Design And Research Of Smart Grid Electric Energy Information Acquire System Based On Embedded

With the deepening of the research on smart grid,the electric energy information acquire system is integrated with various power grid automation systems to realize the full coverage and full acquisition of power users on the power grid main station platform.This paper designed smart grid electric energy information acquire system by using the embedded technology,based on uC/OS-III and Linux operating system,and the reliability of data transmission was verified by OPNET network simulation software.The paper based on the analysis and research of domestic electric energy information collection system,the main problems in the current system are as follows: The terminal hardware function is few,the performance is poor;The number of service objects is small and only for specialized users;The overall safety factor is low;Communication modes are few and inefficient.In view of the above problems,this paper studied,designed and proposed the solutions.High performance processors,metrology chips and memory,external mass memory are used in the design of terminal hardware,collect the electric energy information of the user in real time,possessed prepayment,alarm,trip and payment function,covering both general and special users,the service object type is relatively wide,the quantity is relatively big.The system designed in this paper has high security performance,in the collection terminal and concentrator hardware,the AES-128 algorithm is used to encrypt,once stolen,the data will not be read.The hardware is equipped with alarm light,if an emergency occurs,such as failure,automatically report to the main station and alarm.The concentrator carries on the harmonic analysis to the collected related data,monitor the harmonic content of the system in real time and feed back to the master station.The main station sets up the network separately and uses firewall to isolate it from the external communication network,the database server adopts "SDAS" dual-engine storage structure at the same time,when the main engine fails,the standby engine starts itself and does not interfere with normal business processes.The TD-LTE wireless private network is adopted as the communication mode,make full use of its empty opening safety layer,NAS signaling security layer and multilevel authentication between layers,ensure the security of data transmission.The acquisition terminal can access the carrier meter RS485 meter,Ethernet meter and other intelligent watt-hour meters,the system is matched with various communication modes to complete the uplink and downlink communication,include power line low-voltage carrier RS485 bus,micro-power wireless TD-LTE wireless private network WLAN and special optical fiber in the system,it has high communication efficiency and flexibility.