At the Hai Phong remote control center, the basic features of the SCADA/DMS central software system have been fully exploited such as: managing the grid information model including managing all the main data of the network. control center, edit or create new single-strand diagram structure of TBA, color grid, edit graphics, batch data import, declare and map signals of equipment at TBA and devices on the distribution grid (Recloser/LBS/FI), set up audio and event alarms, simulate the status of equipment on the grid, store, analyze and exploit historical data on the system. In addition, Hai Phong remote control center is gradually deploying and building a smart grid subsystem (DMS) with grid computing applications such as: load reporting, distribution estimation, capacity flow calculation, fault locating and isolation, etc. Operations Engineer at Remote Control Center The conversion of manned 110kV substations into 110kV unmanned substations helps to promote the application of digital technology, innovate and improve the management and operation process of the power system. As of May 27, 2021, the Company has 07/24 110kV substations operating with unmanned criteria, 09/24 110kV substations operating in remote operation mode with on-site supervision. 70/90 devices (Recloser/LBS) on medium voltage grid are connected and controlled remotely from Hai Phong Remote Control Center. With 99% success rate of remote manipulation ( As planned in 2021 put 110kV and . substations control devices Recloser/LBS rest perform remote control) contributed to improving labor productivity, reducing system operating costs, improving reliability of power supply and ensuring safe grid operation. In early 2021, Hai Phong PC applied digital technology to develop software for automatic ground fault handling. The software is currently being put into trial operation. Automatic ground fault handling software is highly applicable, helping to automate the current ground fault handling process, reducing the time to find fault points, and minimizing the number of customers. affected by incidents, thereby reducing power supply reliability indicators SAIDI, SAIFI, MAIFI, improving power quality, avoiding confusion that may occur due to subjective factors of users caused by operation. Automating the troubleshooting process enhances worker productivity by reducing the dependence of the troubleshooting process on the operator. The software is a premise for the development and expansion of advanced applications in the process of modernizing the distribution grid towards operating the smart grid in Hai Phong city. With efforts and determination to realize the goal of digital transformation, Hai Phong PC in particular and the Power industry in general are gradually implementing innovation, creativity, digital technology integration and production management model. business, technical management, making an important contribution to the digital transformation roadmap of the Electricity industry in order to improve the quality of customer service, to meet the needs of socio-economic development of Hai Phong city.

The remote operation success rate is over 99%. When an incident occurred, 81% of affected customers were immediately transferred and restored to power in less than 5 minutes (compared to 120 minutes of TCT’s regulation). The process of investment in development and modernization of the power system in Thu Duc City over the past years has shown that the reliability of power supply has improved significantly. Average number of outages per customer (SAIFI) is 1 time/year; the average outage time of a customer (SAIDI) is about 60 minutes/year – much lower than the 2015 index of 6 times/year and 700 minutes/year, respectively. With the motto “Electricity is one step ahead”, Ho Chi Minh City Electricity Corporation has a plan to prioritize investment in the development of the power system for Thu Duc City, focusing on developing smart grids in parallel with deploying other utilities. underground works. The goal is that by 2025, the electricity output supplied to the people of Thu Duc City will reach 5,500-6,500 kWh/person/year, the average number of power outages is less than 0.3 times/person/year and the average duration of power failure. less than 30 minutes/person/year. Mr. Pham Quoc Bao, Chairman of the Members’ Council of Ho Chi Minh City Electricity Corporation. In the period of 2021-2025, Ho Chi Minh City Electricity Corporation will invest about VND 3,200 billion to build a new 220 kV station and 6 110 kV stations (total added capacity is 1,382 MVA), develop 245 new stations km of medium voltage grid; 585 km of low voltage power grid, renovating and installing 447 distribution substations with a total capacity of 363 MVA in Thu Duc city. In this year, the corporation will complete Phuoc Long 110 kV station, start construction of new 110 kV Linh Dong station, 220/110 kV Thu Thiem station and 110 kV Thu Thiem station 1. In addition, the Ho Chi Minh City Electricity Corporation deployed 27 projects to undergroundize the power grid combined with information lines in Thu Duc city, in order to increase the undergroundization rate of the medium voltage grid from less than 50% at present to 75. -80% by 2025. With the motto “Customer is the center”, the electricity industry promotes digital transformation to improve the quality of electricity supply and customer service for the whole Ho Chi Minh City, including Thu Duc City. The focus is on promoting digital transformation in power system operation management and customer service provision in Ho Chi Minh City. The Corporation promotes the development of smart grids in Thu Duc city with the investment of a remote metering system, increasing automatic components on the power grid. Currently, the Corporation has basically completed the installation of distance meters in Thu Duc city. By the end of this year, 100% of medium voltage lines in Thu Duc city will operate fully automatically (DAS/DMS). In the period of 2021-2025, the corporation will continue to invest in strengthening remote control devices for medium voltage lines, along with solutions to close loops, and enhance the form of construction without power cut (live- line), in order to improve the flexibility of transmission, reduce the range and number of customers affected by power outages (if any). View of Thu Duc city. On the other hand, the corporation promotes the development of EVNHCMC Customer Care application (app) on the phone. The area of ​​Thu Duc district (old) has completed the installation of distance meters since 2020. Customers can monitor their daily electricity consumption through this application. All electrical services are provided online by the corporation. Customers do not have to go to the electricity headquarters to register, instead register for the service on the customer care website or via the app) EVNHCMC Customer Service of the corporation. In addition, TCT also promotes the application of 4.0 technology in surveying, designing and improving procedures to continue to improve the electricity access index, ensuring all investment projects through the medium voltage grid. 22 kV power supply for customers is carried out by the electricity industry within 5 days, contributing to attracting investment businesses in the city. “EVNHCMC prioritizes focusing resources, rapidly developing modern power systems in Thu Duc city, in order to ensure the power supply capacity to meet the city’s development needs, constantly improving the quality of electricity. electricity and customer service, contributing to building Thu Duc City into a new growth pole of Ho Chi Minh City, worthy of its potential and meeting the expectations of leaders and people”, Mr. Pham Quoc Bao positive.

In order to prepare for the heat wave in 2021, Nghe An Power Company (Nghe An PC) has directed its units to quickly deploy the proposed solutions and scenarios to ensure electricity supply for the whole country. Nghe An province. Nghe An PC workers check outdoor equipment at Hung Hoa Substation (Nghe An) PC Nghe An information, during this year’s hot season in Nghe An, there will be many prolonged heat waves, leading to an increase in the demand for electricity for cooling than in previous years. It is expected that power output will increase, with an estimated capacity of about 820 MW. In order to ensure stable power supply in the face of increasing electricity demand in the summer of 2021, Nghe An PC has prepared a “scenario” carefully, with many solutions to supply electricity to people and businesses. Mr. Le Quang Thanh – Deputy Director of PC Nghe An said that 2021 is not expected to be as hot as the previous year, but despite the prolonged epidemic, most businesses in the area are operating stably again. power consumption is expected to increase. Regarding the load forecast, this year’s output growth will be higher than last year’s at over 12%. The most important and basic solution identified by the unit is to increase the power supply capacity, with the rapid completion of construction of substations and power lines for areas in the province. Accordingly, from the end of 2020 until now, Nghe An PC has built and installed hundreds of large and small projects, including: Raising the capacity of 110kV substation in Cua Lo route, increasing the capacity of 110kV Quynh Luu substation, completing upgrading the transmission line. 110kV from Quynh Luu – Quy Hop. Along with that, renovating and upgrading low-voltage trunk roads; replace the meter periodically; strengthening overhaul, cleaning of transmission lines and transformers; replacing the name plate number of the road, pole number, safety sign of the substation transmission line… and is implementing the plan to energize and put into operation 110kV Con Cuong substation, increasing the capacity of 110kV Hung Nguyen and Quy Hop substations in the month. 6/2021. After energizing, the station will power on in time to serve the people’s demand for electricity in the summer months; support stable and safe power supply in the area. However, according to PC Nghe An, the case of an unexpected increase in output through monitoring is unlikely and in fact, if it happens, the power infrastructure including medium voltage transmission lines, substations and power grids. low voltage will still be able to meet. Alternating power cuts to reduce capacity as announced by EVN will not happen, however, it does not exclude some cases such as: The power supply of the whole system is malfunctioning, incidents such as the breakdown of hydroelectric power units , the North – South 500kV transmission fault leading to failure to mobilize the grid capacity of the whole system will be automatically laid off. In addition, there is a problem of maintenance schedules of power plants (thermal power plants, hydroelectric plants) which can also lead to lack of power, requiring capacity regulation between regions. In the coming period, the vicinity of Nghe An will record a sudden increase in load, especially in Thanh Hoa area, and in Nghe An will also have a sudden increase at the end of 2021 when Hoang Mai 1 and Hoang Mai IPs WHA Industrial Park comes into operation. This is not only a problem for the electricity industry in Nghe An but also for the power system in the North as well as in the whole country. To solve it, EVN will have capacity coordination solutions to meet demand. Power supply scenarios have been developed at the transmission grid level (220kV, 500kV) in order to mobilize and balance capacity in the North – Central – South region. Thus, in the short term, the stable and continuous power supply for Nghe An will be ensured. PC Attention Nghe An Use electricity in hot weather PC Nghe An also noted that, in order for the power grid to operate stably during the peak of heat, it is necessary to coordinate and propagate propaganda at all levels of the government, local and central media agencies on the appropriate use of content. , saving. This content is very important for the national power system and grid, will avoid unnecessary grid overload due to unreasonable use, reduce the greenhouse effect, help limit environmental pollution, have a enough electricity to serve economic development for production and also save living costs for electricity users themselves. PC Nghe An continuously advises customers to avoid being subjective, negligent, not to misunderstand between electricity price and electricity consumption; Use electricity in the most efficient and economical way when entering the hot season. Just small actions from the people such as turning off electrical appliances when not in use, not using many large-capacity devices at the same time, using low-power consumption equipment labeled energy-saving by the Ministry of Industry and Trade. Industry and Trade inspection will help save electricity. PC Nghe An has prepared scenarios for electricity growth in hot weather Families should use air conditioners at a reasonable level of 26-27 degrees Celsius or higher and use fans in combination to reduce power consumption. When using a cold room, do not open the door often, do not use electrical appliances with heat-generating features in the room such as irons, ovens, electric kettles, and hot water heaters. Families have many rooms, when watching TV should focus on watching together, turn off all devices in neighboring rooms. Use electricity only when absolutely necessary, avoid using devices simultaneously during peak hours… For factories, make sure to use the correct capacity and load chart. Along with that, implementing a reasonable production plan, minimizing the mobilization of equipment and machinery with large electricity consumption capacity at peak hours. To minimize electrical equipment operating at no-load, key energy-using establishments must save at least 2% of electricity consumed per product unit per year. Advise customers to use electricity as committed to the electricity industry in terms of registered load and time frame, or reduce capacity when required by the electricity industry due to sudden increase in load… When purchasing new equipment, pay attention to use equipment with energy-saving certification label of the Ministry of Industry and Trade. Responding to the electricity sector, coordinating propaganda and recommending surrounding households to save together.

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.

“The installation of these transformer stations is based on the Hanoi Electricity Development Plan and the actual needs of the people and businesses in the area. Because, after the project paving the way is completed, the number of high-rise buildings on the road surface will increase sharply, leading to an increase in electricity demand, without upgrading the substations, it will not be able to meet the electricity demand during the season. Next summer ”- Mr. Le Dung analyzed.

The location of the transformer station on the sidewalk of Minh Khai street, 3.9 meters from the edge of the house

According to the Deputy Director of Hai Ba Trung Power Company, on the route, there are 7 transformer stations located on the line, up to now, there have been 4 stations with completed construction of underground parts; install the equipment in accordance with the approved positions, in which there is transformer station No. 19.

In the process of choosing the location of these stations, Hai Ba Trung Power has worked and agreed with the ward authorities; District; functional departments of the People’s Committee of Hai Ba Trung district and the unit managing the ring road 2 investment project.

“Ring road 2 is under urgent construction. The technical infrastructure related to the route must also be constructed synchronously to avoid the project being excavated again after completion. Therefore, the power sector has actively implemented the installation of transformer stations, both to ensure the power supply requirements in the coming period as well as synchronize with the Ring Road 2 project “- Mr. Dung said.

However, on April 12, 2021, at the location of the above-mentioned 19 transformer station, Hai Ba Trung Electricity checked and discovered that the transformer station’s cover was covered with a blue nylon canvas.

More seriously, at 9pm on April 14, 2021, when the above-mentioned canvas was removed to continue the construction and installation of equipment and accessories for the station, the construction unit of Hai Ba Trung Electricity had a number of unknown objects obstruct and prevent construction. In order to avoid possible complications, Hai Ba Trung Electricity had to suspend construction.

It is necessary to urgently support the complete construction of the transformer station on Minh Khai street, promptly operate it for the people of the summer of 2021.

According to the plan approved by the Hanoi Electricity Corporation, we will have to complete the construction, energize and put the substation into operation before April 23, 2021 to promptly serve the people in the Summer peak 2021. Therefore, to meet this requirement, we have sent a written request to the People’s Committees of Minh Khai and CAP Minh Khai wards to coordinate and support Hai Ba Trung Electricity in ensuring security and order. , safe for the construction force of the unit “- Mr. Le Dung said.

Regarding the above incident, Mr. Trinh Le Duc, Chairman of the People’s Committee of Minh Khai ward (Hai Ba Trung district) said that the ward has grasped it. However, according to the Chairman of the People’s Committee of Minh Khai ward, up to now, the ward has not received any letter or feedback from the people about the location of the transformer station mentioned above.

“Initial review shows that the installation of transformer stations of the power sector is in accordance with the planning and actual needs of the locality as well as the current regulations. In the process of choosing the location of the station, the power sector has discussed, worked with and agreed with the concerned units and the ward People’s Committee.

Regarding the objects obstructing the construction, we received information from the electricity sector and assigned a comrade Vice Chairman of the ward People’s Committee, urban officials and the ward police force to coordinate and support the application. The developer will complete the energizing construction stage in the coming time, ensuring security and order in the area “- Mr. Trinh Le Duc said.

The project has a total budget of about 68 billion VND from commercial loans and reciprocal capital of EVNCPC. Artwork: Mai Phuong / BNEWS / TTXVN

To meet the need to release capacity for renewable energy sources and create socio-economic development momentum in the northern region of Kon Tum province, Central Power Corporation (EVNCPC) has just implemented the project. Improve transmission capacity of Dak Ha 110kV transmission line – Kon Tum 220kV transformer station.

The project has a total budget of about 68 billion VND from commercial loans and reciprocal capital of EVNCPC.

Accordingly, the 110 kV Dak Ha transmission line – the 20 kV Kon Tum transformer station is the lifeblood, supplying and transmitting electricity to the northern districts of Kon Tum province such as Dak Ha, Dak To, Ngoc Hoi, Dak Glei.

However, with the potential to develop renewable energy sources such as hydroelectricity, wind power, and solar power, Kon Tum has attracted many businesses to invest in renewable energy projects.

This leads to the line’s capacity to carry the load not enough to release capacity, regularly implementing the reduction, causing damage to investors and affecting the local economy.

The project to improve transmission capacity of Dak Ha 110 kV transmission line – 220 kV Kon Tum substation was commenced by Kon Tum Power Company in March 2020, with the scale of new construction of dual-circuit lines from transformer station The 220 kV Kon Tum voltage to the Dak Ha 110 kV transformer station, more than 14 km in length, was newly built, replacing the entire old line with insufficient capacity with galvanized steel poles, using ACSR-300/39 conductors and the modern dual-circuit 110 kV line connection.

Currently, the project has been completed and energized by Kon Tum Power Company and put into use in March 2021. The completion and putting into operation of the project is very important in promoting the socio-economic development of the locality, contributing to ensuring energy security, improving electricity supply reliability and reducing losses. power failure in the northern districts of Kon Tum province.

Mr. Hoang Danh Chuyen’s family (village 1, Ha Mon commune, Dak Ha district) currently uses 1 transformer station to cultivate more than 17 hectares of coffee, fruit trees and fish ponds.

“When the line has not been upgraded yet, the current often flickers, sometimes power outages, so it is difficult for the family to focus on production. Now, the upgraded power line has helped to stabilize the power source, so irrigation with electric pumps is more convenient and economical. ”, Mr. Hoang Danh Chuyen shared.

In June 2020, Ngoc Wang Electricity Investment Joint Stock Company invested in building a roof-top solar power project on an area of ​​more than 8,000 m2, in Dak Ha district, with a total investment of 15 billion VND / MW. .

However, the capacity of the 110 kV Dak Ha transmission line is limited, so the company’s revenue is only 180 million dong / month.

Mr. Nguyen Manh Hung, Chairman of the Board of Directors of Ngoc Wang Electricity Investment Joint Stock Company shared, when the 110 kV Dak Ha line was invested and upgraded, the electricity system was transferred smoothly, no an overload occurs; from there, helping the company’s revenue to reach more than 300 million / month.

Through the project to improve the capacity of the 110 kV transmission line Dak Ha – the 220 kV Kon Tum transformer station, nearly 20 small and medium hydropower plants and more than 80 rooftop solar power projects using power lines have been guaranteed. Electricity supply protection and capacity transmission to the national power system.

Deputy Director of Kon Tum Electricity Company Nguyen Thanh Phuong said that the project has helped increase safety in operation and release capacity for hydropower and solar power plants in the region with a capacity of about 240. MW; at the same time, to be able to release the capacity of regional electricity development planning in the coming time, while ensuring electricity supply to meet the needs of socio-economic development, security and national defense in the region. Central – Central Highlands in general and Kon Tum province in particular./.