Operation of coupled multi-owner district heating networks via distributed optimization

Valentin Kaisermayer, Daniel Muschick, Martin Horn, Markus Gölles*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The growth of district heating and cooling (DHC) networks introduces the possibility of connecting them with neighbouring networks. Coupling networks can save costs by reducing operating hours of peak load or backup boilers, or free up production capacity for network expansion. Optimization-based energy management systems (EMS) already provide operators of individual DHC networks with solutions to the unit commitment and economic dispatch problem. They are especially useful for complex networks with multiple producers and integrated renewable energy sources, where incorporating forecasts is important. Time-dependent constraints and network capacity limitations can easily be considered. For coupled networks, a centralized optimization would provide a minimum with respect to an objective function which can incorporate fuel costs, operational costs and costs for emissions. However, the individual coupled networks are generally owned by different organizations with competing objectives. The centralized solution might not be accepted, as each company aims to optimize its own objective. Additionally, all data has to be shared with a centralized EMS, and it represents a single point of failure. A decentralized EMS may therefore be a better choice in a multi-owner setting. In this article, a novel decentralized EMS is presented that can handle multi-owner structures with cooperative and non-cooperative coupling. Each local EMS solves its own optimization problem, and an iterative Jacobi-style algorithm ensures consensus among the networks. The distributed EMS is compared to a centralized EMS based on a representative real-world example consisting of three coupled district heating networks operated by two companies.
Original languageEnglish
Pages (from-to)273-281
Number of pages9
JournalEnergy Reports
Volume7
Issue numberSuppl. 4
DOIs
Publication statusPublished - Oct 2021
Event17th International Symposium on District Heating and Cooling: DHC 2021 - Nottingham Trent University, Nottingham, United Kingdom
Duration: 6 Sep 20219 Sep 2021
http://dhc2021.uk/

Keywords

  • District heating networks
  • Energy management system
  • Multi-owner
  • Cooperative
  • Non-cooperative

ASJC Scopus subject areas

  • Energy(all)

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