风光储联合发电系统动态等值模型研究

发布时间：2018-05-30 21:32

本文选题：风光储联合发电系统 + 动态等值模型　；参考：《电子科技大学》2014年硕士论文

【摘要】：随着并网风光储联合发电系统容量的不断增加,由风能、太阳能的间歇性、随机性所带来的出力波动对电力系统造成的影响日益凸显。因此,有必要对发电系统的有功功率输出特性加以分析,建立合适的系统动态模型,以评估其接入电力系统所产生的影响,并为有功功率控制算法的研究提供指导。本文结合详细模型仿真过程复杂的实际,在考虑风光储联合发电系统结构及运行特性的基础上,研究了系统等值建模的总体方法,并针对风、光发电单元之间运行点差异较大的特点,提出了一种用于有功功率输出特性分析的多机表征动态等值建模方法。具体研究内容如下:1.根据风光储联合发电系统及其子系统的结构、动态运行特性,研究了发电系统等值建模的总体方法。该方法首先根据单元机组的构成和运行原理,建立单元级机组模型;再按照风、光、储三个组成部分,分别进行场级等值建模;最后将场级模型相组合,建立发电系统的动态等值模型。2.在场级等值建模方面,针对风、光各发电单元之间运行点差异较大的特点,提出了一种基于模糊聚类算法的多机表征等值建模方法,用于双馈风电场、光伏发电系统的有功功率输出特性分析。该方法提取了能够表征双馈感应风力发电机组(DFIG)、光伏发电单元有功功率输出特性的指标;并将模糊C-均值聚类算法(FCM)首次应用到风电场、光伏发电系统的等值建模中,通过对指标数据进行聚类分析,得到机组分群结果;最后,将风、光机组及集电系统参数等效聚合。对于电池储能系统,由于储能单元的运行状态相近,则选择单机表征法建立场级等值模型。3.在Matlab/Simulink环境下搭建风光储联合发电系统动态等值模型,针对系统的有功功率输出特性,进行了仿真实验。仿真结果表明:根据本文所提出动态等值建模方法建立的系统模型,能够有效表征发电系统的有功功率输出特性,并且弥补了静态模型无法实时反映发电系统动态运行特性的不足,同时简化了模型、简便了计算,该模型可适用于风光储联合发电系统的有功功率动态特性分析。
[Abstract]:With the continuous increase of the capacity of grid-connected wind-storage combined generation system, the impact of the intermittent and randomness of wind and solar energy on the power system is becoming more and more prominent. Therefore, it is necessary to analyze the active power output characteristics of the power generation system and establish a suitable system dynamic model to evaluate the impact of the power system access and provide guidance for the study of the active power control algorithm. Based on the complex simulation process of the detailed model and considering the structure and operation characteristics of the combined generation system, this paper studies the overall method of the system equivalent modeling, and aims at the wind, In this paper, a dynamic equivalent modeling method based on multi-machine representation for the analysis of active power output characteristics is proposed. The specific contents of the study are as follows: 1. According to the structure and dynamic operation characteristics of the wind storage combined generation system and its sub-system, the overall method of equivalent modeling of the generation system is studied. In this method, first of all, according to the composition and operation principle of the unit, the unit model of the unit is established; then according to the three components of wind, light and storage, the equivalent modeling of the field level is carried out respectively; finally, the field level model is combined together. The dynamic equivalent model of generation system. In the field of equivalent modeling, a multi-machine representation equivalent modeling method based on fuzzy clustering algorithm is proposed for wind and light generating units, which can be used in doubly-fed wind farms. Analysis of active power output characteristics of photovoltaic power generation system. This method extracts the indexes that can characterize the active power output characteristics of DFIGN and photovoltaic units of doubly-fed induction wind turbines, and applies the fuzzy C-means clustering algorithm to wind farm, photovoltaic system equivalent modeling for the first time. By cluster analysis of the index data, the cluster results of the units are obtained. Finally, the parameters of the wind, optical and collector systems are equivalent polymerized. For the battery energy storage system, the field equivalent model .3 is established by using the single machine representation method because of the similar operating state of the energy storage unit. The dynamic equivalent model of the combined wind and storage generation system is built in Matlab/Simulink environment, and the simulation experiment is carried out according to the active power output characteristics of the system. The simulation results show that the system model established by the dynamic equivalent modeling method proposed in this paper can effectively characterize the active power output characteristics of the power generation system. The static model can not reflect the dynamic characteristics of the generation system in real time. At the same time, the model is simplified and the calculation is simple. The model can be used to analyze the dynamic characteristics of active power in the combined generation system.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM61

【参考文献】