无线通信技术在分布式光伏并网接入系统中的相关研究

发布时间：2018-01-19 08:06

本文关键词： 分布式发电光伏电站并网系统无线通信孤岛保护并网接口装置　出处：《安徽工程大学》2016年硕士论文　论文类型：学位论文

【摘要】：全球日益短缺的化石能源和大量使用化石燃料引起的温室效应促使着世界各国不断积极地开发利用新能源技术。以分布式光伏为代表的分布式发电技术得到了快速发展,大规模的分布式光伏电源开始接入配电网并网运行,同时也对配电网的运行管理带来一定影响。分布式光伏发电并网系统在连接逆变器与配电网的过程中起着重要的作用,本文针对大量分布式光伏并网所面对的通信接入问题和孤岛问题进行研究,提出利用无线通信技术解决这些问题。本课题主要完成的研究内容和工作成果如下：(1)本文通过收集阅读文献资料,深入了解课题研究的背景与意义,从分布式光伏发电并网系统原理入手,介绍了并网系统的结构和功能,分析分布式发电并网后对配电网结构的影响；综述了国内外分布式电源并网标准、配电通信网技术的发展和现有的分布式电源孤岛检测方法。(2)分析含分布式电源的配电网通信业务需求,结合业务需求总结出配电通信网络的性能要求,据此提出了满足要求的TD-LTE电力无线通信专网方案,解决大量分布式电源并网通信接入问题。(3)结合现有孤岛检测的优缺点,本文提出了两种孤岛检测方法,两种方法互为主备,均基于分布式电源并网接口装置。方法一采用自适应负载反孤岛的方案,即利用负载的自动投切,改变整体负载的特性,使得被动式反孤岛无死区。并采用PSCAD对该方案进行了仿真,验证了该方案的实用性。方法二基于本文所设计的TD-LTE电力无线专网的孤岛检测方法,通过对配网线路关键开关节点的状态订阅,实现电力网络拓扑自适应的孤岛检测方法(4)简述了分布式发电并网接口装置的设计思路,包括硬件电路设计、软件结构设计等。
[Abstract]:The global shortage of fossil energy and the mass use of fossil fuels in Greenhouse Effect have prompted the countries all over the world to actively develop and utilize new energy technologies. Distributed power generation technology, represented by distributed photovoltaic, has been rapidly developed. Rapid development. Large-scale distributed photovoltaic power supply began to be connected to the distribution network and connected to the grid. Distributed photovoltaic grid-connected system plays an important role in the connection between inverter and distribution network. In this paper, a large number of distributed photovoltaic grid-connected communication access problems and islanding problems are studied. This paper proposes to use wireless communication technology to solve these problems. The main research content and work results are as follows: 1) this paper through the collection of reading literature, in-depth understanding of the background and significance of the subject research. Based on the principle of grid-connected system for distributed photovoltaic generation, the structure and function of grid-connected system are introduced, and the influence of grid-connected distributed generation on the structure of distribution network is analyzed. This paper summarizes the standards of distribution network connection, the development of distribution communication network technology and the existing method of islanding detection of distributed power supply, and analyzes the communication service requirements of distribution network with distributed power supply. According to the service requirements, the performance requirements of the distribution communication network are summarized. Based on this, a TD-LTE power wireless communication network scheme is proposed to meet the requirements. Solve a large number of distributed power connected communication access problem. 3) combined with the advantages and disadvantages of existing islanding detection, this paper proposed two islanding detection methods, the two methods are main and standby. Both are based on the distributed power grid interface device. The first method is to adopt the scheme of adaptive load anti-islanding, that is, to change the characteristics of the whole load by using the automatic switching of the load. The passive anti-isolated island has no dead zone, and the scheme is simulated by PSCAD. The practicability of the scheme is verified. The second method is based on the islanding detection method of TD-LTE power wireless private network designed in this paper. The method of islanding detection to realize the topology adaptation of power network is presented. The design idea of the distributed power generation grid-connected interface device, including hardware circuit design, software structure design and so on, is briefly described.
【学位授予单位】：安徽工程大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM615;TN92

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