Real-Time Monitoring System for Local Subsidence Deformation in GIS Based on 3D Laser Scanning Technology

Gas-insulated metal-enclosed switchgear (GIS) is a crucial component of power systems; however, its stability is vulnerable to factors such as environmental temperature fluctuations, relative displacement between foundations, and ground subsidence. These factors can lead to equipment damage and performance degradation. Traditional monitoring methods are often time-consuming and inefficient. In recent years, 3D Laser Scanning Technology (3DLST), an emerging high-precision non-contact measurement technology, has demonstrated significant advantages across various fields. This paper proposes a real-time monitoring system for local subsidence deformation in GIS based on 3DLST. By employing a 3D laser scanner to capture GIS point cloud data, combined with data preprocessing and surface shape index analysis, the system enables dynamic monitoring of subsidence and deformation in GIS equipment. Its high accuracy and non-contact nature effectively address the limitations of traditional methods. Compared to conventional total station monitoring data, this technology shows a maximum deviation of 0.0015 mm, indicating excellent accuracy and stability that meet the 1 mm precision monitoring requirement. Additionally, relative to traditional leveling instrument monitoring data, this study significantly reduces monitoring time while facilitating GIS deformation monitoring, thereby demonstrating substantial application value and promising prospects for widespread adoption.