含P2G和混合电储能的矿山综合能源系统多目标优化调度

Multi-objective optimal dispatch of mining area integrated energy system with P2G and hybrid electric energy storage

为了提高分布式光伏消纳能力、优化矿山能源利用效率,提出一种基于电转气(P2G)技术和煤层气发电技术的光-储-气-废弃矿井抽蓄多能耦合矿山综合能源系统(MIES),该系统将弃光电量通过电解水制CH4作为煤层气发电的补充,并采用混合电储能平抑光伏出力波动。在对多能耦合MIES进行分析的基础上,构建矿山电、气、热、冷不同能源转换装置的数学模型,并以总运行成本和弃光电量最小为目标,建立MIES协调优化调度模型。不同运行场景下的调度结果表明,所提模型能实现协调调度,提高弃光电量的消纳,降低总运行成本。对不同储能模式下P2G和混合电储能装置之间互补协调能力的分析结果表明,所提模型能提升系统运行灵活性,实现能源最优经济利用。

In order to improve the consumption capacity of photovoltaic and optimize the energy utilization efficiency of mining area,a photovoltaic-energy storage-gas-abandoned mine pumped storage station multienergy coupling MIES(Mining area Integrated Energy System)based on P2 G(Power to Gas)technology and coal-bed methane power generation technology is proposed,which uses the abandoned photovoltaic energy to produce CH4 through electrolysis of water as the supplement of coal-bed methane power generation,and adopts hybrid electric energy storage to suppress the fluctuation of photovoltaic output.Based on the analysis of multi-energy coupling MIES,the mathematical models of different energy converting devices of electricity,gas,heat and cold in the mining area are established,and a coordinated optimal dispatch model of MIES is established with the minimum total operation cost and abandoned photovoltaic energy as its objectives.The dispatch results under different scenarios show that the proposed model can realize coordinated dispatch,improve the consumption of abandoned photovoltaic energy,and reduce the total operation cost.The analysis results of complementary coordination ability between P2 G and hybrid electric energy storage under different energy storage modes show that the proposed model can improve operation flexibility of the system and realize optimal economic utilization of energy.