混合储能系统的控制策略及容量优化配置的研究

发布时间：2018-09-03 19:43

【摘要】：新能源系统的大规模应用是离不开微网的支撑,而新能源的间歇性以及不稳定性都是限制新能源发电系统发展的因素,因此利用微网中的储能装置来对微网中的电源输出的波动频率进行平抑。因此,目前对储能装置的研究也越来越多,本文从以下几个方面对储能系统进行了研究:本文首先对储能系统的背景以及意义,回答了储能系统在微网系统当中的作用这一重要问题,并且从关键技术的角度阐述了储能系统的研究现状,介绍了目前储能装置的分类,从中找到了目前研究现状当中所存在的问题,提出了本文的创新点;其次,介绍了自抗扰控制技术的相关理论,首先从传统的PID控制器入手,着重分析了传统PID控制器的一些缺陷,从而引出了自抗扰控制器;其次,根据自抗扰控制器参数过多这一缺陷,进而提出了线性自抗扰控制器;最后,利用数学方程对一个二阶LESO进行收敛性以及其频带特性分析;再次,提出了基于线性自抗扰技术的储能变流器的控制策略研究,分析了储能变流器的集中基本拓扑结构,并利用数学关系式推导了并网变流器的基本工作原理;在此基础之上,分别在abc静止坐标系与dq0旋转坐标系中推导了储能变流器的数学模型;在控制器的设计环节,包括储能系统的内环控制与外环控制,重点分析了内环控制,利用线性自抗扰控制器的优势对储能系统进行控制器的设计以及参数的整;在最后通过对比仿真实验验证了所设计的控制器具有良好的动态特性;最后,介绍了混合储能系统的容量优化配置的问题,从功能的角度上来说,储能分为能量型储能以及功率型储能两部分,但是每一种储能方式都有各自的优缺点,因此结合这两种储能方式的优点,本文提出了锂电池和超级电容的混合式储能系统,分析了Ragone曲线对储能元件分析的作用,提出了混合储能系统的优化配置方法并且利用算例进行验证,从经济性的角度来验证本文所提出的基于遗传算法的优化配置方法。
[Abstract]:The large-scale application of new energy system is inseparable from the support of microgrid, and the intermittent and instability of new energy are the factors that limit the development of new energy generation system. Therefore, the energy storage device in the microgrid is used to suppress the fluctuation frequency of the power output in the microgrid. Therefore, there are more and more researches on energy storage devices. In this paper, energy storage system is studied from the following aspects: firstly, the background and significance of energy storage system are discussed in this paper. This paper answers the important question of the function of the energy storage system in the microgrid system, and expounds the research status of the energy storage system from the point of view of the key technology, and introduces the classification of the energy storage device at present. The problems existing in the current research situation are found, and the innovation of this paper is put forward. Secondly, the related theory of ADRC is introduced. Firstly, the traditional PID controller is introduced. The defects of the traditional PID controller are analyzed emphatically, which leads to the ADRC. Secondly, according to the defect of the ADRC controller, the linear ADRC controller is proposed. The convergence and frequency band characteristics of a second-order LESO are analyzed by using the mathematical equation. Thirdly, the control strategy of the energy storage converter based on linear active disturbance rejection technique is proposed, and the concentrated basic topology of the energy storage converter is analyzed. The basic working principle of grid-connected converter is deduced by using mathematical relation, and the mathematical model of energy storage converter is deduced in abc static coordinate system and dq0 rotating coordinate system respectively. The inner loop control and the outer loop control of the energy storage system are included. The inner loop control is emphatically analyzed. The controller design and the parameter integration of the energy storage system are carried out by using the advantage of the linear ADRC controller. At last, the simulation results show that the controller has good dynamic characteristics. Finally, the optimal configuration of the capacity of hybrid energy storage system is introduced, from the point of view of function, Energy storage is divided into two parts: energy storage and power energy storage. However, each energy storage method has its own advantages and disadvantages. Therefore, a hybrid energy storage system for lithium battery and super capacitor is proposed in this paper. The effect of Ragone curve on the analysis of energy storage elements is analyzed, and the optimal configuration method of hybrid energy storage system is proposed and verified by an example. The optimization configuration method based on genetic algorithm is verified from the point of view of economy.
【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM46;TM53;TM912

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