适应于分布式电源接入的直流配电模拟实验系统研究

发布时间：2018-01-24 18:28

本文关键词： 直流配电网直流配电模拟实验系统仿真模拟动态模拟模型建立　出处：《浙江大学》2014年硕士论文　论文类型：学位论文

【摘要】：传统的交流配电网面对日益增长且密集的用电负荷,面临着供电走廊紧张、电能质量问题突出、分布式能源接入以及电能供应可靠性、经济性等方面的巨大挑战。研究资料表明,基于直流的配电网具有提高供电容量、减小线路损耗、改善用户侧电能质量、隔离交直流故障,以及可再生能源灵活、便捷接入等一系列优点,因此直流配电以其优势获得了广大研究者的青睐,国内对直流配电网的研究主要集中在稳态分析、故障分析与保护、稳定运行控制、电能质量控制等方面。建立专门的直流配电实验系统,可以为直流配电技术的研究提供仿真与试验研究,推动直流配电技术的发展。在本文中,对适应于分布式能源接入的直流配电模拟实验系统进行了研究。首先本文整理并归纳了直流配电系统以及动模试验系统的基本概念,对直流配电网的拓扑母线结构、电压等级、控制与保护进行了简述和总结。另一方面,对建立动态模拟试验系统的相似原理和模拟比以及常见的模型建立做了简要的概述,为后续直流配电模拟实验系统的建立提供理论基础和支持。在此基础上,本文分析了直流配电模拟实验系统的结构组成和功能,确定由物理模拟(动态模拟)与数字模拟(仿真模拟)两部分构成,可开展直流配电网拓扑结构、系统控制与保护等相关技术的建模仿真与实验研究,以及变流器、直流断路器等直流配网关键设备的功能性试验研究。基于此目标,本文对仿真模拟平台的软件设备选择做了对比研究,确定PSCAD和RT-LAB作为纯数字仿真和实时仿真软件。接着对模拟实验系统中的主要部分,动态模拟实验系统的拓扑结构、电压等级等参数做了研究和设计,并对其中主要的模型(包括分布式电源、储能装置、负荷、配电线路、直流变压器、直流断路器等)在实验室中的模拟做了详细的研究和论述。此外,还对实验系统的测量控制与监控系统以及设备检验做了分析和设计。最后,利用模拟仿真的纯数字仿真软件对典型的基于分布式电源的直流配电系统进行了简单的建模仿真。
[Abstract]:The traditional AC distribution network faces the increasing and intensive power load, the shortage of the power supply corridor, the prominent power quality problems, the distributed energy access and the reliability of the power supply. The research data show that the distribution network based on DC can improve the power supply capacity, reduce the line loss, improve the power quality on the user side, and isolate the AC / DC fault. As well as renewable energy flexible, convenient access to a series of advantages, so DC distribution for its advantages have been favored by the majority of researchers, the domestic research on the DC distribution network is mainly focused on the steady state analysis. Fault analysis and protection, stable operation control, power quality control and other aspects. The establishment of a special DC distribution experiment system can provide simulation and experimental research for DC distribution technology. Promote the development of DC distribution technology. In this paper, the DC distribution simulation experiment system suitable for distributed energy access is studied. Firstly, the basic concepts of DC distribution system and dynamic model test system are summarized. The topology bus structure, voltage grade, control and protection of DC distribution network are briefly described and summarized, on the other hand. This paper gives a brief overview of the similarity principle, simulation ratio and common model establishment of the dynamic simulation test system, which provides the theoretical basis and support for the establishment of the subsequent DC distribution simulation experiment system. On this basis, this paper analyzes the structure and function of DC distribution simulation experiment system, which is composed of physical simulation (dynamic simulation) and digital simulation (simulation simulation). It can be used for modeling, simulation and experimental research on topology structure of DC distribution network, system control and protection, and converter. Based on this goal, this paper makes a comparative study on the software equipment selection of the simulation platform. PSCAD and RT-LAB are chosen as pure digital simulation and real-time simulation software. Then, the topology of the dynamic simulation experimental system is given to the main parts of the simulation experiment system. The parameters such as voltage level are studied and designed, and the main models (including distributed power generation, energy storage device, load, distribution line, DC transformer) are studied and designed. The simulation of DC circuit breaker in the laboratory is studied and discussed in detail. In addition, the measurement control and monitoring system and the equipment inspection of the experimental system are analyzed and designed. The simple modeling and simulation of a typical DC distribution system based on distributed power supply is carried out by using the pure digital simulation software of simulation.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM743

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