A Water Mass Method and Its Application to Integrated Heat and Electricity Dispatch Considering Thermal Dynamics

Currently, most district heating networks are running in a heat-setting mode, limiting the adjustment of the electrical power of combined heat and power (CHP) units. By considering the electrical power system (EPS) and district heating system (DHS) together, the peak regulatory capability of CHP uni...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Chen, Yuwei, Guo, Qinglai, Sun, Hongbin, Li, Zhengshuo, Pan, Zhaoguang, Wu, Wenchuan
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 20.12.2017
Subjects
Benders decomposition
Cogeneration
District heating
Dynamic characteristics
Electric power systems
Electricity
Iterative algorithms
Iterative methods
Optimization models
Power dispatch
Steady state models
Thermal simulation
Water masses
Online AccessGet full text

Cover

More Information
Summary:Currently, most district heating networks are running in a heat-setting mode, limiting the adjustment of the electrical power of combined heat and power (CHP) units. By considering the electrical power system (EPS) and district heating system (DHS) together, the peak regulatory capability of CHP units can be improved and renewable energy accommodation can be promoted. In this paper, a tractable integrated heat and electricity dispatch (IHED) model is described that addresses the thermal dynamic characteristics of pipelines and buildings to increase flexibility. To deal with the complexity of the optimization model, a water mass method (WMM) for pipeline thermal dynamics is proposed. Benefiting from the WMM, the proposed IHED model is an ordinary, non-linear model. An iterative algorithm based on the generalized Benders decomposition, and a sequential approach combined with the iterative algorithm and IPOPT, are proposed to solve the IHED model. Compared with a steady state model without thermal dynamics, considering the thermal dynamic characteristics in the DHS can further expand the peak regulatory capabilities of CHP units. The WMM is tested in the thermal dynamic simulations compared to an existing node method and a commercial simulation software. And the proposed solution strategy is verified in a small-scale system and a practical system. The simulation results of case studies are discussed to demonstrate the feasibility and economy of the dispatch model proposed here.
ISSN:2331-8422