Expansion joint posture monitoringThe system adopts low-power Internet of Things technology and edge computing technology to realize real-time collection, high-speed processing and reliable transmission of monitoring data to ensure accurate measurement of deformation; Optimize the human-computer interaction interface, improve operability, upgrade intelligent algorithms, and achieve fault warning and diagnosis. At the same time, the data is sent through edge IoT proxy devices to the power transmission and transformation equipment status monitoring system, IoT management platform, and equipment and channel environment status perception system for analysis and display, achieving unmanned inspection and improving the quality and efficiency of operation and inspection. The system improves the efficiency of GIS equipment operation and fault investigation. Including local monitoring, remote monitoring, and abnormal linkage, further standardizing construction work and improving the operation and maintenance level of urban power grids.

Expansion joint posture monitoringThe intelligent collection host is an on-site monitoring host that integrates the monitoring of the working status of displacement sensors, on-site temperature display (optional), alarm prompts and remote transmission, event recording and data recording. It can also modify the alarm threshold and other parameters of wireless displacement sensors on site. It can support communication such as IEC61850, 104, Modbus, etc., meeting various requirements for communication with backend software in various application scenarios.

At present, GIL/GIS equipment mainly consists of switches, current transformers, isolation switches, pipeline busbars, outlet sleeves, expansion joints and other equipment. Among them, the pipeline busbar is an important component of GIL/GIS, and its length is generally several hundred meters. The expansion joint of GIL/GIS equipment, as an accessory equipment of pipeline busbar, is mainly used for length adjustment compensation during installation of GIL/GIS equipment and compensation for the expansion and contraction of pipeline busbar tube with seasonal and environmental temperature changes after operation. The length of GIS pipeline busbar will vary with the change of environmental temperature. If the expansion joint of GIL/GIS cannot adjust and compensate for the expansion amount due to installation or manufacturing process problems, it may cause deformation and leakage of the connection part of the GIL/GIS equipment due to expansion stress, and seriously lead to insulation breakdown of the equipment. Currently, the vast majority of expansion joints are in an unmonitored state, which poses many safety hazards. The displacement monitoring of busbar tube expansion joints is achieved through manual observation and recording, which has the weaknesses of heavy manual workload, high labor cost, poor real-time performance, and low data accuracy. So, online monitoring of the status of expansion joints is an important project for the daily operation and maintenance of GIL/GIS equipment.