With the progress of society and economic development and the expanding deployment scale of substations, the automatic monitoring of the foundation settlement in construction station becomes an important issue of the operation and maintenance in the power grid. BeiDou satellite navigation system is a global navigation and positioning system, which is independently developed to provide navigation, positioning, and timing services in China and its surrounding areas. This article describes the principles of BeiDou high-precision positioning. According to the land subsidence monitoring and warning requirements for substations, multi-antenna technology is introduced in order to solve the problem of the cost of large-scale land subsidence monitoring system. The monitoring interface software is designed to visually reflect the settlement situation. The monitoring system can effectively improve the monitoring efficiency and early warning capability of the ground subsidence in the power company’s substation. The system will also provide a basis for decision-making management and improve the reliability, safety, and stability of power grid operation based on high-precision field accuracy and trend.
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