📋 Tender Overview
The National Power Transmission Corporation (EVNNPT), Power Transmission Company 1 (PTC1) in coordination with the Northern Power System Dispatch Center and related units have just successfully energized the AT7 transformer under the project to increase the capacity of the 220kV Ha Dong Transformer Station. Download AT7 transformer at Ha Dong 220 kV substation has just been successfully energized - Photo: VGP/Toan ThangThe project is invested by EVNNPT, PTC1 is assigned to manage, operate and deploy within the existing Ha Dong 220 kV Substation (TBA) (Duong Noi ward, Hanoi city). Project scale includes installation of 220 kV AT7 transformer with a capacity of 250MVA and Related synchronous equipment meets technical standards of EVN and EVNNPT. After completing the capacity increase, Ha Dong 220 kV substation has a total capacity of 1,189 MVA (4x250 MVA + 3x63 MVA). Putting into operation the AT7 transformer of Ha Dong 220 kV substation contributes to enhancing the ability to supply electricity to Hanoi capital right from this years hot season; Reduce load on existing transformers operating in full load and overload conditions. At the same time, the project also creates favorable conditions for the work of transferring, replacing and maintaining equipment that has been in operation for a long time at other key stations. RELATED NEWS Energizing the project to enhance electricity security for the North on the occasion of the April 30th anniversary Successfully energizing the Go Cong 220 kV Transformer Station project and connection lines Successfully energizing horizontal compensation resistance at Pleiku 500 kV substation According to Power Transmission Company 1, the machines Transformer at Ha Dong 220kV substation often operates under full load and overload conditions. Meanwhile, many devices that have been in operation for nearly 30 years are at the end of their life cycle and have a potential risk of incidents affecting electricity supply. Following the direction of EVN and EVNNPT, PTC1 has implemented the project under many difficult and challenging conditions. The construction process takes place while the equipment in the station is still energized; Arranging the power cut schedule also encountered many difficulties due to the need to mobilize high capacity to ensure electricity supply to Hanoi Capital. However, with the close direction of EVNNPT, along with the efforts of PTC1, affiliated units, construction contractors and close coordination of the National Power System Dispatch Center, the project was energized, meeting the set schedule. Successfully energizing the AT7 transformer not only contributed to improving the operating capacity of the substation. 220 kV Ha Dong but also continues to affirm the efforts of EVNNPT, PTC1 and other units in strengthening all solutions to ensure safe and stable operation of the power transmission system. This is also an important solution to meet the increasing load demand of Hanoi Capital, especially during the peak heat period in 2026. Also in the context of hot weather and increased load, to ensure the safety of the national power system, on May 24, the National Power System and Electricity Market Operating Company (NSMO) mobilized an additional 500 kV AT1 transformer with a capacity of 600 MVA (backup transformer). Pho Noi 500kV Substation was put into operation, thereby increasing the stations capacity to 2,900 MVA. To ensure safe and stable electricity supply during the hot season, the Electricity Industry recommends that customers use electricity safely, economically and effectively, especially during peak heat waves. This action helps reduce the load on the power grid system and optimize household electricity costs. Toan Thang
