Two-stage collaborative global optimization design model of the CHPG microgrid

[摘要] With the continuous developing of technology and reducing of investment costs, renewable energy proportion in the power grid is becoming higher and higher because of the clean and environmental characteristics, which may need more larger-capacity energy storage devices, increasing the cost. A two-stage collaborative global optimization design model of the combined-heat-power-and-gas (abbreviated as CHPG) microgrid is proposed in this paper, to minimize the cost by using virtual storage without extending the existing storage system. P2G technology is used as virtual multi-energy storage in CHPG, which can coordinate the operation of electric energy network and natural gas network at the same time. Demand response is also one kind of good virtual storage, including economic guide for the DGs and heat pumps in demand side and priority scheduling of controllable loads. Two kinds of storage will coordinate to smooth the high-frequency fluctuations and low-frequency fluctuations of renewable energy respectively, and achieve a lower-cost operation scheme simultaneously. Finally, the feasibility and superiority of proposed design model is proved in a simulation of a CHPG microgrid.

[发布机构] School of Electrical Engineering, Wuhan University, Wuhan, China^1

[效力级别] 机械制造 [学科分类] 航空航天科学

[关键词] Controllable loads;Environmental characteristic;High frequency fluctuations;Low Frequency Fluctuations;Natural gas networks;Optimization design;Priority scheduling;Renewable energies