【作者】 马奎安；

【导师】 陈敏； 徐德鸿；

【作者基本信息】 浙江大学 ， 电力电子与电力传动， 2010， 硕士

【摘要】 随着经济的发展,人类对电力的质量和可靠性的要求越来越高。而未来电网面临的一个重要问题是电网发电和电网负荷的不平衡,因而在用户负荷端加载储能系统解决电能供需不平衡是一件很有意义的事情。本文介绍了应用于电力系统中的各种储能技术;介绍了双电层型超级电容器的器件本体;介绍了超级电容器储能系统的各种典型应用;并介绍了应用于超级电容器储能系统中的各种双向DC/DC变流器。由于超级电容器的单体储能量有限,超级电容器储能系统需要一定数量的超级电容器串并联组合来达到所需要的储能量,这就需要对超级电容器的一般等效电路有所了解,本文介绍了超级电容器的各种等效电路,并采用其中一种等效电路研究超级电容器组的串并联组合方法。搭建了一个小的超级电容器储能系统。对搭建的超级电容器储能系统的超级电容器组,主电路硬件和控制电路硬件进行了设计,由于超级电容器储能系统主要应用于解决电能的供需不平衡,所以超级电容器储能系统中的双向DC/DC变流器有两种工作模式:超级电容器组从电网吸收能量储能时,双向DC/DC变流器工作于Buck电路模式:超级电容器组向电网释放能量时,双向DC/DC变流工作于Boost电路模式。本文对双向DC/DC变流器的两种工作模式进行了建模分析,并根据实际系统的参数,设计了闭环参数。最后对超级电容器储能系统的两种工作模式进行了实验。实验结果表明,通过对超级电容器储能系统中超级电容器组的设计和双向DC/DC变换器的闭环控制参数设计,超级电容器储能系统能够实现解决电能供需不平衡。更多还原

【Abstract】 With the development of economic, the power quality and reliability have becoming more and more important to human. And the problem of the power system is the imbalance of power generation and grid load, so adding energy storage system at the user load side to solve the power imbalance problem between supply and demand is a very significant thing.In this paper, the storage technologies used in power systems were introduced; The super-capacitor device and the typical applications of super-capacitor energy storage system were introduced; and the various kinds of bi-directional DC/DC converter for the super-capacitor energy storage system were introduced. Because of the single super-capacitor storage energy limit, Super-capacitor energy storage system needs a certain number of super-capacitor series-parallel combined to achieve the required storage energy. This paper introduced all kinds of super-capacitor equivalent circuit by referencing to the literature, and introduced a series-parallel combination methods of the super-capacitor bank using one of the equivalent circuit.A small super-capacitor energy storage system is built. The super-capacitor bank, the main circuit hardware and the control circuit hardware used in super- capacitor energy storage system is designed. Because the super-capacitor energy storage system used in this paper is to solve the problem of the imbalance between energy supply and demand. So, the bi-directional DC/DC converter used in the super-capacitor energy storage system has two operating modes: When the super-capacitor energy storage system absorbed energy from the grid, the bi-directional DC/DC converter works in Buck mode. When the super-capacitor energy storage system release energy to the grid, the bi-directional DC/DC converter works in Boost mode. This paper modeling the bi-directional DC/DC converter in the two operating mode, at the same time, according to the system parameters, the closed-loop parameters is designed. Finally, experimental is done when the super-capacitor energy storage system in the working two mode, simulation and experimental results show that through the design of thesuper-capacitor bank and the bi-directional DC/DC converter closed-loop controlparameters in the super-capacitor energy storage system, the super-capacitor energystorage system can solve the problem of power imbalance between supply anddemand.更多还原