含分布式电源的微网储能系统控制研究

发布时间：2018-11-02 14:51

【摘要】：在当前能源需求不断增长,空气质量问题日益突出,环保问题逐步成为国际贸易隐性壁垒的社会大背景下,如何安全高效的开发可再生能源,尤其是风力发电和光伏发电等清洁能源已成为迫在眉睫的课题。微网作为一个相对独立的小型发配电单元可以极大地缓解分布式发电(DG)技术并网问题,让更多的可再生能源接入电网成为了可能。为了让微网安全稳定运行,微网中需要接入储能系统(ESS),以保障主网发生故障时微网中重要负荷的持续供电。本文主要研究微网储能系统的相关控制技术,并在此基础上展开分析研究,分别搭建了风力发电机组、光伏发电阵列和混合储能系统模型。同时为实现对可再生能源发电的最大功率点跟踪分别对风力机组变步长爬山搜索法和光伏发电阵列导纳增量法进行了研究。本文对能量成型控制方法理论基础作了必要分析,提出了对储能系统的控制从能量的观点出发的思路,并研究了基于能量成型的储能系统控制器设计。建立储能系统孤岛运行时的端口受控哈密顿(PCH)模型,在PCH模型的基础上通过阻尼注入和互联矩阵设计方法设计了储能系统的能量成型控制器。通过MATLAB/simulink仿真软件进行仿真,对基于能量成型的控制方法和传统PI控制方法进行了对比仿真分析,证明了能量成型方法在孤岛运行时的有效性和可行性。在并网条件下对能量成型控制方法和PI控制方法进行仿真分析,结果显示在并网条件下PI控制性能优于能量成型控制。并对储能系统功率分配进行进一步的分析研究,通过在储能系统中引入了低通滤波器,优化储能系统的能量配置,并对引入低通滤波器后采用PI控制的储能系统做了仿真验证。
[Abstract]:Under the background of the increasing energy demand, the increasingly prominent air quality problem and the environmental protection problem becoming the recessive barrier to international trade, how to develop renewable energy safely and efficiently? In particular, clean energy such as wind power and photovoltaic power has become an urgent issue. As a relatively independent small generation and distribution unit, microgrid can greatly alleviate the problem of grid-connected distributed generation (DG) technology, and make it possible for more renewable energy to connect to the grid. In order to make the microgrid run safely and stably, it is necessary to access the energy storage system (ESS),) in the microgrid to ensure the continuous power supply of the important load in the microgrid when the main network fails. In this paper, the related control technology of microgrid energy storage system is studied, and the models of wind turbine, photovoltaic array and hybrid energy storage system are built. At the same time, in order to realize the maximum power point tracking of renewable energy generation, the variable step-size mountain climbing search method and photovoltaic array admittance increment method are studied respectively. In this paper, the theoretical basis of energy forming control method is analyzed, and the idea of energy storage system control from the view of energy is put forward, and the controller design of energy storage system based on energy forming is studied. The port controlled Hamiltonian (PCH) model of energy storage system is established when the island is running. Based on the PCH model, the energy forming controller of the energy storage system is designed by means of damping injection and interconnect matrix design method. The control method based on energy forming and the traditional PI control method are compared and analyzed by MATLAB/simulink simulation software, and the validity and feasibility of the energy forming method in the operation of isolated island are proved. The simulation analysis of energy forming control method and PI control method under grid-connected condition shows that the control performance of PI is better than that of energy forming control under grid-connected condition. The power distribution of the energy storage system is further analyzed and studied. The energy allocation of the energy storage system is optimized by introducing a low pass filter into the energy storage system. The simulation results of the energy storage system controlled by PI after the introduction of the low pass filter are also given.
【学位授予单位】：新疆大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM727

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