园区综合能源系统(Park-level Integrated Energy System,PIES)供能设备多样,能源耦合机制复杂,是典型的复杂能源系统.为实现PIES低碳经济运行并提升风电消纳量以及解决系统因用能结构不合理导致的能源利用效率偏低问题,文中建立了电热需求响应模型优化负荷,并充分考量能量的"质"与"量",基于热力学第一、第二定律建立了对系统碳排放约束性较强的综合能效模型,并将系统的热负荷根据能源品位进行细化区分,依据热能梯级利用理论,建立了能量耦合设备的数学模型.最后结合系统经济成本目标及系统综合能效目标建立了园区综合能源系统多目标优化调度模型,实现针对系统内各设备出力的调度.算例分析表明,文中提出的优化调度方案能够在提升系统风电消纳率及运行经济性的同时兼顾系统的低碳高效运行.
Optimal Dispatch of Wind-photovoltaic-Thermal-Storage Combined System Considering Minimum Inertia Constraints
PIES is a typical complex energy system with complex energy supply equipment and diversified energy coupling mechanism.In order to realize the low-carbon economic operation of PIES,increase the consumption of wind power and solve the problem of low energy utilization efficiency caused by the unreasonable energy use structure of the system,the paper established an electric heating demand response model,fully considering the"quality"and"quantity"of energy,and established a comprehensive energy efficiency model with strong constraint on the carbon emission of the system based on the first and second laws of thermodynamics.According to the principle of cascade utilization,a cascade utilization model containing multiple energy coupling devices is established.Finally,a multi-objective optimization scheduling model of the integrated energy system of the park is established based on the economic cost objective of the system and the comprehensive energy efficiency objective of the system,and the output scheduling of each equipment in the system is realized.The example analysis shows that the optimized scheduling scheme proposed in this paper can not only improve the system's wind power consumption rate and operation economy,but also take into account the low carbon and efficient operation of the system.
PIESstep utilizationdemand responsemulti-objective optimal schedulingcomprehensive energy efficiencywind Power consumption
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