UHV transmission line online monitoring system scheme
Because UHV transmission lines extend vertically and horizontally for tens or even hundreds of kilometers, they are in different environments. Therefore, high-voltage transmission lines are greatly affected by the geographical environment and climate, and the annual power outages of the power grid are mainly caused by line accidents.
Traditional transmission line inspections mainly rely on periodic inspections by operation and maintenance personnel. Although hidden equipment hazards can be found, due to their own limitations, they lack detection of special environments and climates. During the vacuum period of the inspection cycle, it is difficult to grasp the external force changes in the line corridors. Before the next patrol, a line accident occurred due to lack of monitoring.
Therefore, the application of online monitoring system for UHV transmission lines was born.
System principle
The UHV transmission line online monitoring system organically integrates wireless sensor technology and wireless high-speed transmission technology, and transmits various data and video information of the transmission line to the monitoring center through the DTU . Real-time monitoring of line conditions such as anti-theft alarm and icing has greatly improved the accuracy of online monitoring of UHV transmission lines and the intelligent level of decision-making and disposal.
System composition
The UHV transmission line monitoring system is mainly composed of three parts: the front-end acquisition layer, the network transmission layer, and the monitoring center.
1. The
collection front end of the collection layer is a high-performance data collection host. Its main power supply is a solar panel. It analyzes and collects various surrounding data, such as temperature, humidity, wind direction, etc., through a preset program. Video The probe can continuously monitor the surrounding environment in real time.
2. Transmission layer The
front-end system processes the data collected by various sensors, detectors, and cameras, and transmits it to the monitoring center through an industrial-grade DTU using a 4G/5G wireless network at a high speed. Industrial-grade DTU has industrial-grade varieties, super-strong moisture-proof, lightning-proof, and anti-electromagnetic interference ability to adapt to various harsh environments.
3. Monitoring center The
monitoring center is the "brain" of the system, which is composed of a server unit and a platform software master.
The central monitoring system performs various analyses on the data and makes relevant operations, such as issuing alarm messages. Various online monitoring data, images, videos and the location of emergency vehicles can be visually displayed on the large screen, so that the monitoring personnel can monitor the equipment operation in time, accurately judge the equipment status and on-site conditions, and direct the vehicles and professionals to deal with various Overhaul and emergency repair of transmission lines.
Subsystem function
1. Anti-external monitoring system
It has the function of early warning of external force damage through the anti-external laser scanning detector and anti-external high-definition camera. It can carry out laser detection and early warning of ultra-high vehicles and ultra-high construction machinery that exist in areas such as transmission lines crossing roads and constructions around the clock, and take pictures and videos in parallel to fully realize the monitoring, analysis and early warning of the task of preventing external damage to the transmission line.
2. Pole and tower tilt online monitoring system The
pole tilt sensor sends the collected data such as the horizontal tilt, longitudinal tilt and compound tilt of the pole and tower to the monitoring center through the 4G wireless network. The monitoring center analyzes the tower's own design parameters and completes the multi-parameter of the pole and tower tilt. Early warning function. The development trend of the tower tilt can be judged in time, and it can be dealt with in time when the alarm state is reached.
3. Video online monitoring system The
image video monitoring unit takes picture and video monitoring as the core. The front-end industrial high-definition camera always pays attention to the potential safety hazards under the transmission line. The image and video information will be automatically pushed to the monitoring center through the set time interval, and the staff can Check the transmission line for hidden dangers such as illegal operations anytime and anywhere, to ensure the truthfulness of the information, and greatly reduce the work intensity of line inspectors.
4. The
image and video monitoring unit of the anti-hill fire monitoring system can perform 360° panoramic monitoring of the surroundings. At the same time, the equipment's multi-spectral radar detection technology can monitor the smoke and fire around the transmission line in real time. If an abnormality occurs, the line supervisor can use the mobile phone , Computers and other equipment receive wildfire warnings, realizing high-frequency wildfire monitoring throughout the entire period.
5. Micro-meteorological monitoring system. The
micro-meteorological sensor is based on a multi-parameter measurement meteorological sensor. It integrates the measurement of wind speed, wind direction, temperature, humidity, atmospheric pressure, and rainfall. It does not require maintenance and on-site calibration, and realizes the real-time detection and perception of the entire region. , Timely grasp the climate change law of the line operating environment in order to take corresponding measures.
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