Overnight repair of 220kV and 500kV power grid after storm in Quang Ninh

Accordingly, due to the impact of v, it made landfall in Quang Ninh - Hai Phong, with the strongest wind near the storm center at level 11-12 (103-133 km/h), gusting to level 15, causing serious damage to the national power transmission grid in the area the storm passed through.

Position of pole 15-16 of the 220kV Trang Bach - Uong Bi line collapsed due to the storm (Photo: PTC1)

Power Transmission Company 1 (PTC1) said: The storm caused problems for 09 500kV lines, 34 220kV lines, causing complete power outages at 02 500kV transformer stations and 08 220kV transformer stations.

To ensure the power supply to the loads is restored, PTC1 has mobilized the total force of the Northeast Power Transmission 1 and Northeast Power Transmission 2 units, increasing the number of officers and workers at Power Transmission. Ha Noi and Northeast Power Transmission 3 participated in troubleshooting.

Damaged wire treatment is about column 19-20 of 500kV line of Thang Long Thermal Power Plant - Quang Ninh (Photo: PTC1)

As expected, this morning, the MC272 Dinh Vu transmission cabinet of the 220kV Dinh Vu substation will complete troubleshooting work to put into operation.

The 500kV line of Thang Long Thermal Power Plant - Quang Ninh has many line anchors damaged by storm No. 3 (Photo: PTC1)

Along Highway 18 Chi Linh (Hai Duong)- Quang Ninh, the 220kV Trang Bach-Uong Bi line was severely damaged, at 15-16 locations, electric poles fell and broke, many sections of the line were almost severed, transmission workers had to work hard in the rain and wind, all night to handle the incident.

Location of 15 broken and collapsed 220kV Trang Bach - Uong Bi lines due to storm No. 3 (Photo: PTC1)

Other items are being repaired and fixed to resume operation soon.

Specifically at Dong Hoa 220kV substation: AT1 transformer has 03 damaged 110kV porcelain type COT 550-1600A, damaged 01 damaged neutral porcelain type COT 325 - 1000A, 06 broken 220kV and 110kV pole clamps and the transformer is missing about 4-5 tons of Hyvolt III oil - USA. This item is expected to take about 5-10 days (around September 14 - September 9) to restore the transformer.

For the 2 CSVs with broken rudders, the repair work is expected to be completed on September 10.

The entire porcelain bowl of position 16 of the 220kV Trang Bach-Uong Bi line was broken (Photo: PTC1)

The 220kV and 110kV AT1 transformer's porcelain chain accessories have broken wires and broken insulators. Repairs are expected to be completed by the evening of September 10.

Particularly, the 500kV Quang Ninh substation, due to the impact of the storm, broke 10 500kV DCL and the 220kV transformer is currently being restored.

By the morning of September 9, PTC9 had successfully restored 1 10kV lines and 500 28kV lines, including important lines such as:

It is expected that on September 9, 9, 2024 more lines will be restored after completing safety inspections.

The incident of a corrugated iron roof flying up to the conductor at pole 42-43 of the 500kV Pho Noi-220kV Pho Noi substation (Photo: Le Quynh)

Mr. Dinh The Hung - Deputy Director of Hanoi Power Transmission, PTC1 said: Due to the impact of the storm Yagi blew off the corrugated iron roof of My Hao bus station with an area of ​​about 300 mXNUMX² pressing on the conductor around column 42 - 43 of the 220kV line 276T500 Pho Noi - 271, 272 T220 Pho Noi, the line managed by Northeast Power Transmission 2.

Hanoi Power Transmission mobilized 30 officers and workers to support Northeast Power Transmission 2 to handle the incident (Photo: Le Quynh)

After receiving the dispatch order from Power Transmission Company 1 to support incident handling; after checking and surveying the scene, Hanoi Power Transmission arranged construction tools and increased the number of people to handle the problem. The unit increased the wire anchors to avoid them from flying up, used cranes to hold and cut the iron roof trusses. By 30:16 p.m., the line was completed and returned to Dong Bac 2 to restore the grid.

Hanoi Power Transmission has increased equipment to speed up processing progress (Photo: Le Quynh)

Meanwhile, to strengthen troubleshooting in the Quang Ninh area, Northeast Power Transmission 3 has also increased 22 officers and workers to support the repair of items damaged by the storm at the 500kV Quang Ninh substation and the 220kV Trang Bach - Uong Bi line.

By the evening of September 8, the incident handling and troubleshooting work was completed (Photo: Le Quynh)

Currently, PTC1 has mobilized 100% of its available human resources and resources to focus on troubleshooting immediately after the storm ends. At the same time, units continue to be directed to closely monitor unusual weather developments to promptly detect and remedy impacts on the power grid.