Electric Power ›› 2025, Vol. 58 ›› Issue (4): 1-12.DOI: 10.11930/j.issn.1004-9649.202408095

• Key Technologies of Local Energy System Operation Under Electric-Carbon Coordination • Previous Articles     Next Articles

Research on Optimal Dispatch with Source-Load Coordination for Micro-energy Grid Based on Energy-Carbon Coupling Model

XU Shijie1,2(), HU Bangjie1,2, ZHAO Liang3, WANG Pei1,2()   

  1. 1. School of Renewable Energy, Hohai University, Nanjing 210098, China
    2. Engineering Research Center of Renewable Power Generation Technologies, Ministry of Education, Nanjing 210098, China
    3. China Southern Power Grid Digital Grid Research Institute Co., Ltd., Guangzhou 510700, China
  • Received:2024-08-28 Accepted:2024-11-26 Online:2025-04-23 Published:2025-04-28
  • Supported by:
    This work is supported by Joint Key Project of National Natural Science Foundation of China (Cycle Mechanism and Optimal Control of Hydro-Hydrogen-Electric Hybrid Energy Storage in the Upper Yellow River, No.U2243243).

Abstract:

At present, the low-carbon dispatch of the integrated energy system focuses on the means of carbon reduction at the source side, while ignoring the low-carbon potential of the load side and the ability of carbon reduction for source-load coordination. Taking the micro energy grid coupled with power, heat and gas as the research object, an optimal dispatch method with source-load coordination of heterogeneous energy flow system based on energy-carbon coupling model is proposed, and a two-stage optimal dispatch framework of day-ahead and intra-day based on the process of source-load coordination is built. In the source side, the combined heat and power (CHP) units with adjustable heat-to-power ratio coupling with power-to-heat equipment are used for energy supply, and the dynamic carbon emission characteristic of each unit in the energy station is considered; In the grid side, the energy-carbon coupling model of power and heat energy is established by using the carbon emission flow theory, and the obtained distribution of carbon intensity is transferred to the load side; Based on this carbon information and considering the impact of time-sharing energy price, the load side guides the load to adjust behaviors of energy consumption in real time to respond to low-carbon demand, and feeds back the updated load to the source side to re-optimize the output of each unit, so as to realize the process of source-load coordination. The effectiveness of the proposed method is verified by analyzing the micro energy grid composed of the improved IEEE 33-node power grid and the Barry Island 32-node heat grid.

Key words: energy-carbon coupling model, micro-energy grid, source-load coordination, optimal dispatch, adjustable heat-to-power ratio, dynamic carbon emission characteristic, low-carbon demand response