【作者】 周乐荣；

【导师】 韦岗；

【作者基本信息】 华南理工大学 ， 通信与信息系统， 2004， 博士

【摘要】 自90年代以来，我国电力信息化上了一个新的台阶。然而目前电力系统还不能实现无缝通信，首要的问题是缺乏一个统一的规程、协议。国内外对此已进行大量研究，如美国电力科学研究院(EPRI)制定了UCA(实用通信体系，UtilityCommunication Architecture)，为电力通信系统对象建模开辟了新的篇章，国际电工委员会(IEC)将其定为国际标准，并且成立IEC 61850作为电力无缝通信统一模型。但是这种模型还不完善，其主要问题是缺少理论上的证明，主要靠厂家提供产品从实践中获得经验。 电力线通信已成为国内外电气工程、网络工程等领域的热点研究课题。传统的PLC调制算法往往不能对付电力线的强干扰，带宽还不能与电信宽带的接入技术相比拟。为此，电力线通信技术正趋向于采用多载波调制和扩频通信技术。 本论文针对上述问题系统地开展研究，主要贡献包括： 通过分析国内外各种通信协议体系的理论研究成果，首次提出了基于调度层、网络层、网元层和点设备层的4层电力无缝通信结构；首次提出采用Petri网定义、分析和描述电力系统无缝通信模型，给出了基于Petri网的电力通信无缝一致模型，弥补了传统的电力通信模型缺乏统一数学语言描述的不足。 分析了以往基于OFDM调制技术的PLC的不足，结合CDMA技术提出了一种新的更加适合于电力系统环境下的电力线载波通信调制技术(OFDM-CDMA)。从理论上证明了本方法能够获得更高的数据传输速率，从而能提高电力系统通信效率。 结合OPN(对象Petri网)的优点，采用OPN对TASE．2协议建模，提出了一种采用面向对象技术的电力系统信息模型(O~2PSIM)，并以组建的广州调度数据实验网为例，采用CPN Tools进行了仿真，仿真结果与现场测试结果相符，为今后建设调度数据网奠定了理论基础和实践依据。 变电站通信协议的不统一，导致了各种设备之间的不兼容性。解决这一问题的关键是建立统一的网元(如变电站)模型。本文采用UCA面向对象方法建立统一网元模型。分析了UCA现场通信设备在变电站的具体应用和详细的数据映射及过渡方案，并提出了UCA数据通信模型在变电站现场通信设备的实现过程。更多还原

【Abstract】 Since 1990s, the applications of information technologies in power network in China are taking a new trip. However, the power network is still far away from a seamless communication network. No general standard or protocol is developed. Recently, the American Electric Power Research Institute (EPRI) issued the Utility Communication Architecture (UCA) for power network, which is latterly extended by the International Electric Committee (IEC) to be an international standard. Now the UCA absorbs lots of research attention. However, the UCA lacks theoretical analysis. The Architecture is an experimental result from the practical application.Another key problem in power network communication is the Power Line Communication (PLC). Power line is quite different with the traditional communication media used in existing communication networks. It is reported that the newest technique of PLC only promise a transmission rate of 45Mbps, which is by far lower than that of Ethernet (100/1000Mspb). Therefore, the PLC needs further research to meet the practical requirement.In the dissertation we focus on the mentioned problems. Our contribution includes:We propose a new 4-layers (the dispatch layer, the network layer, the net unit layer, the point equipment layer) architecture for seamless communication based on the power network. Theoretical analyses of the new architecture are also provided. We throw the emphases in analyzing various key technologies on information theory between substation and control center.Power industry communication market is one of the power industry information components. PLC access technology application is wider and wider on the market. However, in view of its various characteristic such as noise disturbing, the traditional PLC access technology can not achieve the higher speed of access market, and it is the disadvantage in competition on market. This thesis analyzes the shortcoming of PLC technology based on OFDM technology at present. And then combining CDMA and OFDM technology and propose a new PLC modulation and demodulation technology (OFDM-CDMA), which can achieve higher transfer speed in theory, and its effectiveness illustrated by computer simulations.We use the Object-oriented Petri Net (OPN) to model the TASE.2 protocol.更多还原