微电网运行特性及保护控制设备闭环测试平台研究

发布时间：2018-03-04 00:21

本文选题：分布式发电　切入点：微电网　出处：《天津大学》2014年硕士论文　论文类型：学位论文

【摘要】：微电网将微型电源、储能设备、负荷以及控制与保护装置整合在一起,形成一个单一可控的配电网单元。由于微电网系统中包括大量的电力电子设备,控制方式复杂,掌握其运行特性和故障特性是保证微电网正常运行及控制的基础。本文在实时数字仿真器(Real Time Digital Simulator,RTDS)上搭建了微电网的数字仿真平台,实现对分布式电源和微电网运行及控制的全面、深入的分析和仿真。本文的研究内容及成果如下:(1)介绍了微电源的RTDS模型,包括恒速恒频风力发电模型、双馈式变速恒频风力发电模型、直驱永磁式变速恒频风力发电模型、光伏发电模型、蓄电池储能模型、超级电容储能模型,为微电网仿真研究提供了基础。(2)在对微电源基本控制方法和微电网运行控制策略进行深入分析的基础上,搭建基于RTDS平台的微电网仿真模型。研究微电网在并网、孤网运行模式及其相互切换的动态运行特性。采用实际的微电网参数对中新天津生态城进行仿真,对实际运行波形与仿真波形进行对比分析,在验证得到正确的模型后,针对发现的问题,通过仿真确定系统的合理参数,为真实系统参数设置和控制策略提供指导。(3)建立微电网的仿真模型,分析并网和孤岛两种运行模式下,微电网的故障特性及对配电网保护的影响。采用真实设备及仿真模型相结合的方法,搭建微电网并网保护控制装置闭环测试平台,仿真模拟微电网系统输入输出及运行特性,开展微电网并网控制器的测试试验。
[Abstract]:Microgrid integrates micro power supply, energy storage equipment, load and control and protection devices to form a single controllable distribution network unit. Mastering its operation characteristic and fault characteristic is the foundation to guarantee the normal operation and control of microgrid. In this paper, the digital simulation platform of microgrid is built on Real Time Digital Simulator RTDSs. The research contents and results of this paper are as follows: 1. This paper introduces the RTDS model of micro power supply, including constant speed constant frequency wind power generation model. Doubly-fed variable speed constant frequency wind power generation model, direct-drive permanent magnet variable speed constant frequency wind power generation model, photovoltaic generation model, battery energy storage model, super capacitor energy storage model, On the basis of deep analysis of the basic control method of micro-power supply and the control strategy of micro-grid operation, the simulation model of micro-grid based on RTDS platform is built, and the grid-connected microgrid is studied. The operating mode of isolated network and its dynamic operation characteristics of switching each other. The actual parameters of microgrid are used to simulate the Zhongxin Tianjin Ecological City, and the actual operation waveform and the simulation waveform are compared and analyzed, and the correct model is obtained after the verification. Aiming at the discovered problems, the reasonable parameters of the system are determined by simulation, and the simulation model of microgrid is established by providing guidance for the real system parameter setting and control strategy. Under the two operation modes of grid-connected and islanding, the simulation model of micro-grid is established. The fault characteristics of microgrid and its influence on distribution network protection. The closed loop test platform of microgrid protection control device is built by combining real equipment and simulation model, and the input, output and operation characteristics of microgrid system are simulated. The test test of microgrid grid-connected controller is carried out.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM732

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