Using remote-controlled unmanned aerial vehicles (UAV) with image recording equipment and specialized cameras in power grid management and operation at Lam Dong Power Transmission. Photo: Ngoc Ha/Icon.com.vn. From mid-morning to late-afternoon, the heat reached more than 40 degrees Celsius, blowing hot air in every corner from the countryside to the city, the demand for electricity increased continuously for many days and the transmission grid always at the full load warning threshold. In order to ensure the safe operation of equipment on the transmission grid, the National Power Transmission Corporation (EVNNPT) requires units to strengthen the inspection and monitoring of transformers, resistance, current transformers, etc. voltage transformers, pole clamps, connections on lines, substations. In particular, special attention should be paid to the full-load 500kV transformers such as Viet Tri, Hoa Binh, Nho Quan, Thuong Tin, PleiKu 2, Dak Nong, Vinh Tan and the North – Central 500kV lines. Troubled hot season Deputy Director of Power Transmission Company 3 (PTC3) Ho Cong said that by May 2021, the total installed capacity of solar power will be connected to the PTC3 transmission grid and the distribution grid of Power companies in the region. the area of ​​the provinces: Khanh Hoa, Phu Yen, Binh Dinh, Gia Lai, Dak Lak and Dak Nong has reached 4,093MW, accounting for 36% of the total installed capacity of power sources connected to the transmission and distribution grids in the region. this. In which, the connection at the voltage level of 500kV is 600 MW, at the voltage level of 220kV is 753 MW, at the voltage level of 110kV is 940 MW, and the farm and rooftop solar power connected at the voltage level below 22kV is 1,801 MW. With the very fast development speed of solar power plants, farm solar power, rooftop solar power in a short time, some 220kV transmission lines have been built in Phu Yen, Binh Dinh, Gia Lai and Dak Lak areas. and Dak Nong always operate at full load, overload occurs in the rainy season of the Central Highlands. Especially the 220kV transmission lines: Sinh Mass An Khe – Pleiku (100%); An Khe Biomass – An Khe Hydropower Plant (100%); Quy Nhon – An Khe Power Plant (99%); Quy Nhon – Tuy Hoa (96%); Tianjin – Nha Trang (98%); Nha Trang – Krong Buk (87%); Krong Buk – Pleiku 2: (88%) Dak Nong – Buon Tuahar (102%); Dak Nong – Buon Kuop (99%) and AT1 transformer (97.%), AT2 (96%) 500kV Dak Nong substation; transformer AT1 (94%), AT2 (95%) 500kV Pleiku 2 station; transformer AT1 (100%), AT5 (94%) 500kV Pleiku station… When the power grid is operating in a state of full load or overload, PTC3 must request units to increase the frequency of inspection and monitoring of equipment, transformers, lines and corridors to promptly overcome and handle handle unusual phenomena. In addition, some repair and maintenance works that need to be cut off or periodically tested must be arranged at night when solar power stops generating. The implementation of safety measures, as well as the process of construction supervision, supervision of load-bearing equipment, safety control at poles that cross with medium and low voltage lines and roads at it is dark, at night it will be very difficult, potentially dangerous. Khanh Hoa Power Transmission installed an AI camera to warn of fire in the corridor of the 220kV line: Nha Trang – KrongBuk. Photo: Ngoc Ha/Icon.com.vn According to the document No. 795/TTg-CN dated June 25, 2020 of the Prime Minister on adding the list of wind power projects to the electricity development planning, wind power plant projects in the Central Highlands region. with a total capacity of 2,358MW (accounting for 21% of the total installed capacity of power sources connected to the transmission and distribution grids in this area) is in the process of construction, installation, and putting these projects into operation. November 2021 will put more pressure on the existing transmission grid, which is already full and overloaded in the provinces: Khanh Hoa, Phu Yen, Binh Dinh, Gia Lai, Dak Lak and Dak Nong. In particular, in Gia Lai area, there is a total capacity of 1,242.4MW (voltage level 500kV: 200MW, 220kV: 650MW, 110kV: 392.4MW); Dak Lak area has a total capacity of 685.8MW (voltage level 500kV: 400MW, 220kV: 200MW, 110kV: 85.8MW); Dak Nong area has a total capacity of 430 MW (voltage level 220kV: 380MW, 110kV: 50MW), when put into operation, it will continue to overload 220kV lines of Yang Trung – Pleiku 2 wind power plant; An Khe – Pleiku Biomass, An Khe Biomass – An Khe Hydropower Plant; An Khe – Quy Nhon Hydropower Plant; Krong Buk – Pleiku 2, Dak Nong – Buon Tua shar, Dak Nong – Buon Kuop and AT1 and AT2 transformers at 500kV Dak Nong substation; AT1, AT2 500kV Pleiku substation 2. As a line soldier, the sun also goes to the line, the rain also goes to the line, as a station soldier, flood, or hot weather must be on duty 24/24. In order to mobilize sources effectively, in the current conditions, EVN requires the Power Transmission Companies to transmit the maximum mobilized capacity of the power plant cluster at 100% until the congestion or overload is reached. The associated load is removed. With this requirement, the new operating status of the PTC3 grid is often at 100% full load. Thus, it is necessary to keep the current flowing smoothly in all situations, especially on hot sunny days. With a “hot” area like PTC3, all units, regardless of whether they were on duty or off duty, must gather their manpower to check the grid’s congestion points, the points with high risk of heat generation. The point of line cross-section is small compared to the whole line, the rated current of the equipment in the exposed compartment is smaller than the line, the points have a large deflection, the risk of breaking the distance when the load is high..etc and so on and so forth. problems can occur when the temperature reaches more than 40 degrees Celsius and lasts for many days. It can be said that the transmission shifts during the heat wave are no different from the ones on duty during the flood season. After detecting the risk, it is necessary to propose to reduce the rated current of the line; if the ambient temperature rises suddenly, it is necessary to monitor that the conductor temperature does not exceed the allowable level; make a plan for temporary handling and a plan for long-term handling of bottlenecks of the power grid, determine the time for remediation, and submit it to the Company. For example, during the recent heat wave in May, the transmission units must make statistics of the number of enhanced inspections from the beginning of 2020, thereby proposing a reasonable plan to arrange human resources for the new operation situation; propose the addition of production equipment and tools to serve the operation management in the new operating situation, make a list of proposed equipment to be added immediately. A place to test people’s hearts Using remote-controlled unmanned aerial vehicles (UAV) with image recording equipment and specialized cameras in power grid management and operation at Lam Dong Power Transmission. Photo: Ngoc Ha/Icon.com.vn. Head of PTC3 Dispatch Department Nguyen Manh Tuong said that in the first 5 months of 2021, the electricity output received by the PTC3 transmission grid under management and operation reached 23,918,261,392 kWh, an increase of 16.30% over the same period in 2020; delivered electricity output reached 23,445,807,704 kWh, up 16.10% over the same period in 2020; power output received on the 500kV grid reached 17,223,481,412 kWh, an increase of 26.40% over the same period in 2020; electricity output delivered on the 500kV grid reached 17,000,463,190 kWh, up 26.26% over the same period in 2020; power output received on the 220kV grid reached 13,549,084,784 kWh, up 29.86% over the same period in 2020; electricity output delivered on the 220kV grid reached 13,299,649,317 kWh, up 30.08% over the same period in 2020. Despite this output, the transmission output of Power Transmission Company 3 (Khanh Hoa, Phu Yen, Binh Dinh, Gia Lai, Dak Lak, Dak Nong, Ninh Thuan, Lam Dong, Binh Thuan power transmission lines) assigned to Power companies under the Central Power Corporation (EVNCPC), the South (EVNSPC) and power plants (ND, DT, Solar, EIA) in the first 5 months of 2021, reaching 2,826,264,307 kWh, down 37.85% over the same period in 2020, accounting for 49.18% of commercial electricity output of 9 Power companies. The highest transmission power output in May is May 16, 2021 at 22,436,520 kWh. The main reason for the decrease in transmission power output is due to the performance of commercial power production of Khanh Hoa, Phu Yen, Binh Dinh, Gia Lai, Dak Lak, Dak Nong, Ninh Thuan and Lam Power companies. Dong and Binh Thuan under the Central Power Corporation (EVNCPC) and the South (EVNSPC) in the first 5 months of 2021 reached 5.746 billion kWh, a low growth rate, reaching only 0.67% over the same period in 2020. Meanwhile, the electricity output of 110kV solar power, 22kV farm solar, 0.4kV rooftop solar, small and medium hydroelectricity power generation to the distribution grid of 9 Southern Central and Western Power companies Originally belonging to EVNCPC, EVNSPC increased sharply in the first 5 months of 2021, reaching 5.010 billion kWh. The transmission output of renewable energy sources, medium and small hydroelectricity from the distribution grid, in addition to meeting the load demand of the Power Companies, is also transmitted to the transmission grid at 220kv substations of the Transmission lines. Khanh Hoa, Phu Yen, Binh Dinh, Gia Lai, Dak Lak, Dak Nong, Ninh Thuan, Lam Dong, Binh Thuan in the first 5 months of 2021 are 2.090 billion kWh, which means that the renewable energy output is reversed. to the transmission grid from the distribution grid of the power companies. Thus, the transmission grid under the management of PTC3, in addition to receiving power from the 500kV system and 220kV power plants in the area to supply loads, also receives back-generated output from the distribution grid through the distribution networks. 220kV transformers connected to the national grid cause full load, overload the 220kV grid. This is also one of the reasons for the full load situation for the regional transmission grid, and at the same time brings about the paradox in the operation of PTC3 that the transmission grid managed by PTC3 always operates in a poor condition. state of full load, overload, but the commercial power output did not meet the delivery plan. This shows that there has been an inadequacy when the planned transmission power output is not counted when the renewable energy output is back to the grid. Despite such difficulties, PTC3’s employees are always committed to the power grid and are responsible for their work. They memorized the characteristics of each area of ​​the transmission grid, each compartment of the substation. In the dry season, which columns are at risk of fire due to trees in the corridor. In the rainy season, which pillars are prone to landslide. Which residential areas often fly kites, stretch canvas to dry agricultural products… Just entering the third day of the second heat wave of summer 2021, the national electricity consumption capacity at noon on June 18, 2021, has reached a new peak of 41,709 MW, the PTC3 transmission soldiers are again straining themselves with the harsh climate. of the southern central provinces and the Central Highlands, with the transmission grid always in a state of 100% full load, but not allowing problems due to subjectivity – that is the duty and also the command from the soldier’s heart. Electricity transmission. The current must be kept smoothly despite the unresolved inadequacies, because the story of the mechanism, in order to be removed, still has to be discussed, considered, must be appropriate…and the mission of the transmission soldier is Under any circumstances, the current must be maintained. Because the difficulties that PTC3 is going through is also to test people’s hearts.

EVNCPC strengthens the inspection and repair of the power grid to ensure that customers do not cut off electricity during the holidays of April 30 and May 1 this year. (Photo: Tel). Mr. Nguyen Thanh – Deputy General Director of EVNCPC said that on the occasion of April 30 and May 1 this year, employees are entitled to 4 days off, so EVNCPC forecasts the demand for electricity for domestic activities and public holidays. This will also increase. In order to ensure safe and continuous electricity supply to over 4.3 million customers in the Central region – Central Highlands, in addition to focusing on power sources for political events in 13 provinces and cities in the region, EVNCPC has a specific plan to not cut the power from 0:00 to 24h00 on April 30 and May 1, 2021. At the same time, from the time before the holiday, 13 Electricity Companies under EVNCPC have also actively worked with the local authorities to grasp the time and venue of festivals, festivals, and arrange the mode of power supply. reasonable for safe operation, reliable power, grid under normal conditions and flexible switching in fault situations. In particular, the units give priority to electricity assurance at the locations where the local political and cultural activities take place. With venues where major and important political and cultural events take place, in addition to the national grid, EVNCPC also directs its affiliated Power Companies to consider and arrange backup diesel generators; re-established the duty shift at 110kV substations without personnel on duty. The units strengthen inspection, detect and promptly handle defects of source equipment, power grids, unmanned 110kV substations, SCADA systems, luminescence to ensure safety of the corridor to prevent incidents. in electrical system operation. During this time, the units throughout EVNCPC arranged to strengthen the organization of leaders, mobile operators, operation, power repair, troubleshooting of private telecommunications network system. ; At the same time, fully preparing supplies, backup equipment, fuel, communication systems and vehicles, ready to quickly handle damage and incidents. EVNCPC requires its affiliated Power Companies to promote propaganda among the people to prevent kites flying near electric lines, metal-coated paper fireworks and throwing objects on the line causing violations. grid safety corridor; coordinate with localities and information agencies in organizing propaganda and widely dissemination of measures to use electricity safely, economically and effectively to customers using electricity. Especially on this occasion, the Center for Customer Care in Central Vietnam strengthened the call center force 19001909 to receive and well handle information related to the power supply in the area, promptly responding to requirements and problems of customers./.

Illustration According to EVNCPC, on the occasion of April 30 and May 1 this year, employees are entitled to 4 days off, so the demand for electricity for daily life and service will also increase. In addition to focusing on electricity sources for political events in 13 provinces and cities in the Central and Central Highlands, EVNCPC has specifically planned to not cut off power from 0:00 to 24h00 on April 30 and May 1 to provide providing safe and continuous electricity to over 4.3 million customers in the region. Mr. Nguyen Thanh, Deputy General Director of EVNCPC, said that before the holiday, 13 power companies under EVNCPC have actively worked with local authorities to grasp the time and location of festivals, festivals, and fathers. reasonable power supply mode for safe and reliable operation of the source, the power grid under normal conditions and flexible switching in the event of an incident. In particular, the unit gives priority to ensuring electricity at the locations where political and cultural activities take place. For venues of major and important political and cultural events, in addition to the national grid, EVNCPC directs power companies to consider arranging backup d iesel generators; re-established the duty shift at 110kV substations without personnel on duty. The units strengthened the inspection, detection and timely treatment of defects of source equipment, power grids, unmanned 110 kV substations, SCADA systems, and luminescence to ensure safety of the corridor to prevent the trouble in operating the power system. During this time, the units throughout EVNCPC organize increased duty for leaders, mobile operators, operation, power repair, troubleshooting of private and copper telecommunication network systems. sufficiently prepared materials, backup equipment, fuel, communication systems and vehicles, ready to quickly handle damage and incidents. EVNCPC requires electricity companies to promote propaganda among the people to prevent kites flying near electric lines, metal-coated paper fireworks and throwing objects on the lines that cause a corridor violation. grid safety; coordinate with localities and information agencies in organizing propaganda and widely dissemination of measures to use electricity safely, economically and effectively to customers using electricity. In particular, on this occasion, the Center for Customer Care in Central Vietnam strengthened the call center force 19001909 to receive and well handle information related to the power supply in the area, promptly responding to requirements and problems of customers.

EVNCPC increased the use of grid repair technology that did not cut off customers’ power. The units strengthen inspection, detect and promptly handle defects of source equipment, power grids, unmanned 110kV substations, SCADA systems, luminescence to ensure safety of the corridor to prevent incidents. in electrical system operation. During this time, the units throughout the EVNCPC organize increased duty for leaders, mobile operators, operation, power repair, troubleshooting of private telecommunications network system; At the same time, fully preparing supplies, backup equipment, fuel, communication systems and vehicles, ready to quickly handle damage and incidents. EVNCPC requires electricity companies to promote propaganda among the people to prevent kites flying near electric lines, metal-coated paper fireworks and throwing objects on the lines, causing a corridor violation. grid safety … Especially on this occasion, the Center for Customer Care in Central Vietnam strengthened the call center force 19001909 to receive and well handle information related to the power supply in the area, promptly responding to requests. requirements and problems of customers.

EVNCPC increased the use of grid repair technology that did not cut off customers’ power. According to Mr. Thanh, before the holiday, 13 Electricity Companies under EVNCPC have actively worked with local authorities to grasp the time and location of festivals and festivals, and arrange reasonable power supply methods to safe operation, reliable power, grid under normal conditions and flexible switching in the event of a breakdown. In particular, the unit gives priority to ensuring electricity at the locations where political and cultural activities take place. With venues of major and important political and cultural events, in addition to the national grid, EVNCPC directs Power Companies to consider and arrange standby diesel generators; re-established the duty shift at 110kV substations without personnel on duty. “The units enhance inspection, detect and promptly handle defects of source equipment, power grids, unmanned 110kV substations, SCADA systems, luminescence to ensure safety of the corridor to prevent trying to operate the power system “, Mr. Thanh said. It is known that EVNCPC requires Power Companies to promote propaganda among the people to prevent kites flying near power lines, metal-coated paper fireworks and throwing objects on the line causing violations. grid safety corridor; coordinate with localities and information agencies in organizing propaganda and widely dissemination of measures to use electricity safely, economically and effectively to customers using electricity.

PC leaders of Thua Thien Hue exchanged views on “digital transformation” for departments and divisions of the Company Ensuring information technology infrastructure Thua Thien Hue Power Company (Thua Thien Hue PC) said that in recent years, private telecommunications infrastructure (VTDR) and information technology (IT) of the Company have been invested relatively completely and synchronous, basically meeting the requirements of operating internal production as well as providing customer services on a digital platform. Specifically, the VTDR system ensures transmission channels for 100% of 110kV substations connected to the control center (TTĐK) and A3 on the SDH technology platform with a loop structure. SCADA / DMS equipment is invested synchronously, with high redundancy, processing performance to meet control requirements and automation applications on the distribution grid. The server room infrastructure ensures continuous stable operating environment and safety for VTDR and IT systems. The force of qualified staff and engineers in science and technology has been proactive in deploying and mastering the technology of IT systems. In addition, the Company has also equipped computers and office informatics quite sufficiently to meet the working requirements of employees. Thua Thien Hue PC is one of the effective implementers of common IT applications in all fields deployed by EVN and EVNCPC. In particular, the business and customer service are applied CMIS3.0 based operations, electronic invoices, contract digitization, CRM, Customer care app, level 4 public services. automatic meter collection and management RF-Spider, DSPM, HES; CPC-eOffice system was deployed to all employees, exploiting information on CPC PortalNew; The ERP system has been implemented with 16 modules; IMIS software system, digitizing project documents and conducting electronic bidding; deploying the effective application of SCADA system, initially exploiting a number of modules on DMS software. Application of OMS software to manage power outages, electronic operation logs … In addition, Thua Thien Hue PC proactively developed a number of applications for operating operations such as internal portal, CMISPortal and especially the Company was autonomous in implementing digitization and building. grid database on the basis of GIS geographic information maps…. Implementing electronic work sheets on smartphones is one of the “digital transformation” programs of Thua Thien Hue PC, helping to reduce travel time and promptly supply power to customers. Solutions for performing digital conversion With the aim of striving for PC Thua Thien Hue to soon become a digital enterprise according to the digital transformation roadmap of EVN, EVNCPC, all production and business fields are implemented and controlled in the digital environment. At the same time, digital transformation must really be the driving force and opportunity to change, improve efficiency, and affirm the position of the unit in the electricity industry as well as in the province. PC Thua Thien Hue presented 5 challenges and considered these as solutions to implement the digital transformation in the coming period. Mr. Nguyen Dai Phuc – Deputy Director of PC Thua Thien Hue said that digital transformation is a process of total and comprehensive change of individuals and organizations about the way of working and production methods based on digital technologies. However, to implement the digital transformation roadmap, Thua Thien Hue PC faces challenges, in which 5 challenges are identified and considered as key solutions to implement, including: Consciousness and will, leadership motivation: correct awareness to accept the change in the way of operating production and business activities of the unit in the digital environment. Quality of human resources: professional attitude, mastery of technology application skills of employees to meet the requirements of working in a digital environment. About professional processes: all operations of production and business activities must be performed and controlled on the system of processes, strict regulations, regularly upgraded and updated to match the solutions. digital technology. Technology solutions: applying digital-based technology solutions suitable to production capacity and conditions, promoting efficiency of production and business activities and increasing labor productivity. Digital infrastructure: Digital infrastructure must meet the operational requirements of businesses in a digital environment with high stability and good security. Diagram of confirmation steps of the electronic task sheet made by PC workers in Thua Thien Hue “The specific goal is to increase awareness about digital transformation, in order to ensure that 100% of the leaders and staff of each unit are properly aware of the concept of digital transformation. In addition, constantly improving the quality of human resources by regularly organizing IT training and testing for employees in units according to subgroups of competencies. Complete and digitize professional processes and deploy technology solutions to implement digital transformation in working fields, with special attention to digital infrastructure and information technology to implement the roadmap. digital transformation ”, Mr. Nguyen Dai Phuc added.

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./.