“AI” smart grid adds impetus to rural revitalization

(Photo by Ding Wenkang)

On May 6, State Grid Hefei Power Supply Company organized construction workers to carry out rural power grid upgrades in Linchengwei Village, Jinniu Town, Lujiang County. At the same time, they installed smart distribution network switches to speed up the construction of digital power grids. The county distribution network officially entered the " In the "AI" era, rely on smart grids to promote high-quality development of local economies.

It’s late spring when all the peach blossoms are gone, and it’s already summer before I realize it. On May 6, it was the beginning of summer. In Linchengwei Village, Jinniu Town, Lujiang County, Anhui Province, the wheat fields were slightly yellow. Electric power construction workers in blue work clothes shuttled through the fields. Newly erected power supply lines and The paths in the fields intersect with each other. This is where the State Grid Hefei Power Supply Company organized construction workers to upgrade the rural power grid on the 10 kV Jinniu 114 line.

With the rapid development of Hefei's economy, Lujiang County, as the "back garden" of Hefei, the provincial capital, has seen the living standards of township residents continue to improve, and the intelligent construction of rural power grids has received more and more attention. Investment in distribution network smart switches can effectively improve the quality of life of farmers and the level of economic development in rural areas, and can also further promote the progress and development of cities. In order to support the revitalization of rural industries and improve the power grid structure, State Grid Hefei Power Supply Company has identified key rural areas and weak links in power supply, continuously optimized and upgraded the rural power grid structure, and fully met the power demand of the rapid development of the rural economy in Lujiang County.

Intelligent switch for distribution network to establish a powerful terminal

A major feature of this line is the intelligent distribution network. Different from previous conventional transformations, it is a newly installed 10 kV 114 line. A total of 9 intelligent automatic distribution switches are installed on this line. When a line failure occurs in bad weather, the intelligent distribution switch fault information is automatically analyzed and judged, and the fault area is quickly located. Through the automatic remote control switch of the distribution system, the fault area of ​​the distribution line is quickly located and isolated, and the power supply is automatically restored to the non-faulty area. Improve power supply reliability and reduce the adverse impact on customers due to large area and long power outages due to faults. After the fault is repaired, the power can also be restored remotely through the system. Compared with the previous need to manually deliver power to the site, it is more time-saving, labor-intensive and efficient, and greatly reduces the power supply pressure on the power grid during the summer peak.

"Today's construction content is relatively complex. A total of 16 people were dispatched to carry out construction at 6 points simultaneously, and the power supply of 6 stations on the original line was changed to the new line. After the Jinniu 114 10 kV line is put into operation , will replace the old lines and be responsible for providing power services to Hushao, Weiba, Jianjiang and other villages in Jinniu Town. In order to reduce the impact on users in surrounding areas during the construction process, we specially dispatched live work teams and medium-voltage power generation vehicles to provide high-quality While promoting the upgrading of rural power grids, we must also ensure "zero awareness" of electricity consumption for users in surrounding areas." According to the person in charge of the on-site work, this rural power grid upgrade involved a total of about 2,600 households in 3 villages, and the transformed lines spanned the population Dense areas have long spans and large scopes, and there is great pressure on security, power outages and other controls. In order to minimize the impact of the operation on residents and ensure the smooth implementation of the project, State Grid Hefei Power Supply Company planned in advance, carefully deployed, and actively dispatched, and scientifically and rationally formulated a construction plan for live operations and medium-voltage power generation vehicles to maintain power supply, so as to minimize the losses caused by transformation. Impact on surrounding power customers.

Distribution network automation self-healing function builds intelligent brain

While State Grid Hefei Power Supply Company accelerates the construction of intelligent distribution network hardware, it also simultaneously strengthens the software strength of the intelligent distribution network system. Please strengthen monitoring, because Baishan has become line 105, Shishan has become government line 107, and the automatic self-healing function of the distribution network has been put in place. "Following the order from the dispatcher of the State Grid Hefei Power Supply Company, other personnel on duty closely monitored the real-time status and data feedback of each power supply line on the large electronic screen. The operating conditions of the line equipment showed that everything was normal, marking that the State Grid Hefei Power Supply Company After more than two months of unremitting efforts, the company successfully implemented the automatic self-healing function of the distribution network of the Baishan-Baishan Line 105 and the Shishan-Gongwu Line 107. This is the first line in the county of Hefei to have the distribution network automation self-healing function. It represents The automation construction and application of county distribution network has entered the "AI" era.

"This function is just like the anti-virus software in the computer. When a fault occurs on the distribution line, the system can automatically detect the location of the fault point and isolate it, and at the same time restore the power supply to the non-faulty area. Compared with the previous average Each distribution network fault location and repair time is shortened by 30-40 minutes or more." According to the staff, the investment in the automatic self-healing function of the distribution network, through the cooperation of the distribution terminal and the main station, when a line failure occurs, the main station The station analyzes and judges the protection opening and closing signals uploaded by the terminal, determines the fault area, isolates the fault point through automatic remote control of field equipment equipped with the main station system, and restores power supply to non-fault areas. The power outage time is shortened from minutes to seconds, effectively It reduces the number of households during a power outage, improves the reliability of power supply, eliminates the need for manual fault diagnosis throughout the entire process, and enables rapid processing. It also greatly alleviates the problem of the carrying capacity of the power supply station.

Remotely prepare self-injection equipment to inject power supply tonic

"The 35 kV Zhuanqiao 364 switch received the remote closing command and closed successfully!" State Grid Hefei Power Supply Company organized employees to carry out the final debugging of the remote automatic switching device at the 35 kV Zhuanqiao substation. With the putting into operation of this device, four substations, led by the 35 kV Zhuanqiao substation, became the first substations in the Lujiang area equipped with remote automatic switching devices. At the same time, Lujiang County achieved full coverage of a total of 24 substations in the county with automatic switching devices. This improves the reliability of power supply within the coverage area of ​​the substation.

The standby automatic switching device is the abbreviation of the backup power automatic switching device. When the working power supply is disconnected due to a power system failure or other reasons, the backup power supply can be quickly automatically put into work, or the equipment that has been powered off can be automatically put into other devices. A normal working power supply, an automatic device that enables users to quickly restore power.

In order to carry out the debugging work of remote standby and automatic switching, State Grid Hefei Power Supply Company has successively completed the laying of secondary cables for remote standby and automatic switching, secondary line connection, device logic verification, optical fiber link communication, and device setting and setting verification. , Signal circuit improvement, circuit breaker transmission and other work. In order to ensure the smooth implementation of various tasks, State Grid Hefei Power Supply Company has conducted on-site inspections and formulated "three measures and one case" measures. We must strictly implement safety management requirements at the production site and never relax in the pursuit of "safety first" to ensure that all work is always within control.

The “teaching and mentoring” mechanism cultivates “general practitioners”

"After the automatic transmission device is put into operation, it will effectively save manpower and material resources, while ensuring the quality of power supply and achieving the goal of improving quality and efficiency. This technology is very important. We will simultaneously focus on 'helping and guiding' during the development process. , let the old masters teach their skills to young people." According to the person in charge of the on-site work, in order to allow young employees to quickly master professional skills and improve their professional capabilities, in the process of carrying out this work, the company has organized professional transportation inspection teams. Members went to the 35 kV Shuangmiao substation to conduct skills training video viewing activities. Party branches and committees participated in the whole process, and party members and comrades took the lead to independently implement the self-investment and transformation project through online live broadcast. In accordance with the city and county integrated "team and team compound talent cultivation" principle, young key employees were trained to review and test " General Practitioner" ability.

In recent years, with the development of science and technology and artificial intelligence, smart grids have emerged. State Grid Hefei Power Supply Company has increased investment in intelligence in professional fields such as regulation, transformation, transmission, and distribution to upgrade and transform rural power grids. , line technical renovation and other work as opportunities to accelerate the transformation of the power grid to digitalization. As the nerve endings of the power grid, the distribution network is connected to the main power grid and connected to thousands of households. With the changes in the energy supply structure, the requirements for high reliability of the distribution network are increasing day by day. Since this year, State Grid Hefei Power Supply Company has deepened the construction and application of distribution automation, continued to improve the coverage of primary and secondary integration equipment and intelligent terminals in the distribution network, continuously improved the automation application functions of the distribution main station, and laid a solid foundation for the investment in the distribution network automation self-healing function. Solid foundation. It has achieved full coverage of standby automatic input devices in substations, and established lines equipped with automatic input and self-healing functions. It has become the first line to realize this function in Chaohu and four counties in the Hefei area. In the next step, State Grid Hefei Power Supply Company will increase its efforts in digital power grid planning and construction, combine the regional characteristics of Lujiang towns, and build a smart grid that meets the power consumption characteristics of the Lujiang area. At the same time, it will carefully summarize successful experiences and form a smart grid that can be replicated and promoted. The plan will be promoted throughout the county and rely on smart grids to promote high-quality development of the county economy.

[This article is reprinted from the People's Political Consultative Conference, and the copyright belongs to the original author] Editor: Wang Yuting

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