Gprs Communication Technology In Distribution Automation Monitoring System

With the development of civil economy and the increasing of people's living standards,our demands to electric power supply will be more,our demands to the quality and reliability of power supply will be higher and higher.The technique of distribution automation system plays an important role in increasing reliability of power supply, extending power supply capacity and decrease the line loss,lightening labor intensity.Due to the development of scientific technology ,especial the development of computing technology, communication technology and artificial intelligence, the technique of distribution automation system has acquired great progress.The distribution automation system is a system which can supervise and control the distribution automation equipments, it is an application of computing science on power distribution automation system.This paper introduces an application of GPRS — a kind of network communication technology on distribution automation system through the achievement of load control system.The system uses the wireless communication fuction of GPRS ,it can achieve the remote-measuring, remote-communicating and remote-controlling the load control equipments.The system can gather three-phase voltages, circuits, active power, inactive power, power factor,electric energy data,etc.It can control switches remotely, can alarm when voltages and circuits exceed their limits.The paper mainly introduces the composition of the system,the fuction of the communication software and the background software.It proves the feasibility of GPRS applying distributed automation system through introducing the basic concept of distributed automation system ,the cognition of GPRS network and the analysis of GPRS composition modes.The remote terminals of this supervisory system communicates with supervisory centre by GPRS network.The communication software is a dynamic link library(dll),it is programmed by VC++ 6.0,We complement and modify the DL/T 645 protocol to form the communication stipulations of an agreement.It is constituted by sending command module, receiving data module, saving data module and alarming module.It can establish channels through supervisory center and terminals.The database is Microsoft SQL 2000 - a kind ofRDBMS,which will contend us.