计及自然灾害与电动汽车接入的电力网络规划及发展需求评估
发布时间：2018-12-23 10:50
【摘要】：随着间歇性可再生能源的渗透、电动汽车等灵活性负荷的出现以及智能电网的快速发展,电力系统各个环节涉及的不确定因素逐渐增多。为降低这些不确定因素的影响以充分保证未来电力系统运行的安全性和经济性,需要在电力系统规划阶段就考虑各种不确定因素的影响。目前,在输电网络规划中,大多考虑系统内部的不确定因素,同时计及外部自然灾害因素风险的相关研究较少,而实际上自然灾害风险对电力系统的影响很大;在配电系统侧,电动汽车负荷的接入和可调控负荷是影响配电网络规划、安全运行的重要因素,如何在配电网络规划中合理计及充电负荷和需求侧响应资源,也是具有重要意义的课题。在此背景下,本文对相关问题进行了初步研究,主要做了以下几个方面的工作:(1)概述了电力系统规划中不确定因素建模、电力系统规划模型内容和求解方法。首先分类总结电力系统各环节出现的不确定因素以及相应的建模方法,其次梳理了电力系统规划模型的三部分要素,最后对模型求解方法分三类进行了概述。(2)发展了计及自然灾害风险的输电网络规划模型。首先,确定基于两类不确定因素的多场景规划思路和模型,而后对两类因素分别构建模拟运行场景集对规划方案进行安全校验和风险计算,采用粒子群优化算法结合分层优化思想对模型进行求解,最后采用修改的18节点系统算例说明在充分考虑自然灾害风险因素的情况下,可以在规划方案经济性与系统风险之间进行适当折中以获得综合较优方案。(3)提出了计及可平移负荷作用的充电网络与配电系统协同规划的模型。首先,介绍了两类充电设施定容方式和选址方法,其中采用P中位模型、将充电服务总成本作为快充站选址优化目标,而后介绍了可平移负荷模型,之后综合建立了配电系统与快充网络的协同规划模型。通过54节点系统算例表明了协同规划有利于提高综合经济效益,同时可平移负荷也有助于改善系统运行,间接减少配电系统建设投资。(4)提出了县域配电系统发展需求特征评估分析方法。首先提出了基于马斯洛理论的县域配电系统发展需求层次划分方法,将配电系统发展需求划分为五个发展层次,构建相应的发展需求特征指标集。之后采用表征县域配电系统不同方面发展需求的五个指标值进行聚类分析,对县域配电系统的发展需求进行分类评估。最后以实际算例表明,根据聚类中心矩阵得出了各大类县域的发展需求特点及相应的发展重点,为配电系统未来的规划、建设决策提供参考。最后对论文中所作的研究进行简要总结,并指出了该领域有待进一步研究的问题。
[Abstract]:With the penetration of intermittent renewable energy, the emergence of flexible loads such as electric vehicles and the rapid development of smart grids, the uncertainties involved in each link of power system are gradually increasing. In order to reduce the influence of these uncertain factors to ensure the safety and economy of power system operation in the future, it is necessary to consider the influence of various uncertain factors in the power system planning stage. At present, in the transmission network planning, most of the uncertain factors within the system are considered, and there are few related studies considering the risk of external natural disasters, but in fact, the impact of natural disaster risk on the power system is very large. On the power distribution system side, the load access and adjustable load of electric vehicle is an important factor affecting the distribution network planning and safe operation. How to reasonably consider the charge load and the demand side response resources in the distribution network planning? It is also a subject of great significance. Under this background, this paper has carried on the preliminary research to the related question, mainly has done the following several aspects work: (1) has summarized the power system planning in the uncertain factor modelling, the power system planning model content and the solution method. Firstly, the paper classifies and summarizes the uncertain factors in each link of power system and the corresponding modeling methods, and then combs the three elements of the power system planning model. Finally, the methods for solving the model are summarized. (2) the transmission network planning model considering the risk of natural disasters is developed. Firstly, the idea and model of multi-scene planning based on two kinds of uncertain factors are determined, and then the simulated running scenario set is constructed to calculate the security and risk of the planning scheme. Particle swarm optimization (PSO) algorithm combined with hierarchical optimization is used to solve the model. Finally, a modified 18-node system example is used to show that the risk factors of natural disasters are fully taken into account. A suitable compromise can be made between the economy of the planning scheme and the system risk in order to obtain a comprehensive optimal scheme. (3) A model of collaborative planning between the charging network and the distribution system considering the translatable load is proposed. Firstly, two types of charging facilities are introduced, including the P-median model, the total cost of charging service as the optimization target of the fast charging station location, and the translatable load model. Then the cooperative programming model of distribution system and fast charge network is established. The example of 54 node system shows that cooperative planning is beneficial to improve the comprehensive economic benefit, and the transportable load is also helpful to improve the operation of the system. Indirect reduction of investment in distribution system construction. (4) A method for evaluation and analysis of development demand characteristics of county distribution system is proposed. In this paper, a method based on Maslow theory is put forward to divide the development demand level of the county distribution system into five levels, and the corresponding characteristic index set of the development demand is constructed. Then cluster analysis is carried out by using five index values which represent the development needs of different aspects of the county distribution system, and the development needs of the county distribution system are classified and evaluated. Finally, a practical example shows that, according to the cluster center matrix, the characteristics of the development needs and the corresponding development emphases of each kind of county area are obtained, which provides a reference for the future planning and construction decision of the distribution system. Finally, the research in this paper is summarized briefly, and the problems in this field are pointed out.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM715
[Abstract]:With the penetration of intermittent renewable energy, the emergence of flexible loads such as electric vehicles and the rapid development of smart grids, the uncertainties involved in each link of power system are gradually increasing. In order to reduce the influence of these uncertain factors to ensure the safety and economy of power system operation in the future, it is necessary to consider the influence of various uncertain factors in the power system planning stage. At present, in the transmission network planning, most of the uncertain factors within the system are considered, and there are few related studies considering the risk of external natural disasters, but in fact, the impact of natural disaster risk on the power system is very large. On the power distribution system side, the load access and adjustable load of electric vehicle is an important factor affecting the distribution network planning and safe operation. How to reasonably consider the charge load and the demand side response resources in the distribution network planning? It is also a subject of great significance. Under this background, this paper has carried on the preliminary research to the related question, mainly has done the following several aspects work: (1) has summarized the power system planning in the uncertain factor modelling, the power system planning model content and the solution method. Firstly, the paper classifies and summarizes the uncertain factors in each link of power system and the corresponding modeling methods, and then combs the three elements of the power system planning model. Finally, the methods for solving the model are summarized. (2) the transmission network planning model considering the risk of natural disasters is developed. Firstly, the idea and model of multi-scene planning based on two kinds of uncertain factors are determined, and then the simulated running scenario set is constructed to calculate the security and risk of the planning scheme. Particle swarm optimization (PSO) algorithm combined with hierarchical optimization is used to solve the model. Finally, a modified 18-node system example is used to show that the risk factors of natural disasters are fully taken into account. A suitable compromise can be made between the economy of the planning scheme and the system risk in order to obtain a comprehensive optimal scheme. (3) A model of collaborative planning between the charging network and the distribution system considering the translatable load is proposed. Firstly, two types of charging facilities are introduced, including the P-median model, the total cost of charging service as the optimization target of the fast charging station location, and the translatable load model. Then the cooperative programming model of distribution system and fast charge network is established. The example of 54 node system shows that cooperative planning is beneficial to improve the comprehensive economic benefit, and the transportable load is also helpful to improve the operation of the system. Indirect reduction of investment in distribution system construction. (4) A method for evaluation and analysis of development demand characteristics of county distribution system is proposed. In this paper, a method based on Maslow theory is put forward to divide the development demand level of the county distribution system into five levels, and the corresponding characteristic index set of the development demand is constructed. Then cluster analysis is carried out by using five index values which represent the development needs of different aspects of the county distribution system, and the development needs of the county distribution system are classified and evaluated. Finally, a practical example shows that, according to the cluster center matrix, the characteristics of the development needs and the corresponding development emphases of each kind of county area are obtained, which provides a reference for the future planning and construction decision of the distribution system. Finally, the research in this paper is summarized briefly, and the problems in this field are pointed out.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM715
【参考文献】
相关期刊论文 前10条
1 程耀华;张宁;康重庆;孟s，
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