Coordinated Scheduling and Operational Characterization of Electricity and District Heating Systems: A Case Study

Peng Yu, Dianyang Li, Dai Cui, Jing Xu, Chengcheng Li and Huiqing Cao ()
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Peng Yu: State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang 110004, China
Dianyang Li: State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang 110004, China
Dai Cui: State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang 110004, China
Jing Xu: State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang 110004, China
Chengcheng Li: State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang 110004, China
Huiqing Cao: Department of Thermal Engineering, Tsinghua University, Beijing 100084, China

Energies, 2025, vol. 18, issue 9, 1-17

Abstract: With the increasing penetration of renewable energy generation in energy systems, power and district heating systems (PHSs) continue to encounter challenges with wind and solar curtailment during scheduling. Further integration of renewable energy generation can be achieved by exploring the flexibility of existing systems. Therefore, this study systematically explores the deep transfer modifications of a specific thermal power plant based in Liaoning, China, and the operational characteristics of the heating supply system of a particular heating company. In addition, the overall PHS operational performance is analyzed. The results indicate that both absorption heat pumps and solid-state electric thermal storage technologies effectively improve system load regulation capabilities. The temperature decrease in the water medium in the primary network was proportional to the pipeline distance. When the pipeline lengths were 1175 and 14,665 m, the temperature decreased by 0.66 and 3.48 °C, respectively. The heat exchanger effectiveness and logarithmic mean temperature difference (LMTD) were positively correlated with the outdoor temperature. When the outdoor temperature dropped to −18 °C, the heat exchanger efficiency decreased to 60%, and the LMTD decreased to 17.5 °C. The study findings provide practical data analysis support to address the balance between power supply and heating demand.

Keywords: electricity and district heating systems; actual operational heating data; absorption heat pumps; solid-state electric thermal storage (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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