含分布式电源的配电网静态电压稳定性研究

发布时间：2018-04-20 13:51

本文选题：分布式电源 + 静态电压稳定性　；参考：《华北电力大学》2014年硕士论文

【摘要】：近年来,面对化石能源的日益枯竭及其对环境的影响,开发清洁的可再生能源成为发展需要,这促使分布式发电技术成为现代电力系统发展的趋势之一。但同时,分布式电源的引入改变了现行配电网的结构,必然会对系统的稳定运行产生一系列不可避免的影响。因此,研究分布式电源并网对配电网的影响十分必要,对电压稳定性的研究尤为重要。本文首先介绍了几种常见的分布式电源,以及分布式电源并网后对配电网电压稳定性影响的研究背景和发展现状。对含分布式电源配电网的静态电压稳定进行分析,根据分布式电源的工作原理、运行方式,建立了不同分布式电源、配电网和负荷的稳态模型,并将分布式电源划分为PQ、P-Q(V)、PI、PV四种节点类型,给出了分布式电源接入下配电网潮流计算模型在潮流计算中的处理方法。其次以静态电压稳定性分析的理论为基础,构建了一种基于潮流解存在性的静态电压稳定性指标。在MATLAB仿真环境下,分别建立了风力发电机组和光伏发电系统模型,通过IEEE33节点算例进行基于关联矩阵自乘的前推回代潮流计算,实现了对指标的求解并对其有效性进行仿真验证。最后,在指标求解的基础上,分别从分布式电源的并网容量、并网位置、功率因数,以及分布式电源类型出发,研究不同分布式电源接入后对配电系统静态电压稳定性的影响,分析总结规律,并找出了系统中的电压敏感节点。
[Abstract]:In recent years, in the face of the increasing depletion of fossil energy and its impact on the environment, the development of clean renewable energy has become a development requirement, which makes the distributed generation technology become one of the trends of modern power system development. At the same time, the introduction of distributed power supply has changed the structure of the current distribution network, and will inevitably run the stable operation of the system. Therefore, it is necessary to study the influence of distributed generation interconnection on distribution network, and the study of voltage stability is particularly important.
This paper first introduces several common distributed power sources, and the research background and development status of the distribution network voltage stability after the distributed power grid connected to the network. The static voltage stability of distribution network with distributed power supply is analyzed. According to the working principle and operation mode of distributed power supply, different distributed power supply and distribution are established. The network and load steady state model, and divide the distributed power into four kinds of node types: PQ, P-Q (V), PI, PV, and the processing method of power flow calculation model in distribution network is given in the distribution network.
Secondly, based on the theory of static voltage stability analysis, a static voltage stability index based on the existence of power flow solution is constructed. In the MATLAB simulation environment, the model of wind turbine and photovoltaic power generation system is set up respectively. The calculation of the forward back generation power flow based on the correlation matrix self multiplying is carried out by the IEEE33 node example. The index is solved and its validity is verified by simulation.
Finally, on the basis of the index solution, the effects of different distributed power sources on the static voltage stability of the distribution system are studied from the grid capacity, the grid position, the power factor, and the type of distributed power, and the voltage sensitive nodes in the system are found out.

【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM712

【参考文献】