Unit H5 of Hoa Binh Hydropower Plant (HP) has been put into operation since 1992. Through inspection, it was discovered that the impeller has been eroded and had cracks in its wings, leading to a high risk of accidents. Meanwhile, the forecast of power demand in this year's hot season in the Northern region is also very high, requiring the units to safely, stably operate, and maximally generate capacity. Therefore, EVN assigned EVN Repair Service Center (EVNPSC) to coordinate with Hoa Binh Hydropower Company to replace this impeller from 10 January 2023. The Vietnam Electricity Trade Union organized an associated emulation campaign to strive to complete this task before 30 May 2023.
This is a major repair work of great significance. For the first time, EVN has replaced and installed the impeller by itself, demonstrating its autonomy in repair and maintenance work for the renovation of large hydroelectric power units.
EVN’s Vice President Ngo Son Hai (leftmost) visits and encourages staff replacing impellers
EVN’s Vice President Ngo Son Hai asked the Director of EVNPSC, the Director of Hoa Binh Hydropower Company to continue directly directing related works, ensuring milestones, the most recent one, on 24 March, to install and lower the new impeller. EVN Technical and Production Department continues to monitor and promptly solve arising problems, striving with the unit to complete replacing the impeller of unit H5 5 days ahead of schedule (compared to the timeline as of 30 May 2023).
EVN's delegation inspecting the impeller chamber of unit H5
EVN's leaders also requested EVNPSC and Hoa Binh Hydropower Company to continue to focus on monitoring and ensuring industrial safety and hygiene; be flexible in maneuvering and optimizing human resources; work out a good plan for the upcoming experiment.
Vice President Ngo Son Hai also praised EVNPSC's initiatives in the process of replacing the impeller of unit H5.
EVN’s Vice President Ngo Son Hai delivering a steering speech at the meeting with EVNPSC and Hoa Binh Hydropower Company, on 15 March 2023
Currently, EVNPSC has been cooperating with Hoa Binh Hydropower Company to inspect and accept the goods to be installed at the site. EVNPSC coordinated with the contractor to mobilize 9 foreign experts in each implementation phase. The workforce of EVNPSC involved in the implementation includes 56 people. EVNPSC arranged 2 working teams to consecutively work in 2 shifts to ensure the progress, shorten the repair time, speed up the project progress so that the unit is ready to be mobilized high before the rainy season in 2023.