North-South 500kV transmission line passing through Hai Van Pass (Da Nang) Also from the situation of “two evenings, one morning” and the urgent requirements of reality, in February 1992, the late Prime Minister Vo Van Kiet approved the technical and economic justification for the construction of a 500kV power transmission line. North South. On April 5, 1992, the groundbreaking ceremony for the construction of the North – South 500kV transmission line was held simultaneously in many provinces: Hoa Binh, Quang Nam – Da Nang, Dak Lak… The special feature of the construction The construction of the North-South 500kV transmission line was the construction period within two years, an extremely difficult time for the staff of the energy industry at that time. Workers of Power Transmission Company 2 (PTC2) repair the North-South 500kV transmission line Using a helicopter to check the 500kV North-South transmission line With the spirit of determination of the industry, the close direction of the Government, all levels, and the support of the people, May 27, 1994 went down in the history of the energy industry when the North-South 500kV transmission line was officially launched. put into operation, bringing electricity from the North to the Central and the South. Workers repair the 500kV North-South transmission line carrying current After 27 years of operation, the North-South 500kV transmission line has constantly promoted its role and great efficiency in power transmission, making an important contribution to the country’s socio-economic development. This is also the project that brings the highest efficiency on the total investment capital of the industry and opens the period of modernization of the electricity industry. At the same time, laying the starting foundation for the development of the national power transmission grid. On the occasion of the 27th anniversary of the energizing and operation of the 500kV line, circuit 1, the National Power Transmission Corporation (EVNNPT) would like to introduce the book “North-South 500kV transmission line – The turning point of Vietnam’s electricity industry”. ” (link: http://www.npt.com.vn/d6/en-VN/news/Sach-Duong-day-500-kV-Bac-Nam-Buoc-ngoat-cua-nganh-Dien-Viet- Male-5-242-4939). The book is a grateful gift for the people who made history, directly participated in the construction of the North-South 500kV transmission line and generations of officials and employees of the electricity industry in general, the transmission field. Electricity in particular has always accompanied and joined hands to build and develop EVNNPT more and more strongly.

Flight equipment application PTC2 uses drones to manage and operate the transmission grid. Assigned by the National Power Transmission Corporation (EVNNPT) to pilot deploy many scientific and technological applications in the management and operation of the transmission grid, since 2017, PTC2 has researched and applied drones in the field of power transmission. management and operation of the transmission grid. The application helps to reduce the level of burden, improve safety and efficiency, and productivity for workers. Mr. Tran Thanh Phong, Director of PTC2 said that in 2019, after being accepted by EVNNPT, PTC2 has synchronously deployed to all affiliated units to deploy the application of flying equipment in the inspection of the power grid and supporting construction supervision and acceptance of power transmission works. From March 2020 up to now, PTC2 has deployed the application of aircraft to periodically check 1,100 km of 220 kV and 500 kV lines with a total flight time of 29,000 minutes. Thereby, it has contributed to reducing the burden, improving safety, efficiency and productivity for workers such as climbing high, contacting electrical equipment with large electromagnetic fields, moving on difficult terrains. difficult access to dangerous plants and animals. Rapid inspection deployment, being able to access locations in areas divided by rainstorms, landslides, real-time recording of the current situation with good quality images, clear viewing angles to help analyze information more accurate assessment and, most importantly, does not require power line interruption. Mr. Tran Thanh Phong analyzed, when applying flying equipment, according to preliminary calculations, on average, to test 1 km of 500 kV transmission line, it takes 0.52 time to perform the traditional method, and 0. 25 workers, down 0.27 jobs (52.38%). In addition, it also saves a lot of time, costs, and other human resources such as: checking thematically on corridors, conductors, lightning conductors, techniques, insulation status, accessories… Along with that, the application of flying equipment to support construction supervision of power transmission works, inspection, supervision and acceptance of pole erection, inspection of conductors, accessories, route corridors, etc. 220 kV, 500 kV works. Not only that, the application of flying equipment helps closely monitor the technical status of the power grid from above and in places where the human eye cannot see (or is very difficult to see). From there, it contributes to reducing the level of burden, improving safety, efficiency and productivity for workers such as climbing high, contacting electrical equipment with large electromagnetic fields, moving on difficult terrains. , access to dangerous plants and animals. Check for dangerous landslide areas or break off during flooding. Efficiency from surveillance camera system thống Camera system to monitor power transmission lines. An effective application for EVNNPT and PTC2 is the installation of line surveillance camera systems. Realizing the high efficiency and applicability of line cameras, PTC2 has installed cameras at all affiliated Power Transmissions since 2020. Up to now, on the PTC2 grid, 31 CCTV cameras have been installed on the transmission lines of the company. The cameras are connected to the company’s dispatching room so that functional departments as well as company leaders can monitor the current status and direct handling remotely when there are abnormalities on the line. According to Mr. Phong, the camera has a wide field of view, so it helps remote observers to easily detect and accurately assess abnormalities arising on the route such as: fires near the corridor, landslides, vehicles passing photos affect the safe operation of the line. Along with that, the camera helps to quickly access the scene to locations in flooded areas, thereby capturing the situation of the route section and directing appropriate handling. Since installing the camera up to now, PTC2 has detected 35 unusual incidents that may affect the safe operation of the line, thereby taking appropriate measures to ensure operation. In the coming time, PTC2 will continue to research on technology solutions for cameras, solutions for data transmission and analysis, image processing, and propose equipment and installation at necessary and important locations for roads. cord.

Digital Transformation Awareness Course Recognizing this importance, recently, EVNNPT has organized an awareness raising course on digital transformation in the form of direct and online to 50 bridge points in localities. This is one of the important tasks in implementing the digital transformation of EVNNPT in the period to 2025. Speaking at the course, Mr. Nguyen Tuan Tung – Chairman of EVNNPT Member Council emphasized: Digital transformation is an important task, an inevitable foundation for the application of the achievements of Industry 4.0 in the fields of operation of EVNNPT. ; consistent with the undertakings and policies of the Party and Government; This is an urgent task that should be given top priority in the activities of EVNNPT in the current period and in the coming time. At the course, leaders, officers, and employees of EVNNPT heard about general information about digital transformation, digital economy, digital society in the country and the world; clearly distinguish between digitizing and converting numbers; practical experience in digital transformation in domestic enterprises. In fact, on the basis of implementing Resolution 134-NQ / ĐU of EVNNPT Party Committee dated June 17, 2019 on promoting research and technology application of Industry 4.0 in the field of power transmission, training Raising awareness about digital transformation has been implemented by EVNNPT very early. From 2019, EVNNPT has organized training courses on awareness, strategy, digital transformation management for EVNNPT managers and units; orientation, goals and tasks of Vietnam Electricity (EVN) / EVNNPT on digital transformation; Cultural habits promote digital transformation. Implement training via eLearning combining online competitions to disseminate awareness of digital transformation and information security to all officers and employees. According to Mr. Nguyen Tuan Tung, digital transformation at EVNNPT is to carry out the transformation of perception, digital human resources, digital business processes and application of digital technology at the same time. To facilitate digital transformation, EVNNPT has gradually reviewed and adjusted business processes to allow computerization, reducing reports and paper records; to promulgate policies to promote innovation, creation and application of digital technologies in the power transmission field. In 2020, EVNNPT has completed building an information technology (IT) capacity framework in the digital era and in 2021 will conduct training and assessment of basic IT application skills specified in Clause 1, Article 2. Circular 03/2014 / TT-BTTTT of the Ministry of Information and Communication for employees; assessing, developing and implementing skill development plans for staff in positions in IT positions, meeting IT skill standards and enhancing professional capacity in information security for IT staff . On the basis of the courses and digital transformation plan of EVN / EVNNPT, Mr. Nguyen Tuan Tung asked member units to make detailed plans of their units, with the goal of building EVNNPT into digital enterprises. year 2025, in which the basic number conversion will be completed in 2022. EVNNPT strives that by 2021, most EVNNPT officers and employees will firmly grasp the guidelines, orientations and tasks on the roadmap to change EVNNPT arguments; have basic understanding of digital transformation; have the habit of being ready for number conversion; have basic IT application skills.

As a unit of EVNNPT established on May 1, 1981, after 40 years of building and maturing, generations of leaders of PTC1 always care and invest in people, so that employees can own equipment, technology, ensure the power grid operation, safety, efficiency and quality assurance. Apply technology to check heat emission, detect the cause of the problem early Currently, the power grid managed by PTC1 is mostly transformers with large capacity (250MVA with 220 kV), (900 MVA with 500kV), along with oil resistance are the main equipment in the substations ( TBA). The company has widely applied online monitoring equipment to control the pressurized state under OLTC load, cooling system, current, pressure, oil … revealing the breaker of the company applying GIS, COMPACT technology, vertical compensation systems 500kV-2000A, new technology … is implementing the roadmap of gradually bringing 220 kV substations into remote control. The company is also the leading unit in the lead and acceptance of digital substations in Vietnam (220 kV Thuy Nguyen substation) and is assigned by EVNNPT to develop a process for accepting digital substations in the corporation. The development of technology and the rapid growth of the volume and scope of management requires that the qualifications of the staff be enhanced to meet the requirements. Accordingly, the company has identified training objectives for each specific target group with many types of training. At the same time, to alternate dispatching qualified, qualified and young staff members at substations, functional departments and regional power transmissions to the company’s technical department, while training in the form of mentoring, just participating in the work of acceptance of new projects to get an overview, synchronize and improve the level … Owning technology equipment The results of many recent years show that the company always ensures good implementation of the incident targets. The quality of human resources has been raised, creating conditions to arouse a movement to promote technical innovation initiatives in labor. In the past 5 years, the company has had 288 initiatives proposed to be applied in production, bringing an estimated value of several tens of billion VND, more importantly, initiatives and rationalization of production are all derived from practical needs of production. Thuy Nguyen 220kV substation (Hai Phong) is the first digital substation of EVNNPT managed and operated by PTC1. The appreciation of the human factor and creating conditions for each individual to improve their skills has helped the company to master equipment, technology and become more and more professional in management. By internal force, the company has successfully implemented a number of typical projects such as: replacing porcelain and accessories for the whole 220kV Hoa Binh – Ha Dong transmission line; overhaul and overhaul 500 kV transformers at Ha Tinh, Nho Quan and Hoa Binh stations … In addition to major repair works, the company has also successfully implemented many large-scale and complex construction investment projects such as: Raising the capacity of 500 kV capacitor line in Nho Quan- Ha Tinh; increase capacity of 500kV Thuong Tin substation; raising the capacity of the 220 kV transmission line Hoa Binh – Nho Quan … are all group B projects with total investment value of 300 to 450 billion dong. With efforts to care about people, the company has overcome many difficulties and always completes the assigned tasks. With the achievements in the past 40 years, PTC1 has been awarded many noble titles and awards by the Party and the State such as: Third Class Independence Medal in 2000; Labor Hero 2005; Second Class Independence Medal in 2007; First Class Independence Medal 2014.

Thuy Nguyen 220kV substation (TBA) includes 2 transformers (MBA) 220/110 / 22kV – 250MVA, and in this phase, 1 transformer will be installed. The 220kV side uses the diagram of two busbar systems with a ring busbar with 12 compartments. In this stage, equipment is installed for 7 lanes. The 110kV side uses the diagram of two busbar systems with a ring busbar with 21 compartments. In this stage, equipment is installed for 13 lanes. The station has an area of ​​about 40,100 m2 located in Dong Son commune and Kenh Giang commune, Thuy Nguyen district, Hai Phong city. This is a class I energy project of group B, with a total investment of more than 348 billion dong, invested by EVNNPT, the project is managed by NPMB, and operated by Power Transmission Company 1. Mr. Pham Le Phu, General Director of EVNNPT, said: Digital substations are not only new technology for Vietnam but also advanced countries. Before implementing the project, EVNNPT held many seminars with major equipment manufacturers in the world such as Siemens, ABB, and GE, but the number of 220kV substations was the same size as Thuy Nguyen 220kV substations using TBA technology. number is very few. Thuy Nguyen 220kV substation has the advantages of reducing copper cable by about 80%; reduce transportation, construction and installation of copper cables and reduce the area of ​​cable trenches; reduce the installation space of control and protection devices. Thuy Nguyen 220kV substation will ensure power supply for additional loads and meet socio-economic development needs of Thuy Nguyen district, Hai Phong city and surrounding areas, reduce power loss and strengthen connectivity. safe, stable and flexible in operating the power system.

The 110 kV side uses the diagram of two busbar systems with a ring busbar with 21 compartments, in this stage, installing equipment for 13 lanes. Thuy Nguyen 220 kV substation has an area of ​​about 40,100 m2 located in the area of ​​2 communes Dong Son and Kenh Giang, Thuy Nguyen district, city. Hai Phong. This is a class I energy project of group B, with a total investment of more than 348 billion dong, invested by EVNNPT, the project is managed by NPMB, and operated by Power Transmission Company 1. Thuy Nguyen 220 kV substation is the first substation in Vietnam. Photo: VGP According to Mr. Luu Viet Tien, Deputy General Director of EVNNPT, Thuy Nguyen 220 kV substation has the advantages of reducing about 80% of the copper cable; reduce transportation, construction and installation of copper cables and reduce the area of ​​cable ditch; reduce the installation space of control and protection devices. Mr. Tien also added that digital TBA is not only a new technology to Vietnam but also to advanced countries. Before implementing the project, EVNNPT held many seminars with major equipment manufacturers in the world such as Siemens, ABB, GE … however the number of 220 kV substations was similar in scale to the 220 kV Thuy Nguyen substations used for Current digital TBA technology is very few. The power supply and operation of the 220 kV Thuy Nguyen substation will ensure the power supply for the load and meet the socio-economic development needs of Thuy Nguyen district, city. Hai Phong and its surrounding areas, reduce power loss and strengthen connectivity, safety, stability and flexibility in power system operation. At the same time, in the process of investing and operating the 220 kV Thuy Nguyen substation, EVNNPT will summarize and evaluate the advantages, disadvantages, benefits, costs and investment efficiency of digital substations to serve as a basis for decision. select control technology, protect TBA in the future.