This year, although the load of the Beijing Power Grid hit a record high for four consecutive times, the overall operation of the power grid was stable. This is not unrelated to the State Grid Beijing Electric Power Company's all-round construction of smart grids from grid planning, design, construction, operation, and services. Beijing Electric Power is committed to building a world-class energy Internet company, and innovatively applying advanced technologies such as the first domestic "integrated dual-core" power distribution automation system, intelligent inspection equipment, and intelligent service platform, and key areas such as the core area of ​​the capital and the sub-central core area The power grid realizes precise operation and maintenance management and control, and the reliability of power supply exceeds 99.9999%.
As we all know, the efficient operation of smart cities is inseparable from smart grids, which can be described as the "aorta" of smart cities. With the continuous construction and improvement of Beijing's smart grid in recent years, State Grid Beijing Electric Power has taken the lead in building the world's highest standard smart grid demonstration.
The Beijing City Sub-center Demonstration Project covers almost all aspects of Beijing Electric Power's smart power distribution network, and the world-class high-end smart power distribution network has emerged in the city's sub-center.
In order to ensure the smooth relocation of the administrative office area of ​​the Beijing City Sub-center this year, the power grid supporting project has been completed ahead of schedule. This is currently the most advanced smart city power distribution network in my country. The advanced power supply method adopted by Beijing Electric Power ensures that each switch station has power from 3 different directions. The reliability of power supply exceeds that of Singapore and Paris. The reliability of power supply is 99.9999%, and the average annual power outage time can be less than 21 seconds.
Lai Xiangsheng, deputy general manager of State Grid Beijing Electric Power, told reporters: “In less than two and a half years, Beijing Electric Power completed all the supporting power facilities construction tasks including the main distribution network construction and power relocation and transformation. The demonstration area has built a world-class grid structure, selected world-class high-end equipment, and built a world-class high-end smart distribution network demonstration area that innovatively applies more than 10 international top-level grid technologies."
Take the underground integrated pipe gallery in the core area of ​​the administrative office of the Beijing City Sub-center as an example, where municipal pipelines such as water, gas, electricity, and heat are assembled, and the power cabin is part of it. "The structure of the power cabin has been specially designed and the service life can reach 100 years; the power cabin is equipped with self-developed, world-advanced manned inspection equipment, which completely solves the difficulty in transportation of emergency repair materials and the labor intensity of manual inspection of the power cabin. Major issues; each pipe gallery is equipped with inspection and fire extinguishing robots. The inspection robots are equipped with infrared temperature measurement, visible light video real-time monitoring, toxic gas over-limit alarms and other operational and environmental real-time monitoring functions." State Grid Beijing Tongzhou Power Supply Company Deputy General Manager Shang Bo introduced.
The construction of supporting power grids for Beijing's new airport, which was launched last year, highlights the concept of "smart construction sites and green construction sites". Taking the construction of the Zhanghua substation in the new airport as an example, the most advanced domestic technology is used in multiple links such as the selection of power transmission and transformation equipment, construction and installation, and project management and control. Beijing Electric Power has introduced the design and construction of the main assembly steel structure of the substation. According to the design of the substation, the main steel structure is produced from the factory and transported to the site for assembly. Compared with the installation of ordinary concrete structures, it can save nearly 2 months of construction period and greatly Reduce the dust on site. At the same time, the first "smart construction site" management method in the power industry is also applied in the construction of Zhanghua substation, and the construction progress is intelligently controlled through advanced technical means such as visualization, informatization, and mobile Internet. For example, the "video monitoring module" can be used to track key links such as construction site operation dynamics, implementation of safety measures, and scaffolding in real time to ensure the construction quality of key nodes.
"We have made full use of the'Internet +'technology, and have successively put into operation the intelligent transmission and transformation intelligent prevention and control system and the intelligent construction site system with intelligent image recognition technology. At present, it has covered 42 substations in Beijing, all transmission lines in the plains, and all the projects under construction. Project site." introduced by Cai Hongjun, director of the Beijing Electric Power Construction Department of State Grid.
In the construction of the supporting grid for the 2022 Winter Olympics, the Zhangbei renewable energy flexible DC grid test demonstration project with the highest voltage level and the largest transmission capacity in the world is in full swing. After the completion of the project, the Zhangjiakou area will be cleaned of wind power and solar energy. The supply of energy to the Beijing Northern Power Grid has significant comprehensive benefits and strategic significance for promoting energy transformation and green development, and practicing and serving the Beijing low-carbon and green Winter Olympics.
The reliability rate of power supply in the core area of ​​the capital will reach 99.9999%In 2014 and 2017, General Secretary Xi Jinping visited Beijing twice, clarifying Beijing's goal of building a world-class harmonious and livable capital, and emphasizing the need to improve the core functions of the capital. In 2015, the central government approved the "Beijing-Tianjin-Hebei Coordinated Development Outline". In 2017, the Central Committee of the Communist Party of China and the State Council formally approved the "Beijing City Master Plan (2016-2035)", further establishing the capital city strategy of the "four centers" of the national political center, cultural center, international exchange center, and scientific and technological innovation center Positioning.
With major development, major changes, and major upgrades, Beijing Power Grid has ushered in a period of important strategic opportunities. Beijing Power Grid is a typical urban receiving-end power grid. About 70% of its power comes from external transmissions. In order to improve the power supply capacity, during the "13th Five-Year Plan" period, Beijing will rely on the State Grid Corporation's UHV plan to build new "East, South, West and North" With 7 external power receiving channels in four directions, the external power receiving capacity of Beijing Power Grid will be doubled on the original basis after all of them are completed.
How to ensure the safe and reliable operation of so many power grid equipment in Beijing, and how to ensure the delivery of green and high-quality electric energy to thousands of households? Accelerating the level of intelligence of Beijing Power Grid is the fundamental way out.
"Smart grid has many advantages such as improving energy efficiency, reducing environmental impact, improving power supply safety and reliability, and reducing power loss. The intelligent construction of Beijing Power Grid started in the 1990s, and it was initially in the field of power transmission and transformation equipment for the power grid. , Developed and applied dispatch automation, power transmission and transformation equipment automation systems; in 2000, Beijing Electric Power began to improve the level of intelligence in the distribution network, and successively applied automation equipment in the distribution network; by 2016, we formulated the construction of intelligent distribution network The three-year development strategy is to accelerate the overall upgrade and transformation of the distribution network; this year, we have built the “one-piece dual-core†distribution automation system with the strongest information processing capability in China. 45,000 distribution automation terminals have been put into operation, which fully supports the distribution network. Grid control operation, production operation and maintenance management, condition maintenance, defect and hidden danger analysis and other business operations are carried out." Liu Runsheng, deputy general manager of State Grid Beijing Electric Power, introduced.
Under Beijing Electric Power’s “integrated dual-core†mode, if a power supply line fails, the system can immediately locate the faulty section, calculate the best solution through a second-level calculation process, handle the fault remotely, and quickly restore the power supply. Compared with the previous manual investigation method, the efficiency has increased by dozens or even hundreds of times.
Since last year, the coverage rate of distribution automation in Beijing's Fourth Ring Road and all districts and counties will be 100%. By the end of 2018, the coverage rate of regional distribution automation in the city will be 100% and the function input rate will be 100%. In other words, once a fault occurs in the Beijing urban distribution network, it can be “self-healed†intelligently. The entire process does not require manual intervention, and is automatically completed by the intelligent system. The average troubleshooting time has also been increased from the previous hour to the minute. By 2020, the power supply in the core area of ​​the capital will be comparable to the world's advanced level, and the reliability rate will reach 99.9999%.
Since this year’s flood season alone, Beijing Electric Power has been actively exploring the integration of smart grid information. The self-developed grid meteorological disaster accurate warning system has successfully predicted 198 extreme weather such as flooding, mountain torrents, thunder and lightning, strong winds, and hail, accumulating 336 substations A list of early warnings has been issued for 896 transmission lines, and the effect of early warning prediction has reached the international leading level.
According to Qiu Jin, director of the Emergency Management Department of the State Grid Beijing Electric Power Safety Supervision and Quality Department, through the analysis of multi-source data such as satellites, radars, and weather stations, advanced technologies for accurate forecasting and early warning can be achieved in the time dimension from 4 hours to 72 hours in advance. The issuance of early warnings can be geographically fine-grained to a 1-kilometer grid. For more than 500 substations and more than 20,000 line poles and towers affiliated to Beijing Power Grid, weather forecasts and disaster warnings "accurate to one pole" can be realized.
Intelligent platform enhances "benefits" serviceBuilding a world-class power grid includes two concepts: one is a strong power grid, and the other is customer experience. In addition to smart grid construction and operation, Beijing Electric Power’s high-standard smart grid demonstration is also embodied in power marketing services.
In recent years, Beijing Electric Power’s newly launched "Internet + Electricity Marketing Service" intelligent interactive platform has marked the comprehensive upgrade of electric power services in Beijing from offline to online, and citizens can apply for electricity purchases, repairs, installations, etc. Log in to the "Handheld Power" APP and other platforms to implement online processing.
It is reported that up to now, State Grid Beijing Electric Power has completed the free replacement of 8.33 million smart energy meters in Beijing. On this basis, in order to comprehensively improve the customer's power purchase service experience, Beijing Electric Power has built an "Internet + electricity purchase" service platform. Residents can easily purchase electricity through various online channels such as "Handheld Power" APP, WeChat, and Alipay without leaving their homes. The complementary payment mode of "physical tolling outlets" and "electronic tolling channels" established by Beijing Electric Power has realized 7 types of payment channels of electric power business halls, bank counters, self-service terminals, online banking, electricity recharge cards, cable TV, and Alipay. . At present, the number of power grid purchase points in Beijing has been expanded to more than 20,000, and the urban area has basically realized the "10-minute billing circle".
“Beijing’s reform measures have reached the level of frontier indicators in the power index evaluation system, and some reform measures even exceeded the frontier indicators.†Not long ago, the World Bank Group’s Global Indicators and Analysis Bureau, which came to China to sample business environment data Acting Director Ms. Rita Ramalho said.
It is understood that the application of Beijing Electric Power Intelligent System has also benefited thousands of small and micro enterprises. Beijing Electric Power has achieved the “three firsts†nationwide, that is, it is the first to integrate the World Bank survey objects with the State Council’s policy to support small and micro enterprises, and is the first to increase the low-voltage connection capacity from 100 kW to 160 kW, and is the first to launch low-voltage access for small and micro enterprises. Electricity "three zeros" service (zero door-to-door, zero approval, and zero investment). As of the end of August, the “Three Zeros†service has been provided to 9598 small and micro enterprises, the number of power connection links has been reduced from 6 to 2, and the average power connection time has been reduced from 141 days to 5.09 days, saving customers a total of 301 million yuan in investment.
Behind providing customers with "no-running" services, it is relying on Beijing Electric Power Internet's high-tech methods and strong back-end data support. "For the service of'Three Zeros', we put forward the concept of'Zero Distance'. Customers'don't run at a time', using telegrams to install, pay and report for repairs, all can be completed on the handheld power APP. In the background, we develop and apply the PMS system , Marketing information system, survey and design integration system, power supply service command platform and other big data processing and analysis methods, fully realize the full online business processing, greatly reducing the customer processing time." State Grid Beijing Electric Power Marketing Department Deputy Director Wei Yanping introduced.
Xia Quan, Secretary of the Party Committee of State Grid Beijing Economic Research Institute, said: “With the construction and commissioning of a number of major Beijing smart grid projects in recent years, the advantages of smart grids have been fully highlighted. At present, it is supported by information and communication platforms and intelligent control. The Beijing Modern Smart Grid, which includes power transmission, transformation, distribution, power consumption, and dispatch, has been initially established. In the future, the smart grid will continue to be explored and developed in a more intelligent direction."
Liu Runsheng told reporters that with the rapid development of new-generation information technologies such as the Internet of Things and cloud technologies, the Beijing Power Grid will accelerate the application of artificial intelligence technology in the areas of device interconnection, state awareness, and information interaction in the future. For power grid companies, more effectively optimizing asset allocation, improving operation and maintenance efficiency, automatically optimizing control, and obtaining a good user experience is a leap from quantitative to qualitative changes in smart grids.
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