Today, this group of people raced against time for nine consecutive hours for the safety of the city's main power grid.
On February 11, the second day of the Lunar New Year, a race against time for emergency repairs of power equipment was carried out under the 500 kV Fen 3 Line Tower in Pujiang Town, Minhang District, Shanghai.
"Close the 500 kV Fen three-line switch!" "Yes, execute!" At 16:00, after more than 40 staff members working continuously for 9 hours, State Grid Shanghai Electric Power Company successfully eliminated a crisis on the 500 kV Fen three line. Defects were detected and the equipment was restored to normal operation in a timely manner, ensuring the safe and stable operation of the city's main power grid during the Spring Festival holiday.
On February 10, the first day of the Lunar New Year, Chen Weijun and Shen Zhaoyu, staff members of the fourth shift of transmission operation and maintenance of State Grid Shanghai Electric Power Ultra-High Voltage Company, carried out a comprehensive special inspection of the important 500 kV transmission lines under their jurisdiction in accordance with the requirements for ensuring power during the Spring Festival. When the two patrolled near the first tower of the 500 kV Fen 3rd Line, they found that a ground wire was suspected to have a broken strand. They then used a drone to conduct a close inspection of the suspicious area. The footage returned by the drone showed that the A total of 7 strands of the wire were broken, and the strand breakage rate reached 36.8%.
"The main function of the ground wire of a transmission line is to protect against lightning and to protect the conductor, which is crucial for the safe operation of the line. Once the ground wire is completely broken, it will cause serious consequences of short-circuit fault tripping of the transmission line, so we pay special attention to the ground wire during daily inspections. Health status. "Considering that the Fen 3rd Line is an important line for external power to Shanghai, the situation is very urgent, and Chen Weijun quickly reported the critical defects discovered.
The power department immediately launched the emergency repair mechanism during the Spring Festival holiday, and immediately organized line professional and technical backbones to rush to the site to inspect the defective equipment and discuss the ground wire replacement emergency repair plan. At the same time, it arranged relevant substation operation and maintenance personnel and transmission operation and maintenance personnel to prepare accident emergency plans and implement them. Grid risk early warning and control measures will be implemented, and special inspections of relevant operating power transmission and transformation equipment will be carried out to ensure power supply.
At 7:30 on February 11, the emergency repair work officially began. At the emergency repair site, more than a dozen tools and equipment such as pulleys, motorized winches, and crimping machines were all in place. Under the leadership of the person in charge of the work, the personnel on the tower and the ground personnel worked together to complete the replacement of the relevant ground wires and tensile strength. Replacement of crimping pipes, hardware and anti-vibration hammers. Considering that there are many objects crossing below the line and the channel environment is relatively complex, the staff used a method of cooperating with wire sealing and high-altitude wire crossing frames, and added a high-altitude wire crossing frame on both sides of the important intersection as a second layer of protection.
With the full cooperation and close cooperation of the emergency repair personnel for more than 5 hours, the entire emergency repair operation ended successfully at 13:00. The staff then used drones to carefully inspect the newly replaced ground wires and other equipment, showing that everything was normal and met the power transmission requirements.
"Everyone of us is very happy to be able to eliminate equipment defects in time. To ensure power supply, for us, we are on call 24 hours a day and will be there wherever needed!" said Luo Haojun, the person in charge of the emergency repair site operation and State Grid Shanghai Electric Power High Voltage Industrial Co., Ltd.
It is reported that during the Spring Festival, professional staff of the State Grid Shanghai Electric Power Organization continued to conduct inspections of power grid equipment, strengthened the investigation and management of hidden equipment hazards, and implemented a 24-hour emergency duty repair system to ensure "uninterrupted" power supply and "no disconnection" during the Spring Festival. ” and service “never closing”, allowing the people of the city to spend a warm, peaceful and happy year.
