考虑弃风约束的电网规划

发布时间：2018-05-09 19:53

本文选题：弃风 + 风电消纳　；参考：《华中科技大学》2015年硕士论文

【摘要】：随着国民经济水平的提高和社会的发展,电力需求与日俱增,与此同时伴随着公众环保意识的提高以及对传统化石能源带来的环境问题和安全问题的担忧,以风电为代表的新能源得到越来越广泛的认同,我国的风电发展也由此经历一个快速发展期,风电累计装机与新增装机均居世界前列。伴随着风电装机容量的快速增长,风电场规划由于缺乏规范性的引导导致“窝电”的现象大量存在,我国每年都因风电“窝电”损失200亿千瓦时的电量,造成直接经济损失上百亿元。基于以上背景,研究含风电场的电网规划显得十分必要。传统的电网规划总是以电网完全消风电为目标,考虑几个极端场景来规划电网,既不能考虑风电本身的特性,又损失了大量投入成本。为此本文对考虑弃风约束的电网规划进行了深入研究,在深入分析风电弃风形成原因的基础上,重点讨论了电网结构是如何对风电弃风发挥作用的。在此基础上本文建立了考虑弃风电量约束的电网规划模型,该模型兼顾弃风与机组经济运行双重目标,能计算在给定弃风约束下的新增线路方案,并能反映规划方案下的电网运行基本情况。而后本文给出了基于遗传算法求解所建立的混合整数优化模型的求解思路。本文先以IEEE30节点算例系统对本文提出的模型进行了仿真验证,并给出每种场景下各个风电场的弃风与线路负载情况,并详细对比了不同装机容量下电网规划方案。进而又与传统的静态电网规划方法进行了对比,以印证本文所提出的方法能够考虑电网规划不同阶段的弃风情形,并且与传统电网规划方法相比能够减少大量投入成本,也更符合实际情况。在本文的最后,使用考虑弃风约束的电网规划方法在A省电网平台上进行仿真计算,提出以相关系数处理风电场相关性的方法,得到考虑不同的弃风约束下A省电网新增线路的规划方案。
[Abstract]:With the improvement of national economy and the development of society, the demand for electric power is increasing day by day. At the same time, with the improvement of public awareness of environmental protection and the concern about the environmental and safety problems caused by traditional fossil energy, Wind power as the representative of new energy has been more and more widely recognized, and the development of wind power in China has also experienced a rapid development period, wind power accumulative installed and new installed are among the leading in the world. With the rapid growth of wind power installed capacity, wind farm planning, due to the lack of normative guidance, lead to a large number of "nest power" phenomenon, China has lost 20 billion kilowatt-hours of electricity due to wind power "nest power" every year. Causing direct economic losses of tens of billions of yuan. Based on the above background, it is necessary to study the grid planning with wind farm. The traditional power network planning is always aimed at completely eliminating wind power, considering several extreme scenarios, which can not take into account the characteristics of wind power itself, but also lose a large amount of input cost. In this paper, the grid planning with wind rejection constraints is studied in depth. On the basis of in-depth analysis of the causes of wind power abandonment, this paper focuses on how the power grid structure plays a role in wind power abandonment. On the basis of this, a grid planning model considering the constraint of abandoned wind power volume is established. The model can calculate the new line scheme under given abandoned wind constraints by taking into account the dual objectives of the abandoned wind and the economic operation of the unit. And can reflect the basic situation of power network operation under the planning scheme. Then, the idea of solving the mixed integer optimization model based on genetic algorithm is given. In this paper, a IEEE30 node system is used to simulate the proposed model, and the wind rejection and line load of each wind farm under each scenario are given, and the power network planning schemes with different installed capacity are compared in detail. And then compared with the traditional static power network planning method, it is proved that the proposed method can consider the situation of wind abandonment in different stages of power network planning, and can reduce a lot of input cost compared with the traditional power network planning method. It is also more in line with the actual situation. At the end of this paper, the power network planning method considering wind abandonment constraints is used to simulate and calculate the power grid platform of province A, and a method to deal with the correlation of wind farm with correlation coefficient is put forward. A new line planning scheme for province A power network is proposed considering different outage constraints.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM715;TM614

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