配电网中分布式电源的选址定容规划

发布时间：2018-05-17 12:34

本文选题：分布式电源 + 最优接入　；参考：《天津大学》2014年硕士论文

【摘要】：近年来,随着能源和环境问题的日益突出,以及分布式电源发电技术的日趋成熟,越来越多的分布式电源接入配电网,将使配电网结构和运行控制方式发生巨大的改变,为此,深入研究分布式电源接入配电网时合理的接入位置和恰当的接入容量至关重要。已有的研究存在以下两方面的问题:1)已有研究所建立的规划模型未能协同考虑分布式电源对配电网可靠性、网络损耗、单位负荷供电成本与配电网售电收益的影响,对分布式电源接入后对配电网经济效益的影响考虑得不够充分;2)目前大多研究对分布式电源的规划多采用确定性方法,不能计及到不同时刻风机与光伏发电具有不同的随机特性,不能协同考虑分布式电源出力与负荷的时序特性与随机特性。本文提出了一种新的配电网选址定容规划方法。首先,分析风速、光照强度以及负荷的时序特性和随机特性,将基于半不变量法的随机潮流计算方法与典型场景法相结合来解决目标函数中售电收益需要时序计算的问题;然后,分析分布式电源接入后对配电网经济性的影响,基于置信容量的思想,将配电网可靠性提升转换成为单位负荷供电成本的降低,并结合DG对配电网售电收益、网络损耗等方面影响的综合分析,构建以电网单位收益年费用最小作为目标函数的规划模型;之后,本文给出了配电网中DG选址定容规划的具体求解方法,采用考虑时序特性的概率潮流计算嵌入到粒子群算法中的方法对所建立的模型进行优化求解,利用惩罚函数处理约束条件,将优化得到的最优解作为最终规划方案;最后,通过算例分析展示了本文所提方法的具体应用,验证了该方法的有效性和准确性。
[Abstract]:In recent years, with the increasingly prominent energy and environment problems, and the growing maturity of distributed power generation technology, more and more distributed power supply access to distribution network will make the distribution network structure and operation control mode change greatly. Therefore, the reasonable access position and appropriate distribution network access distribution network is studied. The access capacity is very important. There are two problems in the existing research: 1) the planning model established by the existing research institute fails to take into account the influence of distributed power on distribution network reliability, network loss, unit load power supply cost and distribution net income of distribution network, and the influence of distributed power supply on the economic benefit of distribution network after the distribution type power supply is connected. There is not enough consideration; 2) at present, most of the research on the planning of distributed power supply is mostly determined by the deterministic method, which can not account for the different random characteristics of the wind turbine and the photovoltaic power generation at different time, and can not take into account the timing and random characteristics of the distributed power supply and load. A new distribution network location setting regulation is proposed in this paper. First, we analyze the wind speed, the intensity of illumination, the time series and the random characteristics of the load, and combine the stochastic flow calculation method based on the semi invariants method and the typical scene method to solve the problem of the time series calculation of the electricity sale income in the target function, and then analyze the influence of the distribution power supply on the distribution network economy after the distribution of the distribution power supply. In the thought of confidence capacity, the reliability promotion of distribution network is converted to the reduction of power supply cost per unit load. Combined with the comprehensive analysis of the effects of DG on distribution net income and network loss, the planning model of the minimum annual cost of power grid is constructed as the goal function of the power grid. After that, this paper gives the location of DG in the distribution network. In the concrete solution method of capacity planning, the method of probabilistic power flow calculation considering time series characteristics is embedded into the particle swarm optimization algorithm to optimize the solution of the model, and the optimal solution is obtained by using the penalty function to deal with the constraint conditions. Finally, a numerical example is made to show the method proposed in this paper. The effectiveness and accuracy of the method are verified by application.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM715

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