praise for new china's new journey | guizhou power grid: lighting up thousands of lights in colorful guizhou
2024-10-02
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75 years of ups and downs, 75 years of tremendous changes.
generation after generation of guizhou power grid people have not forgotten their original aspirations and kept their mission in mind, making guizhou power grid grow from scratch, from small to large, from weak to strong, growing in development and rising in innovation, making the power grid stronger and providing better power supply services. high quality and more in-depth application of digital technology.
electricity gradually transformed from tiny gleams into a brilliant ocean, paving the way for guizhou's economic and social development and lighting up thousands of colorful guizhou lights.
staff from the guizhou liupanshui power supply bureau of china southern power grid conducted an inspection and acceptance of the entire 500 kv xinpu line. photo by wang fei
coordinated development of main power grids and urban and rural power grids
powerful power guarantee
in early autumn, in baling town, xingren city, qianxinan prefecture, more than 300 workers were full of energy, with the roar of machines and the sound of steel frame cutting intertwined, accelerating the construction of the 500 kv renyi power transmission and transformation project.
at the same time, in xinzhai village, baini town, yuqing county, zunyi city, more than 300 kilometers away, several electric workers were also replacing the 10-kilovolt yuman line tongmuping public transformer with the new one and replacing the 100-kilovolt-ampere transformer. upgraded to 200 kva, completely solving the seasonal overload problem.
this large and small construction scene is a vivid epitome of the parallel development of main power grids and urban and rural power grids, and is constantly being staged in guizhou today.
however, at the beginning of the founding of new china, guizhou had not yet established a power grid and was in a state of "poor and white". to this end, over the past 75 years, guizhou power grid has accelerated the construction of power infrastructure, making ensuring the safe operation of the power grid and reliable power supply a top priority. it has continued to improve the power grid framework, promoted the coordinated development of main power grids and urban and rural power grids, and accelerated the construction of new comprehensive energy bases. , accelerating the construction of a new power system with new energy as the main body, and providing a strong guarantee for people's better life.
the "party commando team" of china southern power grid guizhou power grid company is installing transformers. photo by chen ju
over the past 75 years, guizhou’s power grid has continued to improve.
in 1958, guizhou's 35 kv power grid was formed; in 1978, the 220 kv power grid was formed; in december 1992, the first 500 kv power transmission and transformation project was completed and put into operation.
since the 18th national congress of the communist party of china, guizhou’s power grid has shown a trend of large-scale development. in 2022, the 220 kv power grid will achieve full county coverage. in 2023, the "three horizontals, two connections and one center" 500 kv target grid will be fully completed.
staff from china southern power grid guizhou power grid company replaced an overloaded transformer. photo by chen ju
over the past 75 years, rural electricity consumption in guizhou has become increasingly better.
rural electricity consumption in guizhou began in 1950. after experiencing “county electrification” in 1986, “township electrification” in 1999, “same power network and same price” for urban and rural residents in 2003, “every village electrification” in 2007, and “every household electrification” in 2009, in 2019, we will reach a new level and realize that all rural electricity consumption indicators on a city-by-city basis in the province will exceed national standards.
in the 75 years of guizhou power grid, the main power grid, as the "artery", has become larger and larger, the voltage level has become higher and higher, more reliable and stronger; the urban and rural power grid, as the "capillary", has extended from the subtleties to the vast world. , deeper and broader. the two work "hand in hand" to help guizhou's high-quality economic and social development.
accompanying the strong power grid is the leapfrog development of guizhou's power generation installed capacity. according to data from the guizhou electric power industry association, as of the end of august 2024, the province's installed power generation capacity reached 88.99 million kilowatts, an increase of more than 29,000 times compared with the beginning of the founding of new china.
digitalization and technology lead innovation and development
productivity of new electricity quality is increasing day by day
in gui'an, in the monitoring room of guizhou power grid's intelligent operation center, when the "one-button takeoff" command is pressed, the drone begins the line inspection task under the remote operation of power grid employees. based on the data returned, ai automatically identifies 21 types of defects through algorithms to ensure the safe and stable operation of the power grid.
this is the normal state of daily inspection and maintenance of the province's 49,000 kilometers and 170,000 base towers after the self-service inspection of drones' "one-click takeoff" for transmission lines in guizhou power grid. compared with traditional manual inspections, the efficiency has increased by 150%.
in tongren, guizhou power grid's first intelligent pilot substation - tongren 220 kv taiping substation, a new generation 5g intelligent robot is equipped with 28 high-precision sensors and 4 sets of high-definition cameras, with infrared temperature measurement, image algorithm recognition and other functions , replacing manual work to complete the integrated operation of "automatic inspection + intelligent analysis + risk level + disposal plan".
"from receiving instructions to completing the work, the intelligent robot only takes 50 minutes." zhou jingyu, deputy squad leader of the substation intelligent operation team of the tongren power supply bureau's substation management office, said that compared with the 12 hours required for manual inspections in the past, it has been significantly reduced.
today, there are 313 smart substations in guizhou, and the "machine replacement" rate of substation inspections has reached more than 50%, effectively solving the operation and maintenance problems of widely distributed and long distance substations.
over the past 75 years, both the operation and maintenance of power lines and substations have experienced profound transformations from manual to informatization, digitization, and now intelligence, becoming a vivid footnote to the development of new power productivity.
in the intelligent work class of guizhou zunyi power supply bureau of china southern power grid, staff check the substation inspection status through the intelligent operation support system (substation). photo by long dingjin
in this process, the power of technology is also demonstrated.
ice coating of transmission lines in winter is the biggest challenge facing guizhou power grid. after the severe ice disaster in 2008, under the leadership of china southern power grid corporation, guizhou power grid was used as a pilot to carry out in-depth research on anti-icing technology, and successively tackled "accurate current controllable dc ice melting technology and series of devices" and "dc ice melting device equivalent test" technologies such as "accurate monitoring of ice covering on transmission lines in mountainous areas" have successfully solved the world problem of ice covering on transmission lines.
now, when the winter rain, snow and freezing weather comes again, guizhou power grid people have taken it easy.
effectively preventing fire hazards in miao and dong villages is another challenge faced by guizhou power grid people.
therefore, the "power fingerprint" technology came into being.
in hotels, private houses and shops in qianhu miao village in xijiang, leishan county, qiandongnan prefecture, 363 sets of sockets with "power fingerprint" technology have been installed and trialled.
different from ordinary sockets, it can identify the type, parameters, status and other characteristics of the equipment through the current, phase, harmonic and other clues left by the operating equipment in the power grid, and can promptly detect and control dangerous electrical equipment and users before a fire occurs. electrical behavior and electrical events can identify equipment types and hidden dangers in one second, equipment parameters in one hour, and users' electricity usage habits in one week, thereby realizing active firefighting and prior prevention of electrical fires.
heting photovoltaic power station in wangmo county, qianxinan prefecture. photo by lu guanwen
adhere to promoting green development
the shape of the new power system is beginning to take shape
by the end of may this year, the province's new energy installed capacity exceeded 20 million kilowatts, accounting for 30.4% of the province's regulated installed capacity, surpassing hydropower to become the second largest power source in guizhou's power grid.
starting from the commissioning of the first wind turbine in 2011, it took 13 years for guizhou's power supply structure to realize the transformation from the traditional "water and fire mutual aid" to "water, fire, wind and solar energy storage" multi-energy complementation.
accompanying this is the vigorous construction of guizhou power grid connection channels. relying on the "three horizontal, two connected and one center" 500 kv grid, it has opened up a large channel for the transmission of wind and solar clean energy in western guizhou, meeting the needs of large-scale new energy access and transmission in western guizhou, effectively assisting the grid-connected power generation of new energy, and effectively ensuring the utilization rate of new energy power generation in our province has exceeded 99% for many consecutive years.
by the end of 2024, guizhou power grid will have built a 30 million kilowatt new energy transmission channel in the west, added more than 4 million kilowatts of new energy installed capacity, and 3 million kilowatts of new energy storage to meet the local consumption of clean energy.
facing the rapid development of new energy, guizhou power grid actively responds to new challenges.
power dispatch is more precise and controllable. in view of the intermittent and volatile characteristics of new energy power generation, guizhou power grid has built a comprehensive application platform integrating observable, observable and controllable new energy. the accuracy of short-term forecasting of wind power and photovoltaic has been increased to more than 75% and 85%, providing a basis for refined dispatch of new energy. the operation provides strong support. at the same time, using qianxinan prefecture as a pilot project, a provincial-level “water, fire, scenery, and solar” agc (automatic power generation control) collaborative control system was built to achieve considerable controllable and orderly power generation for all new energy stations connected to the grid.
there is a demonstration for developing rural distributed photovoltaics. in namu village, yangchang township, liupanshui city, china southern power grid’s near-zero carbon demonstration zone, guizhou power grid has fully built a distributed smart grid, deeply integrating new energy, energy storage, charging piles and other energy forms to promote efficient utilization of rural energy and clean development has helped namucun increase its photovoltaic consumption capacity by more than 30%, meeting the needs of large-scale distributed new energy access and the electrification of rural production and life. at present, relevant technologies have been promoted and applied in panzhou, ziyun, wangmo, liuzhi, meitan, pingtang and other places.
the development of "microgrid" has taken steps. the first integrated photovoltaic storage and charging demonstration charging station in guizhou province was built in jushan street, xingyi city. it can be operated in parallel with the external power grid or in isolation. it has a total of 22 charging guns and 630 kva of energy storage photovoltaic power generation. it can be fully charged in an hour and can charge 10 to 12 cars, and the remaining power can be used to access the internet.
author zhang qi wu youkang long dingjin
editor jia peng
second instance wang hao
third trial wang yaling
