Research And Implementation Of FPGA Image Processing For Substation Surveillance System

In recent years,with the continuous advancement of the construction of intelligent substation in State Grid Corporation,more and more control and information services in power grid need to be transmitted through power communication equipment.Higher requirements are also put forward for the operation and maintenance level of related power communication equipment in substations.Because the safety regulations of the State Grid Corporation clearly stipulate that the power communication equipment can not be monitored through the Internet,it has to be monitored indirectly through the video monitoring platform.At present,the unified video surveillance platform operated by the State Grid Corporation is mainly set up for primary electrical equipment,and there is no professional surveillance platform for communication equipment in the computer room.Therefore,there is an urgent need for a video surveillance system specially designed for the monitoring of communication equipment to help communication operators achieve remote real-time monitoring of a large number of power communication equipment.To meet the above requirements,this paper designs and studies an image processing algorithm based on FPGA(Field Programmable Gate Array)for substation surveillance system.By analyzing the status panel and operating environment characteristics of the electric power communication equipment in operation in the current electric power communication network,The design principle and function index of the algorithm are summarized.Furthermore,the FPGA is used to monitor the LED(Light Emitting Diode)of the communication equipment panel to realize the monitoring of the working state of the equipment.Finally,using the technology of FPGA,the status monitoring of LED in the communication equipment panel is realized in the dark light environment of the communication room.At the same time,video images and monitoring results are displayed by the upper computer software,and finally the automatic determination of the running state and fault of power communication equipment in the design target is realized by combining LED light state logic.Aiming at the main research content of LED recognition of communication equipment,this paper proposes two ways to design and implement it.One is to count the rows and columns that satisfy the set threshold condition for each frame pixel in the transmitted image data,and then convert the final column pixel count value into the LED monitoring result according to the conversion relationship;another method is to directly count the pixels satisfying the color threshold in the image data frame,and output the detection results according to the conversion relationship between the pixel statistics and the LED.By comparing the two detection methods,the conclusion is drawn.The second method has higher detection accuracy and better stability.The correct and stable output of the recognition result of LED is obtained by the second detection method.In addition,based on C# programming language,the main conversion code of the host computer result display software is designed,which achieves the design goal of the host computer visual display.Finally,combined with the LED light state logic of the power communication equipment,the automatic determination of the running state and fault of the power communication equipment is realized.This paper makes an exploratory attempt on the application of FPGA in the monitoring of the operation status of power communication equipment,and puts forward a research idea and implementation scheme of realizing the monitoring of the operation of communication equipment through the state detection of LED.Designs and implements a monitoring algorithm of power communication equipment based on FPGA,which has positive significance and reference value for the research of the field of power system monitoring based on FPGA.