What appears to be ordinary ice and snow is actually an “invisible killer” that threatens the safety of power lines.
The Multiple Hazards of Ice Accumulation on Power Transmission Lines
1. Increased Load on Power Lines: Ice accumulation significantly increases the weight of power lines. When this weight exceeds the line’s load-bearing capacity, it can easily lead to conductor breakage, tower tilting, or even collapse. This not only causes localized power outages but may also trigger a chain reaction of failures, severely disrupting residents’ daily lives and business operations.
2. Reduced Insulation Performance: When ice and snow melt, they form a film of water on the conductors, which significantly reduces the line’s insulation performance. This can easily lead to issues such as flashover and short circuits, causing circuit breakers to trip and power outages, and affecting the stable operation of the power grid.
3. Causes Conductor Flutter: Uneven ice buildup can cause conductors to flutter, increasing the risk of collisions between them and thereby triggering outages. Furthermore, conductor flutter prolongs emergency repair times and creates greater challenges for power system operation and maintenance.
4. Increased Operational and Maintenance Difficulties: Heavy snowfall can hinder routine inspections, making it difficult to identify potential hazards in a timely manner. Once a failure occurs, emergency repair crews must work in extremely cold and hazardous conditions, resulting in low efficiency and safety risks. At the same time, emergency repairs and restoration efforts require significant investments of manpower, material resources, and financial resources, significantly increasing operational and maintenance costs.
Principles of the Dingxin Smart Technology Ice Accumulation Monitoring System
Dingxin Smart Technology’s Icing Monitoring System (Tension Sensor Type) DX-WPS100-FB uses resistive strain gauges configured in a Wheatstone bridge to measure the stress applied to the sensor by detecting the strain in the elastic body. The system features a compact design, high measurement accuracy, and strong resistance to offset. It incorporates a column-type tension sensor into a ball-head suspension ring configuration, replacing the original ball-head suspension ring. Installed between the insulator string and the crossarm, it can directly measure the combined load on the conductor, enabling highly reliable, real-time online monitoring of icing zones.
1. Comprehensive Data Collection: The terminal is capable of collecting data on a variety of parameters, including insulator string tension, relative tilt angle, ambient temperature, relative humidity, wind speed, wind direction, terminal power supply voltage, mobile communication signal strength, and on-site ice condition images. Data can be collected either automatically or on command, and the scope of data collection meets the relevant requirements of the China Southern Power Grid Transmission Line Condition Monitoring System communication protocol.
2. Data Processing and Storage: The system features data validity checking and analysis capabilities, enabling it to automatically identify and filter out erroneous data to ensure data accuracy. Additionally, it can compress images using a standardized algorithm and store more than 90 days’ worth of acquired data and status data in a循环 manner, facilitating subsequent data analysis and queries.
3. Remote Command Response: The system can dynamically respond to remote commands such as time queries/settings, data requests, and reboots. It can also modify information such as sensor sampling frequencies, sampling intervals, and network adapter addresses based on remote commands, making it convenient for administrators to remotely control and adjust the system.
4. Security and Self-Testing Functions: The system features identity authentication and remote software upgrade and update capabilities, with a comprehensive update mechanism and process. In addition, it performs periodic self-tests to detect defects and outputs self-test results. With the integration of a security chip, it can encrypt data and connect to provincial company platforms, ensuring data security and system stability.
