AT1 Transformer at Gia Lộc 220kV Substation – Photo: EVNNPT
The energization of this project marks a significant milestone for EVNNPT, celebrating the success of the 1st National Congress of the Government Party Committee for the 2025-2030 term, held on October 12-13, 2025.
Prior to this, on October 7, 2025, the Investor’s Acceptance Council, chaired by EVNNPT’s Deputy General Director Hoàng Văn Tuyên, unanimously approved the project’s energization.
The Gia Lộc 220kV Substation and its connecting transmission line project is spearheaded by EVNNPT, with project management overseen by the Northern Power Projects Management Board and operational handover to Power Transmission Company 1.
Classified as a Group B, Level I energy infrastructure project, the Gia Lộc 220kV Substation is located in Gia Khánh Commune, Gia Lộc District, formerly part of Hải Dương Province, now integrated into Gia Lộc Commune, Hải Phòng City. The transmission line spans Gia Lộc Commune, Gia Phúc Commune, and Thạch Khôi Ward in Hải Phòng City.
The project includes the construction of the Gia Lộc 220/110/22kV Substation, designed for three 220/110/22 kV-250 MVA transformers. In this phase, two 220/110/22kV-250MVA transformers are installed.
The 220kV section features a 16-bay design with a double busbar and busbar ring configuration. This phase equips 8 bays, reserving space for an additional 8 bays.
The 110kV section includes a 24-bay design with segmented double busbars and a busbar ring. This phase installs equipment for 14 bays, reserving space for 10 bays. The 35kV section connects to the local grid for auxiliary power supply.
Control, protection, measurement, communication, and SCADA systems comply with EVN and EVNNPT regulations, adhering to electrical equipment standards and current guidelines.
The transmission line component involves constructing a four-circuit 220kV line from the Gia Lộc 220kV Substation, interconnecting with two circuits of the Hải Dương – Phố Nối 220kV line, spanning approximately 5.37 km.
Project execution faced challenges due to frequent storms in the region and resource constraints as contractors juggled other critical power sector projects. However, with close supervision from EVN, EVNNPT, and NPMB, contractors mobilized resources in the final stretch to ensure project completion.
Upon completion, the project will enhance power supply reliability for Hải Phòng City, supporting its socio-economic development and neighboring areas. It will reduce load on existing 220/110 kV transformers in Hải Phòng and adjacent provinces, ensuring N-1 compliance and bolstering grid safety and reliability.
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