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Green Energy Channel has been put into operation for 25 years

Green Energy Channel has been put into operation for 25 years

  • Categories:Industrial Trend
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  • Time of issue:2018-09-15 08:10
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Green Energy Channel has been put into operation for 25 years

(Summary description)On May 7, 1993, the 500kV Luodong Substation of the Guangdong Foshan Power Supply Bureau of China Southern Power Grid was officially put into operation as the grid-connecting gate was pulled down. Yunnan Power Grid began to transmit electricity to Guangdong through a 220kV Lu antenna line. The prelude to the “West-to-East Power Transmission” is a solution to the “urgency” of Guangdong’s development. In the past 25 years, hydropower from Yunnan, Guizhou, Guangxi and other places rushed across thousands of kilometers of the sky, continuously releasing kinetic energy to provide for the economic development of Guangdong Province Strong support.

  • Categories:Industrial Trend
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  • Time of issue:2018-09-15 08:10
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Leaping three thousand miles across the air, high-pressure tuned tens of thousands of power. There is electricity from the west to the east, and it has made contributions for 25 years.

On May 7, 1993, the 500kV Luodong Substation of the Guangdong Foshan Power Supply Bureau of China Southern Power Grid was officially put into operation as the grid-connecting gate was pulled down. Yunnan Power Grid began to transmit power to Guangdong through a 220kV Lu antenna line. The prelude of "power transmission from west to east" is a solution to the "urgency" of Guangdong's development. Over the past 25 years, hydropower in Yunnan, Guizhou, Guangxi and other places has rushed across thousands of kilometers of the sky. The continuous release of kinetic energy has provided strong support for the economic development of Guangdong Province.

Exterior view of 500 kV Luodong Station (Photo by Chen Zehuai, Foshan Power Supply Bureau)

Coordinated development: rewrite the history of power shortage

Statistics show that, as the frontier of reform and opening up, Guangdong accounts for about 60% of GDP in the five southern provinces and regions, and the proportion of electricity consumption has reached 60%. However, the proportion of primary energy and the self-sufficiency rate are very low. In 2000, 21 cities in Guangdong ran out of electricity due to power shortages, with a loss of 20 billion yuan a year. In the 1980s and 1990s, the power shortage situation was even more severe. In the memory of Cheng Zhihai, the person in charge of a substation management office of Foshan Power Supply Bureau, a participant in the construction of Luodong substation and the former station chief, power outages were normal, which did not match the rapid economic development of the province at that time and the changing outlook of the city.

On the contrary, the west is on the contrary. Due to the influence of geographical environment and climatic factors, there are abundant water resources in Yunnan, Guizhou, Guangxi and other provinces. However, due to the relatively underdeveloped economy and low development level, it is difficult to transform into clean and green hydropower. Lost in vain.

The unbalanced distribution of resources sets a barrier for the development of the East and the West, but also provides room for development for win-win cooperation between the East and the West. On May 7, 1993, Luodong Substation, the first 500 kV substation in Foshan, was officially put into operation. This is the first batch of 500 kV large open substations in Guangdong Province. It is the main road connecting Guangdong Power Grid to the power grids of the three southwestern provinces. After the start of the power transmission project, it will enter the first gateway hub substation in Guangdong. On the same day, a 220kV Lu antenna line of Yunnan Power Grid (Yunnan Lubuge Power Plant to Guizhou Tianshengqiao Secondary Power Plant) was officially connected to the Guangdong Power Grid and began to transmit power to Guangdong. In the future, hydropower from Guangxi, Guizhou and other places will also use this as an important station for western power to enter Guangdong.

"That day, I personally handed off the grid-connected gate, and the electricity from Yunnan was finally'sent' to Guangdong all the way." Recalling this event many years later, Cheng Zhihai still couldn't hide his excitement. In his eyes, he could see the moat spanning thousands of kilometers with gurgling springs, nourishing the vast land of Guangdong that was thirsty due to lack of electricity.

One bridge flies from north to south, and the moat becomes a thoroughfare. As far as the east and west regions are traversed by mountains and ridges, the Luodong substation is undoubtedly the bridge that transforms the moat into a thoroughfare, and the east and the west work together to speed up development. In 2017, Luodong station received 17.9 billion kilowatt-hours of power from west to west, more than one-tenth of the total power from west to east in Guangdong. As of July 2018, the cumulative electricity sent from west to east to the 500 kV Luodong substation has exceeded 264 billion kWh, of which 70% is clean energy such as hydropower. Over the years, the West-to-East Power Transmission Project has solved one-third of Guangdong's power demand, rewriting the history of power shortages due to power shortages, and Guangdong's development has accelerated.

Evening view of the main transformer site of Luodong Station (Photo by Chen Zehuai, Foshan Power Supply Bureau)

Overcome difficulties: solve technical problems from scratch Luodong substation is the cradle of growth

Everything is difficult at the beginning. As the one with the earliest start, the longest distance, and the largest capacity among the three channels of the West-East Power Transmission Project, how can the southern line realize long-distance, large-capacity, and low-loss safe power transmission? How to pass the test of extreme weather and natural disasters? All these pose challenges to the Luodong substation. At this time, a group of power workers with ingenuity and courage to overcome difficulties stood up from the Foshan Power Supply Bureau.

"When the Luodong substation was built, there was no domestic experience of the same scale to learn from, and the main equipment was basically imported." Cheng Zhihai introduced that the equipment at the time came from France, Italy, Switzerland, Japan, South Korea, Belgium and other countries. There is no precedent for installation and commissioning, and its lengthy and professional foreign language manuals are rarely understood by anyone.

In order to gnaw off the "hard bones", Cheng Zhihai and his colleagues lived in temporary shack built on the construction site, and only went home once a week. They focused all their energy on technical learning and translated the manuals with the help of professional books and dictionaries. In some places, it took more than 3 hours to get to the door with the bumpy car and ask the experts in the bureau to explain. At the same time, Cheng Zhihai and his colleagues made full use of the internationally accepted "language" of equipment drawings, digested the "instructions" little by little against the drawings, discussed and solved every small problem.

Painstaking people, the sky will live up to it. Even though they were crossing the river by feeling the stones, Cheng Zhihai and others relied on super perseverance and learning ability to complete the Luodong substation and put it into operation 20 days ahead of schedule. The experience in the construction of Luodong substation has even been compiled into 500 kV substation construction standards and regulations, which have become a reference for subsequent substation construction. Many of the electric workers who worked hard for the Luodong Substation in the past have also become the stationmasters of the Foshan 500kV substation, and the Luodong Substation has become the cradle of outputting substation talents.

Not only that, the Luodong Substation also shoulders the heavy responsibility of the Southern Power Grid and the Guangdong Anwen Main Station, and is connected to 7 220kV substations respectively, and is responsible for the power supply of parts of Chancheng District, Nanhai District, and Sanshui District. The operational safety of the most core site of Foshan Power Grid is directly related to the safety and stability of Guangdong Power Grid and even the entire Southern Power Grid. For this reason, since its completion, Luodong Substation has continued to carry out comprehensive automation transformation according to the needs of the situation, and the original pure imported equipment has been continuously updated to domestically produced equipment. Guo Xiujie, the director of Luodong Substation, introduced that the Luodong Substation has introduced Internet+, robot inspection and other systems long ago, which greatly improves the safety and reliability of power.

Transformation and upgrading: integrated energy services have become a trend, helping green development with unshirkable responsibility

Those who observe the situation will know, the trend will be wise, and those who control the situation will stand alone in the world.

In the 25 years since Luodong Substation was put into operation, the west-to-east power transmission channel has gradually been completed, and the power grid has become stronger. Advantages are transformed into economic advantages. However, with the economic and social development of the western region, the energy demand of the western provinces will continue to increase. To avoid falling into a passive situation, the eastern provinces must transform their development methods, improve resource utilization efficiency, and promote the application of new clean energy.

Foshan Power Supply Bureau built 100 charging piles at the passenger station in Gaoming District in 2017 (Photo by Chen Zehuai, Foshan Power Supply Bureau)

After realizing this, in 2016, China Southern Power Grid proposed to be an integrated energy service provider. While receiving energy from Xidian, the Foshan Power Supply Bureau also accelerated its transformation to an integrated energy service provider and more actively integrated into the city's green development.

Sun Gongwei, head of the integrated energy division of the Marketing Department of Foshan Power Supply Bureau, said that power supply companies used to build power grids and sell power, but now they are committed to relying on the technological advantages of power grids to provide better energy services to enterprises and citizens, "such as layout For the charging pile business, due to the country’s strong support for new energy vehicles, the growth rate of new energy vehicles is extremely fast.” According to him, Foshan currently has 2,000 pure electric buses and 500 hybrid buses. Next year, Foshan will realize 100% electrification of buses, coupled with the increasing electrification of taxis and private cars, the demand for charging piles will steadily increase.

"According to the data of the China Southern Power Grid's'Yueyi Charging' APP, the associated charging piles of the Foshan Power Supply Bureau are charged 800-900 times a day, and the charging power reached 2.2 million watts this year." Sun Gongwei said that in 2018, the Foshan Power Supply Bureau will achieve photovoltaic project capacity 3.2 megawatts, 580 new charging facilities will be built; 1.425 billion kilowatt-hours will be replaced by electricity; it is expected that by 2020, 1,700 charging facilities will be built independently.

In addition, the Foshan Power Supply Bureau continues to promote cold storage projects, which is also a typical application of power demand side management for peak shifting and valley filling. Among them, in the Foshan Electric Power Technology Industrial Park, the use of ice storage technology to implement accurate measurement of cold capacity, automatic monitoring and intelligent management of energy utilization, and saving about 20-50% of installed capacity and power of refrigeration hosts. Sun Gongwei pointed out that the implementation of energy-saving design when the building is newly built, compared with the implementation of energy-saving renovation after the completion of the construction, the investment and operation and maintenance costs during the life of the building will be reduced by 1.5 to 3 times.

From power grid construction to energy transformation, to energy saving and consumption reduction, the green power grid woven by Foshan Power Supply Bureau is taking shape, which will paint a more beautiful, greener, and more environmentally beautiful Foshan. (Contributed by Zhao Yan and Liu Chunyang from Foshan Power Supply Bureau)

This article is transferred from People's Daily Online

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