WSN-based efficient monitoring for overhead transmission line in smart grid

The grid security has become a popular topic in both academia and industry. The efficient monitoring of overhead transmission line is particularly important. This paper focuses on monitoring network design for overhead transmission line in smart grid by using wireless sensor network (WSN). For this purpose, a large number of nodes are deployed along the overhead transmission line, which collect and send data periodically. To make the data transmission to the control center in timely and effectively manner, some certain relay nodes are chosen to install cellular modules which are usually expensive. A novel model is proposed which considers the network cost and transmission delay simultaneously, and then the deployment problem of cellular modules in the actual operation can be transformed into an integer liner programming (ILP) problem, so that the optimal number and location of cellular modules can be determined. The objective function can be obtained through weighted stack of normalized network cost and transmission delay. There is a tradeoff between network cost and transmission delay, which can be determined according to the different requirements of users. The numerical simulation results show that the solution can reduce the transmission delay and control cost effectively.