AEPS20190126001.