基于综合目标函数的风电场储能容置优化研究

发布时间：2019-03-27 07:28

【摘要】：随着煤、石油等化石能源的日益枯竭及其带来的环境污染问题日益突出,全世界范围内对于太阳能、风能等可持续的清洁能源的研究的重视程度日益增加。风力发电是一种可再生的清洁能源,并且是可再生能源发电技术中发展最快和最为成熟的一种方式,已经具备了大规模商业开发和技术和经济条件。储能系统可以实时得根据电网实际情况动态吸收或者释放能量,因此在风电场中适量的加入储能系统可以合理配置风电场的输出功率。储能系统的特性决定了储能系统可以有效解决我国能源分布与需求矛盾的问题。此外储能系统还可以实现削峰填谷的功能。储能系统的以上特性决定了储能系统是我国未来电力系统建设不可缺少的部分。风储联合系统接入电网对于电网的可靠性会带来影响,同时风电场的经济性也会发生变化。为了改善风电的经济性,同时提高风储系统的可靠性,本文主要做了以下工作。首先对实际风能进行了风资源特性以及风电场风功率特性分析,以美国BPA地区的风功率数据为基础进行了时间序列法和空间相关性法风功率预测方法的比对和分析,研究表明两种预测方法所得风电机组出力的误差分析,时间序列法体现较好的时序性。对目前常用的储能设备进行了总结,并且对研究中常用的储能建模方式进行了总结。最后简要总结目前储能系统并网的常见方式,构建了本文中使用的风储联合发电系统模型。其次建立可靠性和经济性评估体系。在算例中进行应用,评估应用两种不同仿真方法时RTS79测试系统的可靠性,并对比将部分常规机组替换为风电机组后可靠性变化、增加风电机组后的可靠性变化、增加风储联合发电系统后的可靠性变化;介绍电力系统经济性标准和评估指标方法,并对某风场实际风机出力进行相应的仿真分析。风储联合系统接入电网对于电网的可靠性会带来影响,同时风电场的经济性也会发生变化。可靠性的变化可以表现为电力不足期望等参数来表现;经济性的变化可以通过电网发电成本等来体现,本文会结合电网可靠性指标以及经济性指标,提出一种新的目标函数来优化风电场储能容量优化并在RTS79系统上进行了验证。本文的研究取得了一定的成果,但仍存在不足之处,主要由及以下几点:忽略了可能影响到系统的可靠性的输电线路传输容量越限现象;仿真结果中存在着波动现象,需要进一步进行仿真探究。
[Abstract]:With the increasing depletion of fossil energy such as coal and petroleum and its environmental pollution, more and more attention has been paid to the study of sustainable clean energy such as solar energy and wind energy all over the world. Wind power generation is a kind of renewable clean energy, and it is the fastest-growing and most mature way of renewable energy generation technology. It has possessed large-scale commercial development and technical and economic conditions. The energy storage system can absorb or release energy dynamically according to the actual situation of the power grid in real time, so the output power of the wind farm can be reasonably configured by adding appropriate amount of energy storage system to the wind farm. The characteristics of the energy storage system determine that the energy storage system can effectively solve the contradiction between energy distribution and demand in China. In addition, the energy storage system can realize the function of cutting peak and filling valley. The above characteristics of the energy storage system determine that the energy storage system is an indispensable part of the future construction of the power system in China. Combined wind storage system access to the grid will affect the reliability of the grid, and the economy of the wind farm will also change. In order to improve the economy of wind power and improve the reliability of wind storage system, the following work has been done in this paper. Firstly, the wind resource characteristics and wind power characteristics of wind farms are analyzed. Based on the wind power data of BPA region in the United States, the comparison and analysis of the time series method and the spatial correlation method are carried out to predict the wind power. The results show that the error analysis of wind turbine output obtained by the two forecasting methods shows that the time series method shows good timing. The current common energy storage equipment is summarized, and the commonly used energy storage modeling methods are summarized. Finally, the common ways of grid-connected energy storage system are summarized briefly, and the model of wind-storage combined power generation system used in this paper is constructed. Secondly, establish the reliability and economic evaluation system. The reliability of the RTS79 test system is evaluated by using two different simulation methods, and the reliability changes after replacing some conventional units with wind turbines are compared to increase the reliability changes after the wind turbines are replaced by two different simulation methods. The reliability change after increasing the wind-storage combined power generation system; This paper introduces the economic standard and evaluation index method of power system, and carries on the corresponding simulation analysis to the actual fan output of a certain wind field. Combined wind storage system access to the grid will affect the reliability of the grid, and the economy of the wind farm will also change. The change of reliability can be represented by the parameters such as electric power shortage expectation and so on. In this paper, a new objective function is proposed to optimize the energy storage capacity of wind farm based on the reliability index and economic index of the power network. It is verified on the RTS79 system. The research in this paper has achieved some achievements, but there are still some shortcomings, mainly from and the following points: neglecting the transmission line transmission capacity which may affect the reliability of the system; There are wave phenomena in the simulation results, which need to be further investigated.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM614

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