关键词: 智能电网, 无线传感器网络, 智能电子设备, 存储模型, 分层扩展存储机制

Abstract: Concerning that the monitoring data in large-scale smart grid are massive, real-time and dynamic, a new data storage approach supporting large-scale smart grid based on data-centric was proposed, which is a hierarchical extension scheme for storing massive dynamic data. Firstly, the extended Hash coding method could adjust the number of storage nodes dynamically to avoid data loss of sudden or frequent events and increase system availability. Then, the multi-threshold leveling method was used to distribute data to multiple storage nodes, which could avoid hotspot storage problem and achieve load balance. Simulation results show that this method is able to satisfy the need of massive data storage, to obtain better load balance, to lower the total energy consumption and to extend the life cycle of the whole network.

Key words: smart grid, Wireless Sensor Network (WSN), Intelligent Electronic Device (IED), storage model, hierarchical extension storage scheme