In 2016, the Cao Thang 110kV Transmission Line and Substation Project (Ha Long City) was approved by the Ministry of Industry and Trade, with a total cost of over VND 260 billion from a loan from KFW (German Reconstruction Bank). However, up to now, all the "planned" milestones set for the project have not been implemented due to problems in site clearance, forcing the route to be adjusted many times. According to calculations, if the project is not implemented by the end of 2025, the Electricity industry will have to repay the ODA loan and Ha Long City will be the locality indirectly affected in socio-economic development.
Currently, the entire Hon Gai area of Ha Long City is supplied with electricity from the 173, 174 T500 Quang Ninh power lines. Both lines were built in 1985. However, with small conductor cross-sections while the load in the Hon Gai area has increased sharply over the years, the lines often operate at high loads (up to 80%). In addition, due to the characteristics of running in coal mines and coastal areas, both lines are also eroded by saline and dusty environments, affecting the physical properties of the lines.
With the aim of supporting the loop circuit, sharing the load for the 173, 174 T500 Quang Ninh lines, ensuring stable power supply for Ha Long City even in case of problems with the 173, 174 T500 Quang Ninh lines, since 2015, the Northern Power Corporation decided to quickly put the Cao Thang 110kV Power Line and Substation project into implementation and identified it as one of the key projects of the Electricity industry. In 2016, the project was officially approved by the Ministry of Industry and Trade and the Project Management Board of the Corporation was assigned as the investor.
According to the design, the Project will construct a new 10km 110kV 2-circuit overhead power line from the 550kV Hoanh Bo Transformer Station (Thong Nhat Commune), passing through Ha Khanh Ward to Cao Thang Ward. The project also has an additional 110kV underground cable line about 2km long, and a new 110/22kV transformer station with a scale of 2 x 63MVA. Due to the large volume of lines, according to the original design, the project had to pass through coal mines and mangrove forests, so the project spent a lot of time adjusting the route.
In 2022, after completing the adjustment of the route, organizing the bidding and identifying the contractor, the project continued to be entangled in the planning of the province and Ha Long City. Specifically, for the 110kV overhead line, the People's Committee of Ha Long City requested to adjust the planning of the route from position 1-12 (3km) because it was not consistent with the city's general planning approved by the Prime Minister in February 2023; Hon Gai Coal Company proposed to consider adjusting the positions from column 19 to column 30 because it was located in the subsidence area and affected the unit's exploitable reserves; the 110kV line must survey and redesign the overlapping planning columns and resubmit the detailed planning 1/500.
Regarding the 110kV substation, according to the planning of the project to expand Bui Thi Xuan street, Hong Hai ward of Ha Long city, in 2021, the coordinates of Cao Thang 110kV substation were updated in the master plan. However, after checking and comparing with the general planning of Ha Long city, the coordinates of the station location were not consistent.
The above-mentioned problems have prevented this project from being implemented for a long time, making it the project with the “record” delay in the Electricity industry. It is worth mentioning that the delay in project implementation has significantly affected the electricity supply for people and businesses in Ha Long City.
Typically, in March-April 2024, Quang Ninh Electricity Company, in the process of renovating the 173, 174 T500 Quang Ninh-Giap Khau-Ha-Tu-Ha Lam lines, was forced to reduce peak-hour capacity for nearly 65,000 customers. That is, if the Cao Thang 110kV line project is implemented, all activities and production of nearly 65,000 customers in Ha Long will not be disrupted.
Determined to overcome difficulties, in early January 2025, the Northern Power Corporation decided to assign Quang Ninh Power Company to preside over and coordinate with units to implement the agreement on the adjusted route to suit the planning. At the same time, work with local authorities to get approval from competent authorities to adjust the project route, carry out procedures to approve the detailed planning at a scale of 1/500, and compensate for site clearance.
Currently, Quang Ninh Electricity Company has re-surveyed the 110kV line and developed a plan to remove it. Accordingly, some lines in the project will be on the same pole as the existing 173, 174 T500 Quang Ninh lines, so as not to create additional lines passing through coal mines. At the same time, the route will be adjusted and the lines will be buried underground in areas passing through many houses to minimize the impact of the project on the people.
Mr. Dang Thanh, Deputy Director of Quang Ninh Power Company said: The Company's plan is to ensure that the project is implemented in 2025 and put into operation according to the direction of the Corporation. For the project to be completed soon, we really need the coordination of Ha Long City, the Department of Construction and related units to soon approve the adjusted route plan. On that basis, approve the 1/500 planning and speed up the compensation and site clearance work.
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