基于微网的风光互补功率控制策略研究

发布时间：2018-02-07 17:49

  本文关键词： 最大功率跟踪 风光互补 分布式电源 母线电压平衡　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：风能和太阳能这两种常用的新能源现在已经得到了广泛的应用,然而由于风能和太阳能都受环境变化的影响很大,它们在应用的时候就有了一定的局限性,由于风能和太阳能具有天然的互补性,风光互补系统可以利用这种天然的互补性,因此本文对于风光互补系统进行研究。本文的主要内容是基于微网的风光互补系统的系统原理和方案的分析,从功率控制的角度分析整个系统的功率平衡,并对功率控制的算法进行研究,主要从以下几个方面进行具体工作内容的研究:首先对风、光和蓄电池的特性进行了建模以及特性分析,并基于微网的两种风光互补结构进行了分析比较,提出了基于直流母线并联的风光互补系统结构,下文基于这种结构和微源特性的功率控制提供依据;接下来对风能和太阳能的最大功率跟踪的算法进行分析,对常用的几种控制算法进行了分析和研究,以及其优缺点的分析比较提出了一种优化的算法结构;然后重点对功率控制的策略方法进行了研究,本文是基于直流母线对系统的的功率进行平衡控制,首先分析了母线电容对直流母线电压稳定对系统功率平衡的作用,然后对系统的各个模块运行状态分别在微网状态下和并网状态下进行了分析,分析了其和直流母线电压以及功率平衡的关系,从而基于直流母线电压的检测实现通过各个模式的切换,最终实现系统的功率平衡控制;最后运用matlab的simulink工具箱完成了基于微网的风光互补交直流母线结构的系统仿真模型搭建,并对系统的光伏系统和风力发电的最大功率跟踪进行仿真,比较了本文的改进算法和原来的优势;还对整个系统在微网和孤岛状态下进行了不同模式间的切换控制进行了仿真,验证了该方法的控制效果并搭建平台。
[Abstract]:Wind energy and solar energy, two common new energy sources, have been widely used now. However, because both wind and solar energy are greatly affected by environmental changes, they have some limitations when they are applied. Since wind and solar energy are naturally complementary, wind and solar systems can take advantage of this natural complementarity, The main content of this paper is to analyze the system principle and scheme of the wind complementary system based on microgrid, and analyze the power balance of the whole system from the point of view of power control. And the algorithm of power control is studied, mainly from the following aspects: firstly, the characteristics of wind, light and battery are modeled and analyzed. Two wind complementary structures based on microgrid are analyzed and compared, and the wind complementary system structure based on DC bus parallel connection is put forward, and the power control based on this structure and micro-source characteristic is provided below. Then the maximum power tracking algorithm of wind energy and solar energy is analyzed, several control algorithms are analyzed and studied, and the advantages and disadvantages of these algorithms are analyzed and compared, and an optimized algorithm structure is proposed. Then, the strategy method of power control is studied. The power balance control based on DC busbar is carried out in this paper. Firstly, the effect of busbar capacitance on DC bus voltage stability to system power balance is analyzed. Then the operation state of each module of the system is analyzed under the microgrid state and the grid-connected state respectively, and the relationship between the operation state and the DC bus voltage and power balance is analyzed. Therefore, based on the DC bus voltage detection, the power balance control of the system can be realized through the switching of each mode. Finally, the system simulation model based on the wind complementary AC / DC bus structure based on microgrid is built by simulink toolbox of matlab, and the maximum power tracking of photovoltaic system and wind power generation is simulated. The improved algorithm is compared with the original advantages, and the switching control between different modes is simulated under the condition of microgrid and isolated island, and the control effect of the method is verified and the platform is built.
【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
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本文编号：1494955