基于大规模智能电网网格结构的查询方法

Query algorithm based on mesh structure in large-scale smart grid

由于智能电网输电线路监测系统的查询多数是针对无线传感器网络(WSN)的全局式查询,不能满足用户基于任意区域的灵活高效的查询需求,根据该系统的网络布局和查询特点,提出了一种基于大规模智能电网网格结构的查询方法 MSQuery。MSQuery将不同网格内的查询节点的数据汇聚到一棵或多棵逻辑查询树上,采用逻辑查询树的合并策略建立优化的回收路径。将MSQuery与采用路线型结构进行查询的RSA算法和采用簇型结构进行查询的SkySensor算法进行对比,结果显示MSQuery的平均传输消耗最小,平均剩余能量最大。实验结果表明,MSQuery可以快速地返回查询窗口内的查询结果,降低通信消耗,节省传感器节点能量。

Currently, the query of transmission lines monitoring system in smart grid is mostly aiming at the global query of Wireless Sensor Network（ WSN）, which cannot satisfy the flexible and efficient query requirements based on any area. The layout and query characteristics of network were analyzed in detail, and a query algorithm based on mesh structure in largescale smart grid named MSQuery was proposed. The algorithm aggregated the data of query nodes within different grids to one or more logical query trees, and an optimized path of collecting query result was built by the merging strategy of the logical query tree. Experiments were conducted among MSQuery, RSA which used routing structure for querying and SkySensor which used cluster structure for querying. The simulation results show that MSQuery can quickly return the query results in query window, reduce the communication cost, and save the energy of sensor nodes.