Day-Ahead Optimal Economic Dispatching Strategy for Micro Energy-Grid with P2G
Liu Zhijian1, Liu Ruiguang1, Liang Ning1, Liu Xiaoxin2
1. Faculty of Electric Power Engineering Kunming University of Science and Technology Kunming 650500 China; 2. Yunnan Power Grid Corporation Limited Lushui 673199 China
Abstract The micro energy-grid with multiple energy conversion equipment could improve the local accommodation rate of renewable energy resources by mutual conversion between different energy sources. In view of that, this paper proposed a day-ahead optimized scheduling strategy for micro energy grid that containing Power to Gas (P2G). Firstly, based on the research of micro energy-grid dispatching with P2G and gas-storage equipment, the influence mechanism it imposes on the grid economic operation and renewable energy accommodation was revealed. Then, the electrical coupling mechanism between micro turbine and P2G was studied, and a micro energy-grid model that combines electricity, gas, heat and cold power together was established by means of energy hub. Based on this model, the relationship between energy supply, conversion, and consumption was investigated through energy conversion matrix. Finally, by considering the benefits of P2G, a day-ahead optimal scheduling model with the goal of minimizing total operation cost was established and verified by establishing a comparison method. Simulation results demonstrate that proposed strategy plays a positive role in both system operating cost reduction and renewable energy accommodation enhancement.
Liu Zhijian,Liu Ruiguang,Liang Ning等. Day-Ahead Optimal Economic Dispatching Strategy for Micro Energy-Grid with P2G[J]. Transactions of China Electrotechnical Society, 2020, 35(zk2): 535-543.
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2020, Vol. 35 
