Cold cold cold! Recently, by the cold wave, most of China's experience "cross-seasonal" cooling, in addition to the Tibetan Plateau, the temperature throughout the drop of 8 to 12 degrees Celsius. Northwest China's eastern, western China, Huanghuai south, Jianghuai and Jiangnan and other places in the cooling range of 14 to 16 degrees Celsius, some areas of the daily temperature drop even more than 20 degrees Celsius.
Not only that, under the influence of cold air, many areas also received spring snow. The rolling hills are covered in silver, and the green of spring in the distant mountains, beautiful. However, the drastic temperature difference generated by the "spring cold" weather will lead to the surface of the transmission line is easy to condense ice, so that the local transmission line is at risk of ice cover. Once the thickness of ice cover exceeds the standard, it may trigger a surge in the mechanical load of the conductor, the arc droop increases, affecting the stable operation of the power grid.
In the face of unexpected weather, real-time tracking of transmission line snow development, focusing on mountainous areas and other cold sections of the transmission line to carry out investigation, timely detection of ice-covered hidden dangers, is to ensure the safe and stable operation of transmission lines is an important work. Based on this, our Shenzhen Dingxin Wisdom Technology proposed Transmission Line Equivalent Ice Covering Online Monitoring Device to respond to the program, through the "online monitoring + weather Early warning + intelligent analysis", to realize the line ice cover "visible, measured accurate", effectively improve the transmission line disaster resistance.
Visible and accurate
1. Visible
Ice-covering visualization: The transmission line equivalent ice-covering online monitoring device adopts high-definition variable-magnification PTZ dome, which has an all-around view angle, and is able to take real-time shots of line ice-covering and ice-covering conditions and send them back to the monitoring center to help the management personnel understand the line ice-covering status intuitively.
2. Accurate measurement
Tension/inclination monitoring: Measurement of insulator string tension value and insulator string relative inclination value by integrated tension/inclination sensor.
Meteorological monitoring: collect meteorological data such as environmental temperature, humidity, wind speed and direction through micro meteorological sensors.
These parameters can provide strong data support for calculating line equivalent ice cover thickness and predicting ice cover development trend.
"Visible, measured" is a key step in solving the problem of ice-covered transmission lines, and anti-ice anti-ice is focused on the "rainy day":
Transmission Line Equivalent Ice Cover Monitoring DeviceTransmission Line Equivalent Ice Cover Monitoring DeviceThe collected monitoring data is transmitted back to the monitoring center in real time through wireless network, and the data processing center utilizes the intelligent algorithm model to calculate the vertical component of the tension force through the insulator string tension force and inclination angle value, and at the same time combines with the measured ambient temperature, humidity, wind speed and wind direction to calculate the accurate ice-covering thickness of the conductor, and then calculates the ice-covering thickness of the conductor. The conductor ice thickness, and intelligent prediction of the future development trend of ice cover.
In addition, combined with the expert knowledge base and a variety of corrective theoretical models to give the ice forecast and de-icing strategy, the power company can be based on the ice forecast given by the system, combined with the weather changes to dynamically adjust the preventive and control measures, to realize the rainy day preventive ice disaster.
