2021年10月26日

Shanxi ultra high voltage line 72 hours “rush to repair battle” : in mud, in water

Taiyuan October 13, the topic: Shanxi ultra high voltage line 72 hours “rush repair war” : in the mud, in the water

The author is Gao Yuqing du Heng

72 hours in the mud, in the water.

Under the influence of continuous rainfall, the safety risk level of super high voltage power supply equipment in Shanxi has been raised again. After the “power personnel” worked for dozens of hours continuously, the repair of the 500 kv Yujiu second line has been completed.

In early October, Shanxi experienced the heaviest autumn rainfall since meteorological records began. The average rainfall in Shanxi reached 119.5 mm between 20 am On Oct 2 and 8 am on Oct 7, more than three times the average monthly rainfall in October, the provincial meteorological Bureau said.

Debris flow, mountain landslide and other disasters caused by rainfall bring serious hidden dangers to the safe operation of the ultra-high voltage transmission line equipment of Shanxi Electric Power Company of State Grid.

As of 20 o ‘clock on October 6, more than 100 transmission equipment of shanxi Electric Power main network were affected, but no faults occurred. And because of the storm brought security risks, but can happen at any time.

At 20:40 on the 6th, in the wechat control group of line safety of the Transmission Maintenance Branch of Shanxi Electric Power Company of State Grid, Li Shuping, the line guard, reported the news that “the rain stopped in no. 40 to no. 58 section of yujiu Second line of 500 kV”; At 20:50, Fan Xia, on duty in the monitoring room, saw no abnormality in the background rotation; At 21:08, scheduling duty officer Zhang Yuanyuan answered the provincial telephone: “500 kv Yujiu second line fault trip, overlapping jump……”

At 23 o ‘clock on the same day, inspectors Wei Feng, Duan Xiaopeng in the company transport inspection department, safety supervision department and branch of the notice, rushed to Wuxiang County Zhongnan ditch village 500 kv Yujiu line 43 outside 100 meters. In the night under the emergency light column, they see, Yujiu second line 43 tower has been seriously tilted, while patrol road was destroyed by water.

“Organize manpower and material resources, go all out to complete emergency repair as soon as possible!” “Said Shen Qingbin, general manager of the company. At the same time, from 6:00 to 10:00 on The 7th, the equipment Department of Shanxi Electric Power Company of State Grid, Shanxi Power Transmission and Transformation Engineering Company of State Grid, Shanxi Electric Power Survey and Design Institute of CNPC and other relevant personnel arrived successively. On October 10, relevant experts from China Institute of Electricity Science and Technology arrived at the fault area for guidance.

国网山西省电力公司输电检修分公司抢修人员在500千伏榆久二线开展铁塔倾斜抢修工作。 李杰 摄
Emergency repair personnel of Transmission Maintenance Branch of State Grid Shanxi Electric Power Company carried out emergency repair of tower tilt in 500kV Yujiu second line. Li jie is taken

“The difficulty of emergency repair is more than expected.” Dong Kai, deputy general manager of the company, said the difficulties mainly focus on several aspects: roads washed out resulting in difficulties for large machinery to enter; The landslide disaster is serious, and the emergency repair is difficult; Due to geological landslide, cable position, tower height and other factors, the stability of emergency repair tower is worrying…… Faced with so many difficulties, how to cope?

“The people for the people, the more difficult the more forward!” 7, state grid Shanxi Electric Power company power transmission overhaul branch party secretary Xue Zhihong said.

“500 kv Yujiu second line has been turned maintenance, permission to start!” At 15:16 on the same day, yujiu second line “rush repair battle” officially started, the scene of more than 70 rush repair personnel orderly rush repair operations.

In the meantime, part of the emergency repair personnel in the segmented layout of emergency repair tower parts; Two excavators continue to carry out excavation work; The personnel working at height shall work on the tower and remove the guide ground of the faulty tower.

On the other side, a group of inspectors in red vests stand out. “After the failure of yujiu second line, we should strengthen the inspection work of Yujiu first line to ensure the safety and stability of the line from Yushe station to jiu ‘an substation.” Shi Bin, head of the company’s inspection squad, said, “It’s nothing to stay for two days and two nights in a row. It’s our responsibility to keep going through the rounds no matter how hard we are.”

From 6 o ‘clock on The 8th to 0 o ‘clock on the 9th, intermittent rain fell on the site of emergency repair. The emergency repair personnel dismantled wires, dug ground anchors and set up emergency repair towers in the rain, and all the work was carried out orderly.

At 11 o ‘clock on the 9th, the emergency repair tower group was completed, and by 20 o ‘clock, the installation of grounding wire and accessories was completed. At 11:50 on the 10th, the rush repair work was completed. After nearly 72 hours of fierce battle, 500 kV Yujiu line is electrified.

It is understood that during the heavy rainfall, its Shanxi Province electric power company power maintenance branch control room, take a 24-hour monitoring wheel round, each division 30 inspection team in the entire province 149 super () key segment in waiting for high voltage transmission lines, 58 vehicles of out every day, staff 1229 people, more than 27000 (times), remote monitoring All-out efforts will be made to investigate potential flood hazards. (after)

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