Beidou+PS-InSAR Technology for Substation Geological Subsidence Monitoring and Early Warning Research

The normal operation of substation equipment requires higher ground settlement and differential settlement. This paper combines BeiDou high-precision positioning technology with InSAR technology, and proposes BeiDou+PS-InSAR technology to realize the monitoring of substation geological subsidence. This paper first uses BeiDou high-precision positioning technology to obtain the characteristic information of substation geological deformation displacement, and then analyzes the trend and law of substation geological deformation. Secondly, the phase of PS target is modeled and solved by using PS-INSAR technology, the nonlinear deformation, atmospheric delay and the phase of orbit error is separated by space-time filtering method. Finally, the deformation time series at each PS point can be obtained by superposing linear and nonlinear deformation. The BeiDou+PS-InSAR technology proposed in this paper can continuously monitor the high risk points of geological subsidence in substations in real time and give early warning when geological anomalies occur in substations.