分布式能源集成供能系统研究

发布时间：2018-04-03 02:02

本文选题：分布式能源集成供能系统　切入点：机组优化配置　出处：《华北电力大学(北京)》2017年硕士论文

【摘要】：随着分布式能源系统的快速发展,电网网损显著增加。分布式能源集成供能系统能有效联合新型能源,实现能量梯级利用,可以减小损耗、显著提高能源利用率,同时还可以大幅减少污染物排放。因此,分布式能源集成供能系统的合理配置、运行调度策略的优化以及综合评估对解决当前形势下的能源与环境问题具有重要意义。分布式能源集成供能系统采用独立供给、单向从电网购电或与电网进行双向交易三种不同的设计策略时,系统容量设计方案亦不同。然后将系统初期建设成本折算为系统年度固定成本,并与包含运行维护的可变成本共同构成系统的年度综合成本函数。最后以年供能收益与年综合成本的差额最大作为目标函数,优化系统各机组容量。考虑到用户电、冷、热的日负荷曲线差异较大,电负荷变化随机性强且电能难以大量储存,因此系统内电功率必须保持实时平衡;但冷、热负荷变化的过程一般存在一定的滞后性,因此为用户供应冷、热能时只需保证阶段内总供需平衡即可。立足工程实际,本文建立了电能实时平衡、冷(热)能分阶段平衡的分布式能源集成供能系统的优化运行模型,定量比较各个运行方案的优劣。最后,本文提出一种合作博弈赋权的物元-可拓法,并在此基础上,把上述的电力节能影响因子量化形成了电力节能评估指标,建立相应的系统电力节能评估体系和评估模型。本文提出的系统电力节能综合评估方法,综合考虑了荷-网-源三方面的影响,对系统的电力节能效果进行量化,为调度运行人员制定节能计划给予参考,也对提高电力节能水平具有重要意义。
[Abstract]:With the rapid development of distributed energy system, network loss increases significantly.Distributed energy integrated energy supply system can effectively combine new energy, realize energy cascade utilization, reduce energy loss, significantly improve energy efficiency, but also significantly reduce pollutant emissions.Therefore, the reasonable configuration of distributed energy integrated energy supply system, the optimization of operation scheduling strategy and the comprehensive evaluation are of great significance to solve the energy and environment problems in the current situation.When the distributed integrated energy supply system adopts three different design strategies: independent supply, one-way purchase of electricity from the power grid or two-way transaction with the power grid, the system capacity design scheme is also different.Then the initial construction cost of the system is converted into the annual fixed cost of the system, and the annual comprehensive cost function of the system is constructed together with the variable cost including operation and maintenance.Finally, the maximum difference between the annual energy supply income and the annual comprehensive cost is taken as the objective function to optimize the unit capacity of the system.Considering that the daily load curves of the user's electricity, cold and heat vary greatly, the change of electric load is strong and the electric energy is difficult to store in large quantities, so the electric power in the system must be kept in real time balance; but cold,The process of heat load change generally has some lag, so it is necessary to ensure the balance of total supply and demand in the process of supplying cold and heat energy to the user.Based on the engineering practice, this paper establishes the optimal operation model of distributed integrated energy supply system with real-time balance of electric energy and phased balance of cold (thermal) energy, and quantitatively compares the merits and demerits of each operation scheme.Finally, this paper proposes a matter-extension method with cooperative game weighting, and on this basis, quantifies the above factors to form the power energy conservation evaluation index, and establishes the corresponding system power energy conservation evaluation system and evaluation model.In this paper, the comprehensive evaluation method of system electric energy conservation is put forward, which considers the influence of charge, network and source, quantifies the effect of energy saving of the system, and provides a reference for dispatching operators to draw up energy saving plan.It is also of great significance to improve the level of electric energy saving.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TK01;TM61;TM73

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