Design And Realization Of Distribution Substation Monitoring System

In order to realize the automatic monitoring and control of unattended power station,this paper studies the development of industrial acquisition and control system,analyzes the characteristics and advantages of field bus technology,and studies the principle and application process of Modbus protocol in detail.Further study of signal acquisition technology,signal transmission technology,modern alarm technology,human-computer interaction display technology.And then combing the signal involved in the monitoring,system function carding,a clear object of study and system design requirements.The hardware and software modules of the monitoring system are designed.The main modules and algorithms are described.At last,based on the communication instrument and controller based on Modbus protocol,unattended monitoring of substation is designed and realized.Management system ".The system can implement comprehensive centralized monitoring and query management for power station equipment,generator set,auxiliary equipment operation,and power station environment.Combining database technology and web programming technology,the system can realize remote query and query based on TCP / IP network.management.The system uses TCP Modbus gateway / RS485 bus network,design based on subscriber and publisher parallel acquisition algorithm to solve the multi-channel acquisition and distributed processing problem;the use of virtual instrument-based design to achieve the graphical management and use of the collector to provide a friendly and easy to use The user interface;the use of voice synthesis technology,telephone voice card programming,SMS cat reading and writing technology,to achieve the diversity of systems and remote alarm.The realization of monitoring system based on Modbus protocol is a specific application of the integrated management system of transformer substation.It has the characteristics of economy saving,unified standard,flexible deployment and strong expansibility.It has the popularization value in the actual production and application.,In the upgrading of the old system is a great reference.