Combined Heat and Power Dispatch Considering Pipeline Energy Storage of District Heating Network

• Published in: IEEE transactions on sustainable energy Vol. 7; no. 1; pp. 12 - 22
• Main Authors: Li, Zhigang, Wu, Wenchuan, Shahidehpour, Mohammad, Wang, Jianhui, Zhang, Boming
• Format: Journal Article
• Language: English
• Published: IEEE 01.01.2016
• Subjects: Cogeneration; Combined heat and power; Combined heat and power dispatch (CHPD); District heating; district heating system (DHS); Dynamical systems; Dynamics; Energy storage; Heat pumps; Mathematical models; network-constrained economic dispatch; Networks; Pipelines; Resistance heating; Water heating; Wind power; Wind power generation; wind power integration; network-constrained economic dispatch; district heating system (DHS); energy storage; wind power integration; Combined heat and power dispatch (CHPD)
• ISSN: 1949-3029; 1949-3037
• DOI: 10.1109/TSTE.2015.2467383

The regional integration of variable wind power could be restricted by a strong coupling of electric power generation dispatch and heat supply of combined heat-and-power (CHP) units. The coupling in cold seasons precludes CHPs from providing the necessary flexibility for managing the wind power dispatch. The lack of flexibility problem can be tackled by exploiting the energy storage capability of a district heating network (DHN) which decouples the strong linkage of electric power and heat supplies. In this paper, a combined heat and power dispatch (CHPD) is formulated to coordinate the operation of electric power system (EPS) and district heating system (DHS). The proposed CHPD model which is solved by an iterative method considers the temperature dynamics of DHN for exploiting energy storage as an option for managing the variability of wind energy. The simulation results are discussed for several test systems to demonstrate the potential benefits of the proposed method in terms of operation economics, wind power utilization, as well as the potential benefits for real systems.