The Design And Implementation Of Head-End Backup Solution In AMI Scenario

With the growing complexity of power systems and constantly advancing of power system reform, traditional power network gradually transforms to the smart grid. The smart grid is a new kind of power grid, which uses cutting-edge power engineering, sophisticated sensing and monitoring technology, information technology and communication technology to improve the efficiency of network operation and support a wide range of additional services of the client. Through the using of smart meters, the Advanced Metering Infrastructure (AMI) is the basic information platform of the smart grid abling to measure, collect and analyze the electronic data of users, and offering two-way open communication. As an important service node in the AMI, Head-End is in charge of smart metering, data collection and so on. There are many kinds of and a large number of Head-Ends. Once the Head-End fails, it will greatly affect the operational efficiency of the smart grid, the continuity of the business as well as the reliability of power system.Selecting the Head-End in AMI as the research object, this thesis analyzes the handling of the Head-End failure aiming to develop a practical solution of Head-End backup and apply to the failure recovery of Head-End. As a result, it can reduce the fault handling time, improve the operational efficiency and lower the operating costs of the smart grid. This thesis presents a Head-End redundant backup solution, the "N+K" solution (N master Head-End, K slave Head-End). K slave Head-Ends consist of a cluster. When one of the N master Head-ends fails, the slave Head-end selected by the UMS will take over the work.. The main work included three parts as follow.(1) Through the analysis of the function of the Head-End in Advanced Metering Infrastructure, defining the position and the requirements of the Head-End and UMS in Head-End redundant backup solution.(2) Studying communication strategy of server cluster, using ZooKeeper cluster deployment to ensure the reliability and stability of communication between the Head-End and the UMS.(3) Considering the data synchronization requirements in the course of Head-End switching, Analyzing the type of synchronized data to make sure the integrity of data during Head-End failover.This thesis has completed detailed design and implementation of the Head-End redundant backup solution. Finally, this solution is proved effective and feasible by testing and analyzing. The testing results show that the Head-End backup solution showed in this thesis is applicable to scenario in AMI, and it increases efficiency, lowers the costs of Head-End failover with high stability and high reliability.