风电场接入电力系统的容量优化研究

发布时间：2018-02-24 03:30

本文关键词： 风电场统计特性容量频率约束　出处：《华中科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着世界各国经济的大力发展，人类物质生活质量显著提高，地球上传统能源的不断消耗和自然资源遭到的破坏也给人们带来了严重的问题。因此，大力开发和发展新能源已成为人类可持续发展的必然要求。风能是一种清洁、可再生的能源，风力发电已经被越来越多的国家采用。近年来，我国的风电装机容量不断增加，但就风力发电的技术水平而言，尤其是在风电场接入系统后的运行方面，我国与世界许多国家都还存在着不小的差距，尽管装机容量持续增加，但我国的实际风电并网中的“脱网”和“弃风”问题也日益明显。为了改善风电并网时电力系统的运行状况，提高风能的利用率，对风电接入电力系统的最大容量优化问题做研究是很有必要的。本文首先阐述了问题的研究背景和国内外的相关研究现状，介绍了各种研究风电场接入电力系统最大容量的方法，然后对搜集的风电场数据进行研究分析，利用MATLAB对几个典型的风电场进行了出力和波动量的概率分布拟合，得出风电场统计特性的相关结论，接着利用动态仿真法，在PSCAD/EMTDC平台上对算例系统的风电接入系统的最大容量进行了研究，分别选取了从一个节点和多个节点接入风电场的情况对算例进行了仿真。最后介绍了频率约束法的基本思想，基于频率约束法对风场从多点接入电力系统的容量优化问题进行了建模分析，再运用遗传算法对模型进行了求解，将计算结果和动态仿真法得出的结果进行了比较，，发现二者比较接近，验证了电力系统多个节点接入风电场时的最大接入容量比单个节点接入风电场时要大。
[Abstract]:With the rapid development of the world economy, the quality of human material life has been greatly improved, and the continuous consumption of traditional energy and the destruction of natural resources on the earth have also brought serious problems to people. Vigorously developing and developing new energy has become the inevitable requirement of human sustainable development. Wind energy is a kind of clean and renewable energy. Wind power generation has been used by more and more countries. In recent years, the installed capacity of wind power in China has been increasing, but in terms of the technical level of wind power generation, In particular, in terms of the operation of wind farms connected to the system, there is still a large gap between China and many other countries in the world, although the installed capacity continues to increase. However, the problems of "decoupling" and "abandoning wind" in the actual wind power grid are becoming more and more obvious in our country. In order to improve the operation condition of the power system when wind power is connected to the grid, and to increase the utilization rate of wind energy, It is necessary to study the optimization of the maximum capacity of wind power connected to power system. Firstly, this paper describes the background of the problem and the current research situation at home and abroad. This paper introduces various methods to study the maximum capacity of wind farm connected to power system, and then analyzes the collected wind farm data, and uses MATLAB to fit the probability distribution of the output and fluctuation of several typical wind farms. The conclusion of wind farm statistical characteristics is obtained, and then the maximum capacity of wind power access system is studied on PSCAD/EMTDC platform by using dynamic simulation method. The case of connecting wind farm from one node and more than one node is selected and simulated. Finally, the basic idea of frequency constraint method is introduced. Based on the frequency constraint method, the capacity optimization problem of wind field from multiple points to power system is modeled and analyzed, and then the genetic algorithm is used to solve the model. The results are compared with those obtained by dynamic simulation method. It is proved that the maximum access capacity of multiple nodes in power system is larger than that of a single node when the wind farm is connected to the wind farm.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM614

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