Hai Phong city’s 220kV substation, transmission line ready for energization

The investor-level appraisal council of National Power Transmission Corporation (EVNNPT), a subsidiary of state utility Vietnam Electricity (EVN), on Tuesday agreed that the Gia Loc 220kV substation and its transmission line in Gia Loc commune, the northern city of Hai Phong meets the conditions for energization.

Attending the meeting were Le Van Cuong, deputy head of the EVNNPT Investment and Construction Management Board and standing member of the council; council members; representatives from EVNNPT's professional departments; leaders of the Northern Power Project Management Board (NPMB), and representatives of other units involved in the project.

The project is invested by EVNNPT, managed and operated by NPMB, and will be handed over to Power Transmission Company No.1 for operation.

This is a Grade-I, Group B energy industrial project. The substation is located in the former Gia Khanh commune, Gia Loc district, Hai Duong province (now Gia Loc commune, Hai Phong city). The 220kV transmission line passes through Gia Loc commune, Gia Phuc commune, and Thach Khoi ward, Hai Phong city.

The project includes the construction of the Gia Loc 220/110/22kV substation with three 220/110/22kV-250 MVA transformers. In this phase, two transformers are installed.

On the 220kV side, the substation is designed with 16 bays in a double busbar and ring bus configuration. In this phase, equipment is installed for eight bays, with space reserved for eight additional bays.

On the 110kV side, it includes 24 bays with a segmented double busbar and ring bus configuration. This phase installs equipment for 14 bays, reserving positions for 10 additional bays.

The 35kV side connects to the local grid for auxiliary power supply.

The control, protection, metering, communication, and SCADA systems are equipped in accordance with the regulations of EVN, EVNNPT, the electrical equipment regulations, and current legal standards.

The 220kV double-circuit line is constructed from the Gia Loc 220kV substation, interconnecting with the Hai Duong-Pho Noi 220kV transmission line. The line has a total length of approximately 5.37 km.

In his conclusion, Hoang Van Tuyen, deputy CEO of EVNNPT, acknowledged and highly appreciated the efforts of NPMB, the EVNNPT Investment and Construction Management Board, and all participating units for overcoming challenges to complete the project.

He emphasized that this is a key project to ensure power supply for the loads in Hai Phong city, meeting the economic and social development needs of Hai Phong and surrounding areas.

The project will also reduce the load on existing 220/110kV transformers in the Hai Phong region and nearby provinces, contribute to meeting the N-1 reliability criterion, and enhance the safety and reliability of the regional power grid.

Accordingly, the EVNNPT leadership requested NPMB and relevant EVNNPT departments to coordinate with dispatching levels to schedule outages and complete energization within October 2025.

Based on the conclusions and proposals from the internal appraisal council and feedback from relevant parties, the investor-level appraisal council has agreed to accept the project to proceed with necessary final procedures to prepare for energization in the near future.