孤岛新能源发电微电网的能量管理方案设计

发布时间：2018-08-10 21:33

【摘要】：响应国家节能减排的政策,微电网引入新能源与储能系统结合的结构。我国西藏等偏远高海拔地区可再生能源丰硕,是此类微电网发电建设的优秀实验基地。但是该环境下的发电系统:新能源的不可预测性和瞬时间歇性;环境条件对储能配置要求高;脱离大电网的情况下发电模块与储能之间的稳定配合等管理问题有待解决。本文以阿里电站为实例背景,建立孤岛新能源发电系统,就如何解决以上提出的问题做能量管理系统的应用设计。其具体内容包括:首先学习对比了的典型微电网的结构与原理,在此基础上结合实际工程背景设计了风/光/柴/储的孤岛微电网结构,并根据各个发电模型的物理特性分别建立了主要部分的出力模型。在低温高海拔的环境下配置了较适应的储能系统。选择比较了常用蓄电池的特性;分析可再生能源与储能容量的配比策略;还介绍了系统电池管理功能及其主动均衡的意义。应用PCS双向变流器对系统实行双向控制管理,使它能在并网与孤岛方式之间达到自由转换的目的。利用V/f控制方式,确保微网能在孤岛方式下稳定的输出频率和电压,在Matlab/Simulink平台建立模拟现场环境,结果证明了该控制方案的可行性。综上理论基础,以最优经济为目标,应用改进版的储能电池硬充电能量管理方案设计了孤岛模式下的最优经济能量调度策略。除此之外,还结合实际,简单介绍了系统在不同运行模式之间的切换管理方案。最终基本做到了该工程背景下,孤岛新能源发电微电网的能量管理方案的设计。
[Abstract]:In response to the national policy of energy saving and emission reduction, microgrid introduced the structure of new energy and energy storage system. Tibet and other remote high altitude areas are rich in renewable energy, which is an excellent experimental base for the construction of such microgrid power generation. However, in this environment, the unpredictability and transient intermittency of new energy sources, the high requirement of energy storage configuration under environmental conditions, and the stable coordination between generation modules and energy storage in the absence of large power grids remain to be solved. In this paper, taking Ali Power Station as an example, a new energy generation system for isolated islands is established, and the application design of energy management system is made on how to solve the above problems. The main contents are as follows: firstly, the structure and principle of typical microgrid are studied and compared. Based on this, the isolated island microgrid structure of wind / light / firewood / storage is designed based on the actual engineering background. According to the physical characteristics of each generation model, the output models of the main parts are established respectively. A more suitable energy storage system was installed at low temperature and high altitude. The characteristics of battery in common use are selected and compared, the ratio strategy of renewable energy and energy storage capacity is analyzed, and the system battery management function and its significance of active equalization are also introduced. The bi-directional control management of the system is carried out by using PCS bidirectional converter, so that it can achieve the purpose of free conversion between grid-connected and islanding mode. The V / F control method is used to ensure the stable output frequency and voltage of the microgrid in the isolated island mode. The simulation field environment is established on the Matlab/Simulink platform. The results show that the control scheme is feasible. On the basis of the theory and aiming at the optimal economy, the optimal economic energy scheduling strategy in isolated island mode is designed by using the improved hard charge energy management scheme of energy storage battery. In addition, the switching management scheme between different operation modes is introduced. Finally, the design of the energy management scheme for the isolated island new energy generation microgrid under the background of the project is basically achieved.
【学位授予单位】：东华大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM727

【参考文献】