Tele-control Communication, Unit And Network Model In Seamless Power Line Communications

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.