Application of optical fiber communication technology in power communication

Electric power communication is mainly for the automatic control, commercial operation and modern management of the power grid. It is the foundation of the power grid security and stability control system and dispatch automation system, the guarantee for the commercialization of power market operations, the important premise for the modernization of power system management, and the basis for the diversification of non-electricity industry operations. The application of optical fiber communication in electric power communication was originally to lay ordinary optical cables using the traditional buried, pipeline, overhead and other methods of the telecommunications sector to form an electric power fiber communication system. As we all know, the power system is a whole composed of the production, transmission, distribution and consumption of electric energy. In order to realize the transmission of electric energy across regions and long distances, the power system has built high-voltage transmission lines throughout the country; in order to meet the needs of the urban and rural residents for the production and consumption of electricity, there are also transmission and distribution pole roads and channels that are criss-crossed and densely populated with streets and villages . It can be said that high, medium and low voltage transmission and distribution lines are currently the most extensive network infrastructure, and it has a solid foundation, which has higher reliability than other networks such as telecommunications and radio and television networks. Therefore, how to make full use of the unique network resources of the power system is an important subject that people have been studying for a long time.

1. Composition and characteristics of electric power communication network

The power communication network is composed of optical fiber, microwave and satellite circuits.The main lines make full use of the power line carrier, special optical cable and other unique communication methods of the power system. Multi-user, multi-functional integrated communication network composed of switchboard and other equipment. 1. Several main ways of power communication.

1. 1 Power Line Carrier Communication

Power lines are mainly used to transport power-frequency current. If the voice and other information are converted into high-frequency weak current through the carrier machine and transmitted through the power line, this is the power line carrier communication, which has unique advantages such as high channel reliability, less investment, quick results, and synchronization with the power grid construction. In addition, there are methods such as insulated ground wire carrier that uses the power line overhead ground wire to transmit the carrier signal in power line carrier communication. Compared with the ordinary power line carrier, the insulated ground carrier is not affected by the power failure maintenance or the ground fault of the transmission line, and the ground wire is insulated to reduce a large amount of power loss.

1.2 Optical fiber communication

Because optical fiber communication has many advantages such as strong anti-electromagnetic interference ability, large transmission capacity, frequency bandwidth, and low transmission attenuation, it was first applied and rapidly developed in the power sector. In addition to ordinary optical fibers, some special special optical fibers are also widely used in power communications.

1. 3 others

There are also traditional open-line telephones, audio cables, and emerging spread-spectrum communications in the power communications network.

2. Characteristics of power system communication

Compared with the public communication network and other private networks, the characteristics of power system communication are mainly as follows: high reliability and flexibility are required; the amount of transmitted information is small, the type is complex, and the real-time is strong; it has a great resistance to "impact" The network structure is complex; the communication range is multi-faceted; the unattended computer room is mostly.

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