FBG Displacement Sensor Application Research on Geology Security Monitoring of Substation

The great area crack can cause the landslide of the substation sliding. Dislocation is the significant factor to reflect the crack. Embedded the mast structure of FBG displacement sensor, the relative displacement of retaining wall in YanJin substation can be obtained. Placed 3 FBG displacement sensors on the southeast corner of the substation downstream integrated the real-time monitoring system for the dislocation crack of YanJin substation downstream. In the monitoring results of the 479 days, daily average displacement of 3# sensor located in substation downstream maximized to 1.58mm on January 27th 2011; and daily average displacement of 2# sensor located in substation downstream minimized to -1.94mm on September 18th 2011. The monthly rainfall maximized to 123.5mm, 70.7mm, 75.9mm in July, August, September 2011 and minimized to 26.8mm, 12.9mm, and 23.3mm in January 2011, November, December 2010. Considered local precipitation, cracks closely related to the local precipitation.