自治微电网柔性电源规划研究

发布时间：2018-10-05 18:28

【摘要】：可再生能源的利用被广泛认为是解决当前全球能源问题的有效手段。作为可再生能源利用的重要方式,微电网中的分布式电源以及储能设备的容量优化配置问题值得重点研究。各类储能元件在功率密度、能量密度、响应速度(时间)及寿命周期等特性上具有较大差异;此外,不同类型和重要等级的负荷对供电可靠性的要求也各不相同,因而综合考虑电源配合机理以及源-荷协调的电源容量优化配置方法将极大地提高规划方案的合理性。本文重点研究了自治微电网中的电源容量优化问题,通过归纳和对比各类型电源的主要特性,分析得出了电源配合机理,在此基础上提出了配置的基本原则,并提出了一种用于平衡规划方案经济性和可靠性的“额外补偿率(4CR)”指标,将其应用于配置原则,形成了综合考虑负荷特性的自治微电网源-荷协调配置策略。基于全寿命周期理论,建立了全面考虑经济性,可靠性和环保性的目标函数,并通过算例分析对提出的策略和建立的模型进行验证。对某自治微电网规划实例运用鸡群算法(CSO)进行优化计算,对计算结果进行了分析,并与经典PSO算法的计算结果进行了对比。本文提出的协调配置策略可以实现微电网电源容量配置方案在经济性和可靠性之间的博弈与合理取舍,分析得出的ACR指标与最优规划方案成本之间的关系可为微电网规划决策者在面对不同场景下、不同可靠性和经济性要求下的规划方案选取提供参考。
[Abstract]:The use of renewable energy is widely regarded as an effective means to solve the current global energy problems. As an important way of renewable energy utilization, the problem of distributed power generation and capacity optimization of energy storage equipment in microgrid deserves to be studied. There are great differences in power density, energy density, response speed (time) and life cycle of all kinds of energy storage elements. In addition, different types and important classes of loads require different reliability of power supply. Therefore, the rationality of the planning scheme will be greatly improved by considering the mechanism of power supply coordination and the optimal allocation of power supply capacity based on source-load coordination. This paper focuses on the optimization of power supply capacity in autonomous microgrid. By summarizing and comparing the main characteristics of various types of power supply, the mechanism of power supply coordination is analyzed and the basic principles of configuration are put forward. An "extra compensation rate (4CR)" index for the economy and reliability of the balanced planning scheme is proposed, which is applied to the allocation principle and forms a coordinated source-load allocation strategy for autonomous micro-power networks considering the load characteristics. Based on the life-cycle theory, an objective function considering economy, reliability and environmental protection is established, and the proposed strategy and the established model are verified by an example. The chicken swarm optimization algorithm (CSO) is used to optimize a certain autonomous microgrid planning example. The calculation results are analyzed and compared with those of the classical PSO algorithm. The coordinated configuration strategy proposed in this paper can realize the game and reasonable choice between economy and reliability of the configuration scheme of power supply capacity in microgrid. The relationship between the ACR index and the cost of the optimal planning scheme can be used as a reference for the decision makers of microgrid planning under different scenarios and different reliability and economic requirements.
【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】：TM715

【参考文献】