中文摘要：

鉴于WSN技术的不断发展以及智能电网中架空输电线路监测的迫切需求,提出一种基于WSN的架空输电线路监测的混合网络结构。选取某些中继节点安装蜂窝模块,实现中继节点与控制中心的直接通讯,从而降低了传输数据产生的时延。考虑到蜂窝模块较高的安装和运营成本,需对其安装数量进行优化。在综合考虑时延和成本的情况下,将蜂窝模块的安装问题转化为整数线性规划（ILP）问题,通过求解可得到蜂窝模块的最优数量。数值仿真表明,该方案能实现监测的实时性及经济的有效性,能满足智能电网实时性和可靠性要求。

英文摘要：

With the continuous development of WSN technology and the urgent demand for the monitoring of overhead transmission lines in smart grid, the paper proposes a hybrid network structure based on WSN for monitoring the overhead transmission lines. Cellular modules are installed on some relay nodes to realize direct communication between the relay nodes and the control center, and thereby the delay of data transmission is reduced. Considering expensive installation and operating costs of the cellular modules, it is necessary to optimize the number of the cellular modules needed to be installed. So, these two facts taken together, the delay and the cost, the deployment problem of the cellular modules is transformed into an integer linear programming （ILP） problem, and the optimal number of the cellular modules can be obtained by solving the issue. Numerical simulation shows that this scheme can realize real-time monitoring with economic effectiveness, meeting the needs of both the real-time and the reliability for smart grid.