微网分层控制结构及其通信系统

发布时间：2018-06-15 05:30

本文选题：微电网 + 分层控制　；参考：《浙江大学》2014年硕士论文

【摘要】：进入21世纪以来,随着电网的发展,传统大规模电网的弊端日趋凸显,而且近年来世界上已经发生多起大规模停电事故,以及传统电网主要依赖的能源也日趋紧张,因此如何能更加有效的利用可再生绿色能源已经成为一个重要的课题。微电网的产生,不但一定程度上能减轻能源紧张的问题,同时还能有效的提高电网的可靠性。由于微电网系统中,为了能使微电网可靠安全的运行,需要各个分布式电源之间协调控制运行,而不同的控制结构具有不用的特点,本文首先分析比较了对等控制、主从控制和分层控制,总结了三种控制策略的利弊,着重分析研究了分层控制结构的控制策略,并且通过MATLAB仿真,进一步验证说明了分层控制的优势所在。在分层控制中,每层所控制的对象和特点不同,对响应时间要求也有所不同,本文由此提出了每层响应时间的尺度,为之后的通信系统设计打下基础。由于微电网的协调控制依赖于可靠的通信系统,使得通信系统也显得尤为重要。本文根据微电网通信系统的特点,提出了采用基于以太网的IEC61850通信协议来构建微电网通信系统,根据IEC61850通信协议,对微电网通信系统进行建模,并且根据分层控制结构对于响应时间的不同要求,一次控制选择GOOSE服务协议,二次、三次控制(经济调度)选择MSS服务协议。为了能在调试过程中,能加直观的监测微电网系统的运行状态,利用LabVEW和PLC设计一套数据采集系统,配合微电网的建设。
[Abstract]:Since the 21st century, with the development of the power grid, the disadvantages of the traditional large-scale power grid have become increasingly prominent, and in recent years, there have been many large-scale power outages in the world, and the energy sources that the traditional power grid relies on are becoming increasingly tense. Therefore, how to use renewable green energy more effectively has become an important issue. The generation of microgrid can not only alleviate the problem of energy shortage, but also improve the reliability of power grid effectively. In order to make the microgrid run reliably and safely, it is necessary to coordinate the control operation among the distributed power sources. However, different control structures have the characteristics of no need, so this paper first analyzes and compares the peer-to-peer control. The advantages and disadvantages of the three control strategies are summarized, and the control strategies of the hierarchical control structure are analyzed and studied. The advantages of the hierarchical control are further verified by MATLAB simulation. In hierarchical control, different objects and characteristics are controlled in each layer, and the response time requirements are also different. In this paper, the scale of response time in each layer is proposed, which lays the foundation for the design of communication system. The coordinated control of microgrid depends on reliable communication system, which makes communication system especially important. According to the characteristics of microgrid communication system, this paper puts forward to use IEC61850 communication protocol based on Ethernet to construct microgrid communication system. According to IEC61850 communication protocol, the microgrid communication system is modeled. According to the different requirements of the hierarchical control structure for response time, the first control selects the goose service protocol, and the second and third control (economic dispatch) selects the MSS service protocol. In order to monitor the running state of microgrid system intuitively, a data acquisition system is designed by using LabVEW and PLC in the process of debugging, which can cooperate with the construction of microgrid.
【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】：TM73

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