Value of integrated electricity and heat scheduling with considering TSO–DSO cooperation

Habibi, Mahdi; Vahidinasab, Vahid; Sepasian, Mohammad Sadegh

Abstract

The active role of distribution system operators (DSOs) coordinated with the transmission system operator (TSO) is highlighted by increasing the competition of new parties in energy markets. Besides, combined heat and power (CHP) units are the primary heat supplier in district heating systems, and their electricity production is strongly coupled with heat productions. This paper evaluates an integrated model for scheduling electricity and heat with considering TSO–DSO cooperation to increase the operating efficiency in the day-ahead horizon. Also, this paper considers the cooperation of the electrical TSO, electrical DSOs, and district heating systems’ operators. The proposed model facilitates energy transactions between systems by considering intermediary variables. The share of each market party is calculated using intermediary variables and locational marginal
prices of electrical and heating systems, and the values are compared to the cases with the isolated operating of energy systems. Also, the model considers thermal energy storage systems (TESs) and the heat transaction capability between neighbor systems, and the feasible convex region is used for the operation of CHP units. The DC power flow equations are used at the transmission level, while the AC power flow is used for distribution grids. The AC power flow equations are relaxed into the second-order cone programming (SOCP) formulation,
which results in a mixed-integer second-order cone programming (MISOCP) problem. The proposed model is applied to the modified IEEE 24-bus test system, which contains electrical and heating systems at the distribution level. The result shows that the proposed model successfully reduces the operational costs and energy prices compared to the isolated scheduling of energy systems. Also, the model facilitates energy trading between market parties.

• Journal Article Type: Article
• Acceptance Date: Aug 15, 2021
• Publication Date: 2022-02
• Deposit Date: Feb 23, 2025
• Journal: International Journal of Electrical Power & Energy Systems
• Print ISSN: 0142-0615
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 135
• Pages: 107526
• DOI: https://doi.org/10.1016/j.ijepes.2021.107526
• Additional Information: This article is maintained by: Elsevier; Article Title: Value of integrated electricity and heat scheduling with considering TSO–DSO cooperation; Journal Title: International Journal of Electrical Power & Energy Systems; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.ijepes.2021.107526; Content Type: article; Copyright: © 2021 Elsevier Ltd. All rights reserved.