Correspondent Wang Dawei, Fang Qiong, and Guo Hao reported that recently, with Tianjin Chengdong Power Supply Branch passing the acceptance organized by the company, the acceptance of condition-based maintenance for 8 power supply units of Tianjin Electric Power Company, which began in mid-September, has been fully completed. All power supply units of Tianjin Company have entered the condition-based maintenance mode.
As early as 2006, Tianjin Company began special research on "condition-based maintenance strategies for transmission and transformation equipment". In 2007, Tianjin Company cooperated with China Electric Power Research Institute on the online detection project for Wuzhuang 500kV substation, focusing on tackling two major technical problems: communication protocols based on CAN fieldbus and system integration platform software supporting different types of monitoring characteristic parameters. This project was the online detection project for substations with the highest voltage level, most complete monitoring equipment, and largest scale in China at that time.
By the end of the "11th Five-Year Plan" period, Tianjin's 500kV power grid formed a strong double-ring network structure, and the 220kV power grid initially formed a layered and zoned power supply mode. The power supply capacity of the grid exceeded 11 million kilowatts, and all 220kV and below substations were unattended. Among equipment with operating years within 10 years, transformers and circuit breakers accounted for over 80%. Tianjin Electric Power Company fully applied the production management information system in 2002. Up to now, each unit has maintained 3,057 pieces of adverse working condition information, 7,221 maintenance reports, 4,414 live detection test reports, 4,295 transmission and transformation fault information items, standardized over 14,129 various defects, and 97,124 various test reports in this system. The improvement of the power grid structure, the enhancement of equipment quality, and the elevation of management level have laid a solid foundation for carrying out condition-based maintenance work.
On this basis, Tianjin Company followed the policy of "pilot first, gradual progress", combined with its own characteristics, focused on building a condition-based maintenance auxiliary decision-making system based on the production management information system, comprehensively carried out evaluation of transmission and transformation equipment and standardized on-site operations, and extended the scope of condition-based maintenance to cover all primary transmission and transformation equipment from 35kV to 500kV voltage levels. It is one of the few provincial companies that include a wide variety of equipment types and a broad voltage range.
In order to improve equipment detection and diagnostic analysis capabilities, Tianjin Company equipped relevant units with a large number of advanced condition detection instruments and test equipment at home and abroad, such as infrared imagers, GIS partial discharge ultrasonic detectors, winding deformation testers, 800kV variable frequency resonant voltage withstand devices, and 1000kV test transformers. It also installed 31 sets of online oil chromatography monitoring devices for transformers of 220kV and above. On the basis of fully promoting the PDA inspection system in 2009, the transmission and transformation PDA intelligent system was combined with the defect management module in the production management information system, and a standard defect description library was introduced. Currently, PDA inspection is widely used in substations and transmission lines. On the basis of Tianjin High Voltage Power Supply Company passing the acceptance of State Grid Corporation of China, Tianjin Company further promoted the normalized management of condition-based maintenance. Based on equipment condition evaluation, each power supply unit of Tianjin Company reduced unnecessary equipment testing and maintenance, generally improving the pertinence and effectiveness of equipment maintenance, and completed acceptance within 6 months. Taking the High Voltage Company as an example, in 2009, it evaluated 11,255 sets of 35kV and above substation equipment and 1,045 transmission lines. Through condition-based maintenance, equipment outage time for maintenance was greatly reduced, and the pertinence of equipment maintenance was improved.
It is learned from Polaris Energy Storage Network that Gotion High-tech won the bid for the State Grid's multifunctional mobile energy storage charging vehicle project. Gotion High-tech will provide liquid-cooled battery boxes and "PowerOcean" energy storage system products for the project. It is reported that the project is implemented by NARI Group, a scientific research and industrial unit directly under State Grid Corporation of China, with a project specification of 9.6MWh. The "PowerOcean" energy storage product provided by Gotion High-tech is its third-generation energy storage product, which adopts advanced liquid cooling system.
To help achieve the "dual carbon" goal, the Baihetan-Jiangsu UHV DC project was fully connected. On May 19, with the completion of the high-end part of the Yucheng UHV converter station in Jiangsu, the Baihetan-Jiangsu ±800kV UHV DC transmission project was fully connected and entered the live commissioning stage. It is expected that by the end of June, large-scale clean hydropower from Sichuan will be transmitted to Jiangsu through this line. The Baihetan-Jiangsu ±800kV UHV DC transmission project starts from Liangshan Prefecture in Sichuan Province and ends in Suzhou City, Jiangsu Province, passing through Sichuan, Chongqing, Hubei, and other regions.
State Grid: Determine ten key scientific and technological projects, covering areas such as coordinated optimization and dispatching of coal power and new energy power generation.
On May 19, the video conference for signing the responsibility statement for major scientific and technological projects of the State Grid's new power system scientific and technological research action plan 2022 special project was held. The meeting thoroughly studied and implemented the important speeches and instructions of General Secretary Xi, implemented the decisions and deployments of the Party Central Committee and the State Council on building a new power system, further unified thinking, clarified tasks, firmly shouldered responsibilities, and made every effort to tackle core technologies of the new power system and promote clean and low-carbon energy.
Signing of responsibility statements for major scientific and technological projects of the State Grid's new power system scientific and technological research action plan 2022 special project: The ten key projects have a research and development investment of 200 million yuan.
On May 19, the video conference for signing the responsibility statement for major scientific and technological projects of the State Grid's new power system scientific and technological research action plan 2022 special project was held. The meeting thoroughly studied and implemented the important speeches and instructions of General Secretary Xi, implemented the decisions and deployments of the Party Central Committee and the State Council on building a new power system, further unified thinking, clarified tasks, firmly shouldered responsibilities, and made every effort to tackle core technologies of the new power system and promote clean and low-carbon energy.
China Electric Power Research Institute Co., Ltd. and Huawei Technologies Co., Ltd. IPv6 large-scale deployment and application case 1. Case overview 1.1 Background With the deployment and deepening of the national "dual carbon" energy transformation strategy, the power grid, as an important channel and hub connecting power sources and user loads, will increase the consumption of distributed clean energy such as photovoltaic and wind power. State Grid Corporation of China has timely proposed building an integrated power source, grid, load, and storage system and multi-energy complementary coordinated development.
State Grid Corporation of China implements 12 categories and 121 mixed-ownership reform projects, with a cumulative introduction of 48.8 billion yuan of social capital since 2021.
Polaris Power Network has compiled and summarized the listed companies under the two major power grid companies, and sorted out their company profiles and performance in the previous year for readers! State Grid Corporation of China NARI Technology Co., Ltd. In 2021, NARI Technology achieved annual operating revenue of 42.411 billion yuan, an increase of 10.15% year-on-year, and realized net profit attributable to the parent company of 5.642 billion yuan, an increase of 16.30% year-on-year. Operating conditions of the company's main participating and holding companies: State Grid Information & Communication, formerly known as...
[Inventory] Listed companies under State Grid and China Southern Power Grid and their operating conditions - Sorting of energy central state-owned enterprise listed companies (I)
On May 7, the restructuring draft of Wenshan Power, a listed company under China Southern Power Grid, was finalized. According to the draft, Wenshan Power plans to inject 100% equity of China Southern Power Grid Peak Regulation and Frequency Modulation Co., Ltd. through asset replacement and issuance of shares to purchase assets, and will transfer out all original businesses such as electricity sales and power design. At that time, Wenshan Power will become the first listed company mainly engaged in peak regulation and frequency modulation, and also the only platform company for pumped storage and energy storage business of China Southern Power Grid. Taking this opportunity, Polaris...
It is learned from Polaris Energy Storage Network that on May 16, State Grid Jiangsu Integrated Energy Service Co., Ltd. signed a "Strategic Cooperation Agreement" with China Tianying Inc., reaching strategic cooperation on gravity energy storage technology research and project development. According to incomplete statistics, State Grid has previously laid out 9 energy storage technologies. Exploration of gravity energy storage technology: On May 16, 2022, China Tianying and State Grid reached strategic cooperation on gravity energy storage technology research, etc. Both parties will establish a collaboration team...
SGB provides iBIT dry-type transformer solutions for China's first undersea data center (UDC), boosting green IDC.
In March 2022, SGB successfully won the bid for the Haianxin Undersea Data Center (UDC) project, providing iBIT dry-type transformer solutions for the project, helping optimize power, save energy, and improve efficiency for China's first undersea data center project. After more than one month, SGB successfully completed the supply, winning high recognition and praise from users with high-quality products, rapid response, and comprehensive services. Haianxin was established in 2001 and is the only domestic company with "smart ocean + intelligent navigation...
Sanbian Technology: In 2021, net profit was 18.5645 million yuan, a year-on-year decrease of 41.48%.
The power transmission and distribution and control equipment industry is one of China's important strategic industries. Power grid construction, energy saving in transmission and transformation, and promotion and application of environmental protection technologies are among the key areas encouraged by the state. As important basic configurations in the above fields, power transmission and distribution and control equipment are also encouraged and supported by relevant national policies. In recent years, China's smart grid construction has driven rapid growth in investment in the power transmission and distribution and control equipment industry, and the number of enterprises participating in industry competition has increased.
On May 13, the live impact of the No. 2 main transformer of the 220kV Yacheng Substation in Xiapu, Ningde, Fujian was successful, marking the early completion and commissioning of the 220kV Yacheng Substation, a key project in Fujian Province and a key project for Ningde Power Supply Company to ensure summer peak power supply. Yacheng Substation is the 20th 220kV substation in Ningde and the 2nd in Xiapu. The project started in March 2021, with the construction of 1 transformer of 24,000 kVA, 3 outgoing lines of 220kV, and 6 outgoing lines of 110kV. The project...
After 16 days and 1,735 kilometers of water and land transportation, on the 17th, the first "giant" main transformer arrived at Wuhan 1000kV Substation, and the new construction project of Wuhan 1000kV Substation fully entered the equipment installation stage, laying the foundation for the project to be put into operation on time. It is understood that Wuhan 1000kV Substation has a total of 7 transformers with a total capacity of 6,000 MVA, which are the core equipment of the substation. The main transformer transported this time is 9.34 meters long, 5.3 meters wide, and 5 meters high, with a total weight of...
State Grid Sichuan Electric Power's first distribution network materials agreement inventory procurement in 2022 (applicable to prequalification sections)
State Grid Sichuan Electric Power Company's first distribution network materials agreement inventory procurement in 2022 (applicable to prequalification sections) Bidding number: 1922AA 1. Bidding conditions The bidder for this bidding project is State Grid Sichuan Electric Power Company, and the bidding project funds come from the enterprise's own funds, with a contribution ratio of 100%. The project has met the bidding conditions, and now public bidding is conducted for the procurement of this project. The bidder entrusts State Grid Sichuan Bidding Co., Ltd. (hereinafter referred to as "the bidding...
It is learned from Polaris Power Transmission and Distribution Network that recently, the Jiangsu Provincial Development and Reform Commission and the Jiangsu Provincial Department of Industry and Information Technology issued a notice on implementing punitive electricity prices and differential electricity prices for enterprises with excessive energy consumption and enterprises using eliminated equipment. The document shows that from May 1, 2022, punitive electricity prices will be implemented for the electricity used by production lines of products of 4 enterprises with excessive unit product energy consumption (if the enterprise's self-owned power plant has excessive energy consumption, it will be implemented according to the plant's electricity consumption, collected by the power grid enterprise); and for 1...
It is learned from Polaris Power Transmission and Distribution Network that on May 13, the live impact of the #2 main transformer of Yacheng 220kV Substation in Xiapu, Ningde was successful, and it was transferred to 24-hour trial operation, marking the smooth start of the Yacheng 220kV power transmission and transformation project, a key project in Fujian Province! It is understood that this is the second 220kV substation in Xiapu County. The total investment of the project is 150 million yuan. The substation plans to cover an area of 24 mu, with the construction of 1 main transformer with a capacity of 240 MVA, and the construction of 2 new 220kV transmission lines...
It is learned from Polaris Power Transmission and Distribution Network that recently, the Development and Reform Bureau of Putuo District, Zhoushan City approved the 2022 distribution network renovation and new construction project in the Putuo area of Zhoushan. Project name: 2022 distribution network renovation and new construction project in Putuo area, Zhoushan. (Project code: 2205-330903-04-01-623701) Project construction location: Donggang, Shenjiamen, Zhanmao, Taohua, and Dongji in Putuo, Zhoushan. Construction content and scale: The main content of the project is the renovation and new construction of the distribution network in Putuo, Zhoushan...
