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A novel dynamic temperature reset strategy for enhancing flexibility of district heating systems under supply-demand mismatch state

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  • Cao, Shanshan
  • Guo, Zhaowei
  • Sun, Chunhua
  • Xia, Guoqiang
  • Qi, Chengying
  • Wu, Xiangdong

Abstract

District heating systems (DHSs) are increasingly integrating renewable energy and demand-side management, while rigid operation modes struggle to handle supply-demand fluctuations. This paper proposes a dynamic temperature reset regulation strategy integrating thermal characteristics and load aggregation to address supply-demand mismatch. Firstly, thermal response time of DHSs is identified and applied to diagnose supply-demand states. Then, buildings' comprehensive thermal characteristics coefficient (R) is introduced as a similarity indicator to aggregate substations. Finally, differentiated temperature reset strategy is applied to each type of substation according to R value, making full use of buildings' thermal storage capacity. The proposed method is applied to practical DHSs. Results showed that the diagnostic accuracy of supply-demand mismatch rate increased by 46.30%. The 87 substations were aggregated into 7 types with R values ranging from 0.44 to 1.27. Differentiated regulation achieved 4.41% energy savings, and system balance degrees were maintained within 0.95∼1.05.

Suggested Citation

  • Cao, Shanshan & Guo, Zhaowei & Sun, Chunhua & Xia, Guoqiang & Qi, Chengying & Wu, Xiangdong, 2026. "A novel dynamic temperature reset strategy for enhancing flexibility of district heating systems under supply-demand mismatch state," Energy, Elsevier, vol. 348(C).
    • Handle: RePEc:eee:energy:v:348:y:2026:i:c:s0360544226005487
    DOI: 10.1016/j.energy.2026.140445
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