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.

Customers are using the electricity customer management system built by EVNICT. Hoang Dung/BNEWS/VNA Specifically, the Corporation promotes the application of digital technology to innovate and improve the management and operation process of the power system; Design experiences to attract more and more customers to interact on digital channels, enhance analytics to understand customers. The Corporation also improves processes, optimizes corporate governance, enhances governance and data-driven decision-making; Build a digitally savvy, conscious and skilled workforce. At the same time, build a strong and flexible digital ecosystem, maximize shared services and data, and enhance security. This transformation, according to EVNSPC’s General Director, aims to improve management capacity and efficient exploitation and operation of the power grid; improve the quality of customer service in the field of electricity business. Besides, improving project management capacity in the field of construction investment; improve internal management capacity; improve telecommunications infrastructure capacity, apply digital technology platforms. In order to carry out the set tasks, EVNSPC has developed specific plans and solutions. One of the remarkable solutions being implemented by the Corporation is the successful deployment of interconnected and integrated shared applications of the Electricity of Vietnam (EVN) according to the roadmap, and at the same time studying develop specific software to meet the requirements of sustainable development of EVNSPC. Along with the coordination to complete the overall monitoring system of information technology and telecommunications infrastructure, used exclusively as a capacity building tool for management consulting and administration on the application and development of science and technology in Vietnam. At all levels throughout EVNSPC, the Corporation also ensures information safety and security at all levels, meeting the readiness for the digital transformation roadmap for the period 2021 – 2022./

ENVSPC will join FPT in digitizing and digitalizing many processes. Southern Electricity Corporation (EVNSPC) and FPT Corporation have officially signed a strategic cooperation agreement in the field of digital transformation. This is part of the plan to turn EVNSPC into a digital enterprise by 2025. According to the cooperation agreement, EVNSPC will join FPT in digitizing and digital transformation of power distribution business operations management processes, contributing to improving the quality and efficiency of distribution management and business. electricity distribution, reduce costs, improve the competitiveness of the company. Mr. Nguyen Phuoc Duc – General Director of EVNSPC affirmed: “Digital transformation is the most important key program of EVNSPC, a strong driving force for EVNSPC to continue to improve its competitiveness, promote its growth and increase credibility with customers. We are determined to become a digital enterprise, ready to accept and test new ideas and technologies, make points, do it quickly, then evaluate and replicate; promote innovation”. Towards this goal, FPT will propose a number of digital transformation focuses that can be implemented right at EVNSPC, closely following the unit’s 5 key digital transformation goals for the period 2021 – 2022 towards 2025, including including: Accelerating the application of digital technology to innovate and improve the management and operation process of the power system; Design experiences to attract more and more customers to interact on digital channels, enhance analytics to understand customers; Improve processes, optimize corporate governance, enhance governance and data-driven decision making. EVNSPC also plans to build a strong and flexible digital ecosystem, maximize services, shared data, enhance security and so on. Mr. Nguyen Van Khoa – General Director of FPT Corporation expressed that EVNSPC has a great vision and determination to innovate for development. “FPT will study and advise on a suitable and effective digital transformation roadmap and commit to accompany EVNSPC on the digital transformation roadmap (…), contributing to turning EVNSPC into a digital enterprise soon” – Mr. Khoa said. The EVNSPC’s digital transformation program is one of the key themes of EVN Group’s 2021 which is “Digital transformation in the Vietnam National Electricity Corporation”. Over the years, EVNSPC has prioritized investment in information technology in improving business operations and has prepared for the digital transformation strategy. It is known that EVNSPC has deployed many technology solutions to serve electricity customers, EVNSPC has provided 100% of online electricity services to customers on website www.cskh.evnspc.vn and through Portal National public service, 21/21 Southern member Power Company has connected with the Public Administration Center in the “one-stop shop” method to quickly respond to people’s electricity demand . In system operation, EVNSPC has deployed SCADA system, built on 230 unmanned 110kV substations synchronously connected with remote control centers at units, initially building GIS maps and data Big data, thereby successfully building a series of IT application systems to improve business-business efficiency in the Corporation such as: Customer Management Information System (CMIS) , Remote metering data collection and management system (MDMS), Power purchase and sale monitoring system in the field of business (MDAS); Power and Grid Engineering Management System (PMIS), Grid Reliability Management System (OMS); Supervisory control and data acquisition system (SCADA); GIS system 110kV, GIS 220kV; Safety monitoring system through images in the field of technical and safety management;…

ENVSPC will join FPT in digitizing and digitalizing many processes. Accordingly, EVNSPC will work with FPT to digitize and digitally transform power distribution business operations management processes, contributing to improving the quality and efficiency of electricity distribution business and management. reduce costs, improve the competitiveness of the company. FPT will propose a number of digital transformation focuses that can be implemented right at EVNSPC, closely following the unit’s 5 key digital transformation goals for the period 2021 – 2022 towards 2025, including: Accelerating application digital technology to innovate and improve the management and operation process of the power system; Design experiences to attract more and more customers to interact on digital channels, enhance analytics to understand customers; Improve processes, optimize corporate governance, enhance governance and data-driven decision making; Building a strong and flexible digital ecosystem, maximizing shared services and data, enhancing security and privacy… Thereby helping EVNSPC become a strong unit in EVN Group in terms of transformation. change numbers and operate on digital platforms; save costs, improve service capacity and labor productivity. EVNSPC and FPT Corporation signed a strategic cooperation agreement on digital transformation, realizing the goal that ENVSPC will become a digital enterprise by 2025. Mr. Nguyen Phuoc Duc, General Director of Southern Power Corporation affirmed: “Digital transformation is the most important key program of EVNSPC, a strong driving force for EVNSPC to continue to improve its competitiveness and development. promote growth and increase prestige among customers. We are determined to become a digital enterprise, ready to accept and test new ideas and technologies, make points, do it quickly, then evaluate and replicate; promote innovation. We believe that the synergy between FPT’s capacity, experience in digital transformation as well as the knowledge of the electricity industry and the highest determination of EVNSPC will quickly and effectively promote digital transformation programs, bringing new benefits to customers. real value for customers”. Mr. Nguyen Van Khoa, General Director of FPT Corporation shared: “As a partner of EVN for many years, FPT realizes that EVNSPC has a great vision and determination to innovate to develop even more strongly in the future. This milestone is the beginning of specific actions and specific proposals to effectively solve each problem of EVNSPC that the two sides jointly embarked on. FPT will research and advise on a suitable and effective digital transformation roadmap and commit to accompanying EVNSPC on the digital transformation roadmap. I believe this cooperation will bring positive results in the coming time, contributing to making EVNSPC a digital enterprise soon.” The EVNSPC’s digital transformation program is one of the key themes of EVN Group’s 2021 which is “Digital transformation in the Vietnam National Electricity Corporation”. Over the years, EVNSPC has prioritized investment in information technology in improving business operations and has prepared for the digital transformation strategy. FPT proposes a number of digital transformation centers that can be implemented at EVNSPC. EVNSPC has implemented many technological solutions to serve electricity customers, EVNSPC has provided 100% of online electricity services to customers on the website www.cskh.evnspc.vn and through the National Public Service Portal, 21/21 Southern Regional Power Companies have connected with the Public Administration Center in the “one-stop shop” method to quickly respond to demand. electricity use of the people. In system operation, EVNSPC has deployed SCADA system, built on 230 unmanned 110kV substations synchronously connected with remote control centers at units, initially building GIS maps and data Big data, thereby successfully building a series of IT application systems to improve business-business efficiency in the Corporation such as: Customer Management Information System (CMIS) , Remote metering data collection and management system (MDMS), Power purchase and sale monitoring system in the field of business (MDAS); Power and Grid Engineering Management System (PMIS), Grid Reliability Management System (OMS); Supervisory control and data acquisition system (SCADA); GIS system 110kV, GIS 220kV; Safety monitoring system through images in the field of technical and safety management;… With the orientation and approach according to the roadmap set out by the Government and EVN, EVNSPC wishes to gradually bring digital transformation into all areas of production and business activities, daily supply to increase labor productivity, save cost savings in production and business activities and synchronous administrative reform at all levels in order to implement a roadmap to quickly and efficiently apply technology to serve customers using electricity services. As a reliable strategic partner of Vietnam Electricity, FPT has been advising on building a digital transformation roadmap and dozens of large and small projects for Vietnam Electricity and EVN’s member companies such as: EVNHANOI, EVNHCM, Northern EVN, EVN ICT… In early 2021, FPT successfully and on time implemented one of the two projects to provide software to digitize the FPT Spro process to digitize the dispatching work for the EVNHANOI Power System Dispatch Center. This is the initial result of the “EVNHANOI digital transformation” journey that EVNHANOI and FPT IS signed a cooperation agreement in December 2019. In addition, as part of the series of activities of the Consulting Project on Building a Digital Transformation Roadmap for EVNHCM to be signed at the end of 2020, FPT has also conducted two digital transformation awareness training sessions for EVNHCM.

Southern Electricity Corporation signed a cooperation agreement with FPT on digital transformation. Photo: FPT May 25th in City. In Ho Chi Minh City, Southern Electricity Corporation (EVNSPC) and FPT Joint Stock Company officially signed a strategic cooperation agreement in the field of digital transformation in the electricity business and management system. implementation, realizing the goal that EVNSPC will become a digital enterprise by 2025. According to FPT, this event continues to affirm the effective cooperation relationship between FPT and EVNSPC in particular and Electricity of Vietnam (EVN) in general. EVNSPC will join FPT in digitizing and digital transformation of power distribution business operations management processes, contributing to improving the quality and efficiency of power management and distribution business, reducing costs, and improving power distribution. high competitiveness of the company. FPT will propose a number of digital transformation focuses that can be implemented right at EVNSPC, closely following the unit’s 5 key digital transformation goals for the period 2021 – 2022 towards 2025, including: Accelerating application digital technology to innovate and improve the management and operation process of the power system; design experiences to attract more and more customers to interact on digital channels, enhance analytics to understand customers; improve processes, optimize corporate governance, enhance governance and data-driven decision-making; building a strong, flexible digital ecosystem, maximizing shared services and data, enhancing security and privacy… Thereby helping EVNSPC become a strong unit in EVN in terms of digital transformation and operation on digital platforms; save costs, improve service capacity and labor productivity. According to Mr. Nguyen Phuoc Duc, General Director of Southern Power Corporation, digital transformation is the most important key program of EVNSPC, a strong driving force for EVNSPC to continue to improve its competitiveness and promote its speed. growth and reputation among customers. EVNSPC is determined to become a digital enterprise, ready to accept and test new ideas and technologies, make points, do it quickly, then evaluate and replicate; promote innovation. Mr. Nguyen Phuoc Duc believes that the synergy between FPT’s capacity, experience in digital transformation as well as understanding of the electricity industry and EVNSPC’s highest determination will quickly and effectively promote digital transformation programs, bringing provide real value to customers. Mr. Nguyen Van Khoa, General Director of FPT expressed his belief that this cooperation will bring positive results in the coming time, contributing to making EVNSPC a digital enterprise soon. EVNSPC’s digital transformation program is one of EVN’s key themes in 2021, which is “Digital transformation in the Vietnam National Electricity Corporation”. Over the years, EVNSPC has prioritized investment in information technology in improving business operations and has prepared for the digital transformation strategy. As a reliable strategic partner of Vietnam Electricity, FPT has been advising on building a digital transformation roadmap and dozens of large and small projects for Vietnam Electricity and its member companies. such as the Hanoi Electricity Corporation (EVNHANOI), the City Electricity Corporation. Ho Chi Minh City (EVNHCM), Northern Electricity Corporation – Northern EVN, Electricity Telecommunications and Information Technology Company (EVN ICT)… In early 2021, FPT successfully and on time implemented one of the two projects to provide software to digitize the FPT Spro process to digitize the dispatching work for the EVNHANOI Power System Dispatch Center. This is the initial result of the “EVNHANOI digital transformation” journey that EVNHANOI and FPT IS signed a cooperation agreement in December 2019. In addition, as part of the series of activities of the Consulting project on building a digital transformation roadmap for EVNHCM to be signed at the end of 2020, FPT has also conducted two digital transformation awareness training sessions for EVNHCM./.

Professional solar battery cleaning worker for a project in the city. Ho Chi Minh Meanwhile, according to engineer Thanh, the current method of cleaning the panels is mostly done by investors, most of them are using water, available facilities and using a hose to wash them, this method is not technically correct. in terms of maintenance, because many areas have water contaminated with alum, hard water, there is a lot of organic matter, more dissolved metals… leading to further damage to the panels. “The effectiveness of the project apart from equipment, materials, installation techniques, the operation and maintaining the efficiency of the system is related to the cleaning of the panels. Keeping the panels clean is the key to maximizing output, increasing economic efficiency for investors, ”Thanh said. Solar power is booming in Vietnam, especially household investment packages, concentrated in remote and island areas in the South. According to the Vietnam Electricity (EVN), by the end of 2020, the total capacity of renewable energy sources will be 17,430 MW (up 11,780 MW compared to 2019) and accounting for 25.3%. . In which, there are about 8,000 MW of rooftop solar power and more than 8,400 MW of large farm solar power. Thus, according to investors’ calculations, the whole country currently has no less than 30 million solar panels operating in the whole system and will increase when many projects are under construction and about to be operational. Seeing this potential, a number of businesses in the South have added new services, which are professional cleaning of solar panels and package maintenance for solar power systems. the investors. Mr. Le Tran Khanh Vy – General Director of Nhat Hung Environmental Technology Co., Ltd. (Thu Duc City) – said that in the face of more and more investors installing solar equipment, the company opened more professional solar battery cleaning service, currently hundreds of customers across the country have signed contracts to participate in cleaning and maintaining solar power systems with this package. To meet the needs of customers, especially solar power investment packages in industrial form, the company is forced to professionalize by producing standard cleaning solutions, investing in specialized cleaning equipment. and has a team of professional staff in charge. “The solution that the company offers is to keep batteries clean by cleaning them regularly and properly; Check the water source, if the water source is contaminated with alum, hard water, contains a lot of organic matter, lots of dissolved metals, it must be handled; choosing a cleaning solution specialized for cleaning panels, because now there are domestically produced products with appropriate and safe prices, ”said Mr. Vy. On the market, there are specialized solutions for cleaning solar cells According to electricity experts, at present, many solar power projects are invested billions of dong, even more money, but the stage of battery cleaning and system maintenance is less concerned by investors properly. This leads to a reduced lifespan of the building, especially the heat collection efficiency of the panels is low, while if cleaned and maintained properly, the economic efficiency is not small. Mr. Huynh Duc Tien, living in Hoc Mon district, city. Ho Chi Minh has just signed a package contract with a company specializing in solar battery cleaning and maintenance of the solar power system with an investment of more than 1.2 billion VND nearly 2 years ago. Mr. Tien said that the cleaning company has specialized solutions, tools and techniques, so it is handed over to them for management because the cost is not much and it saves time.