Design and implementation of a wireless node for advanced sensor processing and network integration
Rohit Kale, Nripendra Kumar Singh, Hadi Alasti, Asis Nasipuri, Robert W. Cox, James M. Conrad, Luke Van der Zel, Bienvenido Rodriguez, Ralph McKosky, Joseph A. Graziano · 2010
This paper presents the design and implementation of a portable base station for a wireless sensor network (WSN) for monitoring power substations. Apart from serving as the sink for all sensor data in the WSN, this node is also capable of high-speed data acquisition, image capture, and connection to the Internet via a cellular modem. In particular, we demonstrate its capabilities for performing high data rate voltage sampling for monitoring the health of transformer bushings from a power substation. Laboratory experiments demonstrate that the samples can be used to estimate phase differences with errors below 0.03° for 60 Hz voltage signals, which is lower than the requirement of a commercial transformer bushing monitoring system. Additional features of the advanced wireless node that are appropriate for substation monitoring applications are also described.