Typhoon No. 3 caused significant damage to the power transmission grid in Quang Ninh province, affecting a 500kV line and four substations. All 220kV lines experienced outages. Thanks to the tireless efforts of Northeast Power Transmission Company 1, the incidents have been largely resolved, promptly restoring the production activities of power plants and quickly resuming power supply to industrial, commercial, and service loads in the key economic region of Northern Vietnam.
The Northeast 1 Power Transmission Company currently manages 6 substations (1 x 500kV and 5 x 220kV) with a total capacity of 3,200 MVA and 38 transmission lines: 10 x 500kV and 28 x 220kV lines. These are all power transmission lines from thermal power plants in Quang Ninh, Hai Duong , and Son Dong thermal power plant (Bac Giang) to the national transmission grid. However, due to the unique topography, approximately 75-80% of the transmission grid in the Quang Ninh area passes through high mountainous regions, leading to significant damage from storms and making restoration work extremely difficult.
Mr. Pham Minh Khoi, Deputy Director in charge of the Northeast 1 Power Transmission line, said: "Recognizing the potential for significant damage from the storm, from September 6th onwards, all personnel of Northeast 1 Power Transmission, along with 120 people from 5 other power transmission units, were mobilized to ensure 24/7 readiness at the substations. After the storm subsided, the unit immediately divided into teams to inspect the power lines and identify any damage requiring repair. The unit focused on addressing the 500kV line. At 1:00 AM on September 9th, the technical staff withdrew from the poles after completing the final maintenance at approximately poles 19-20 of the Thang Long Thermal Power Plant to the Quang Ninh 500kV substation line, restoring the grid to the national dispatch center."
With the spirit of resolving the problem as quickly as possible to restore critical power circuits, Northeast Power Transmission Company 1 mobilized its workforce in three shifts, organizing construction 24/7. As of September 13th, all affected 220kV and 500kV substations have been fully restored, equipment is operating normally, and the wiring diagrams have been restored to their pre-typhoon No. 3 state. This has enabled timely connection and relief of power from Son Dong Thermal Power Plant (Bac Giang) and Uong Bi Thermal Power Plant, as well as supplying electricity to important industrial loads in Quang Ninh province, allowing businesses to resume production.
At the Yen Hung 220kV substation, one transmission line bay and one transformer have been restored, while the remaining transformer is ready to energize and awaiting restoration orders. Regarding the Trang Bach - Yen Hung 220kV line, due to the severe impact of strong winds and storms causing the collapse of two poles (in Uong Bi City), since September 8th, the Northeast 1 Power Transmission Company has mobilized all its forces and received support from emergency response units of provincial and city power transmission companies to urgently re-erect the two poles and pull the wires to restore power. It is expected that the Trang Bach - Yen Hung 220kV line will be re-energized and put back into operation on September 18th.
Alongside its own repair work, the company has also actively supported other units in the power industry. For example, with Uong Bi Thermal Power Plant and Thang Long Thermal Power Plant, the company has assisted in replacing surge arresters, current transformers, and outgoing jumper wires on the 220kV Uong Bi - Yen Hung and Uong Bi - Trang Bach transmission lines…
The 220-500kV power transmission grid in the Northeast region is connected to numerous thermal power plants in Quang Ninh, such as Mong Duong, Cam Pha, Quang Ninh, Mao Khe, and Uong Bi thermal power plants. The early resolution of incidents by the Northeast 1 Power Transmission Company has ensured the readiness to evacuate the power output of these thermal power plants, making a significant contribution to ensuring the safety and security of electricity supply for the national system.
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