Design And Implementation Of Power Grid Environmental Monitoring System

With the application of sensor technology and wireless communication technology,it provides an effective way and method for power grid environment monitoring.The data collected by the sensor is sent to the remote monitoring terminal through the wireless transmission system to control and analyze the large amount of monitoring data and realize remote real-time monitoring.Detailed analysis of the basic structure of the current monitoring,construct mathematical monitoring models,including ABC three-phase static coordinate system,two-phase static coordinate system and the D-Q model under synchronous rotating coordinate system,the current monitoring system was established based on ABC three-phase static coordinate system,the mathematical model can be calculated by solving differential equations of each variable law of change over time,the control of the power into the control of the electric current,exchange flow and to simplify the inner loop controller model,control links ignores the switch delay,factors such as sampling and filtering the delay link,through the control structure,The sampling delay of the signal is considered in three-phase ac current control.At the same time,the sending side adopts active power and reactive power control,while the receiving side adopts the control strategy of constant ac voltage and reactive power control.The outer ring adopts power control and voltage control,while the inner ring adopts current decoupling control.This paper introduces the detection node of the network environmental monitoring system,which USES digital sensors TS118,DHT11 and hall sensors to monitor the temperature,humidity and three-phase current of the equipment respectively.A monitoring terminal control system based on AT89C51 is composed of a single chip computer storage part,a wireless transmission receiving part and a display part based on 1602 A.Monitoring terminal according to the requirement of the grid monitoring center command of AT89C51 to control and sensors to collect data,under the Linux operating system of the A/D converter driver design and debugging,using PC communications technology,the monitoring to the power grid environment information through an asynchronous communication technology of wireless transmission to the monitoring center system,realized the image information acquisition,data collection and data transmission.Through the design of this system,the temperature and humidity around the commutator as well as the side current of the commutator,the side current of the commutator and the current when three-phase short circuit fault occurs are monitored.The controller has fast response speed and good control effect,and can achieve good control effect in different operation modes of the system.