China Southern Power Grid's West-East Power Transmission exceeded 200 billion kWh for the first time!

At 12 o'clock on the December 26th, China Southern Power Grid's annual transmission of electricity from the east to the west reached 2001.85 billion degrees, breaking through 200 billion degrees for the first time, and hitting a record high for the seventh consecutive year. This figure is nearly three times higher than the beginning of the establishment of China Southern Power Grid. As of the end of November, the electric power delivered by Yunnan's West Electric Power reached 117.29 billion kWh this year, a year-on-year increase of 13.8%, and the annual increase in Yunnan hydropower exceeded 26 billion kWh, exceeding the national target for the elimination of hydropower. The share of clean energy in China Southern Power Grid has already exceeded half, far higher than the national average. Among the electricity delivered to Yunnan, clean energy accounted for 97% of the total.

Li Qingkui, party secretary and chairman of the China Southern Power Grid Corp., said: "Yunnan is an important source of electricity for the transmission of electricity from the west to the east. China Southern Power Grid Co., Ltd. vigorously promotes the sustainable development of West-to-East power transmission. By the end of 2020, it will build eight exchanges and eleven DCs. 19 The west-to-east power transmission channel will achieve a maximum transmission capacity of over 50 million kilowatts, and will promote the optimal allocation of resources in the eastern and western regions to make the sky bluer, the water more clear, and the mountains greener. It will contribute South China Power to build 'beautiful China'."

This year, Yunnan has seen an abundance of 10%

Can generate about 12 billion kWh

In recent years, the consumption of hydropower in Yunnan has always been the focus of attention of all parties. The National Development and Reform Commission and the Energy Bureau successively issued the "2017 Key Hydropower and Water-saving Provinces and Districts Work Program", "Notice on Accelerating Hydropower Consumption in Southwest China" and "Implementation Plan for Resolving Abandoned Wind, Abandonment, and Wind Discontinuation Problems" and other documents in this year. Hydropower consumption target: In 2017, on the basis of 96.5 billion kWh of electricity for priority power generation across provinces and regions, the market power output in Yunnan will be no less than 20 billion kWh, and the annual hydropower utilization rate will strive to reach 90%; by 2020 Effectively solve the problem of abandonment of abandoned water and abandoned light.

“The large-scale centralized production and commissioning of hydropower in Yunnan and the increase in load in the province are far lower than the planning expectations, and it is the main reason for the difficulty in absorbing hydropower in Yunnan,” said Wang Zhiyong, deputy director of the plan development department of China Southern Power Grid Corporation. It is understood that during the 12th Five-Year Plan period, Yunnan Province added 43 million kilowatts of new installed capacity, of which hydropower accounted for 34 million kilowatts, maintaining an average annual growth rate of 17%, while its electricity load growth was only 7%.

Compared with previous years, the situation this year has become more severe. The actual inflow of water in the major river basins in Yunnan Province was significantly better than expected at the beginning of the year, and the overall arrival of water was about 10% higher than expected, and the arrival of water was mainly concentrated in the main flood season from July to September, Jinsha River, Hongshui River, In the flood seasons of major river basins such as the Minjiang River, the average annual rainfall was more than 30% higher than last year.

"If we use this large percentage of the incoming water to generate electricity, we can generate 12 billion kWh, which is equivalent to reducing 3.75 million tons of standard coal consumption and reducing 9.62 million tons of carbon dioxide emissions. This is a total of 6.88 million family of three. Electricity, said Wang Zhiyong.

The high proportion of installed hydropower in Yunnan also objectively determines that some hydropower cannot be used effectively. It is understood that currently, Yunnan's hydropower accounts for 73% of its installed capacity. About 21 million kilowatts of small and medium-sized hydropower have only weekly-adjusted capacity or non-adjustable radial run-off hydropower, and its self-regulatory capacity is relatively poor.

20 initiatives "soft and hard"

Fully absorb Yunnan Fuyu Hydropower

To promote the recovery of Yunnan Fuyu hydropower, Cao Zhian, general manager of China Southern Power Grid Corporation, told reporters: “The China Southern Power Grid Company has conscientiously practiced the concept of green development, brought into full play the role of a platform for optimal allocation of energy resources, advanced planning, doing everything possible, fully deployed, and research and development. The 20 measures have maximally promoted the consumption of clean hydropower in Yunnan. This year, the electricity supply for the marketization of the Yunnan Protocol has exceeded 26 billion kWh, which is more than 6 billion metric tons higher than the state's required consumption targets.”

Mechanism innovation is an important measure to promote the consumption of hydropower in Yunnan. "On the basis of the strict implementation of the intergovernmental framework agreement, we have actively innovated the trading mechanism and promoted the market to play a decisive role in the allocation of resources," Zhang Qirong, chairman of the Guangzhou Power Trading Center, told the reporter.

In the market transaction mode, China Southern Power Grid Corporation has established a cross-provincial and inter-provincial cross-regional transaction model that focuses on perfecting medium and long-term framework agreements and supplementing temporary transactions, and introduces clean energy priority trading and hydrothermal power in the trading rules. Replacement, long-term reserve compensation for thermal power and other market-based mechanisms to ensure that priority is given to the acceptance of clean energy.

In addition to conventional power trading, China Southern Power Grid implemented breakthrough water and electricity replacements in Yunnan and Guizhou. Since the beginning of this year, China Southern Power Grid Company has reported and communicated to the National Development and Reform Commission, the Energy Bureau, the governments of Guangdong, Yunnan, and Guizhou provinces on several occasions regarding the exchange of Yungui water and fire, and formulated the “Yingui Shuihui Exchange Trading Program”, which eventually prompted the governments of Yunnan, Guizhou and Guangdong to The exchange of Yungui Shuihu reached an agreement. On September 12th, China Southern Power Grid organized the first-ever exchange trading of Yungui water and electricity, replacing the original 620 million kWh electricity delivered from Guizhou to Yunnan, hydropower, and fully utilizing the electricity and energy reduction space sent by Guangdong Province to send more energy to Yunnan Fuyu Hydropower Station. .

"Next year we will further enrich the trading varieties, increase trading methods, expand the scope of the transaction, and continue to actively promote clean energy consumption." Zhang Qirong said.

Accelerate the construction of new channels and effectively use existing channels to lay a physical foundation for the recovery of surplus hydropower in Yunnan.

“The construction of key projects of West-East Power Transmission has greatly enhanced Yunnan's ability to deliver hydropower,” said the person in charge of the infrastructure department of China Southern Power Grid Corporation. At present, China Southern Power Grid has formed eight exchanges, ten DCs, and 18 West-East power transmission channels with 500 kilovolts and above. This year Yunnan's transmission power has reached record highs, with the highest power reaching 26.2 million kilowatts, and the daily power output reaching 579 million yuan. degree.

It is understood that another important channel for the delivery of cloud-electricity—the transmission of Guangdong UHVDC power transmission project from northwest Yunnan is also about to be put into operation. After the peak construction of the project is completed in summer before 2018, according to the schedule of supporting power supply at the delivery end, the maximum capacity of the cloud power transmission channel can be increased by 5 million kilowatts. The annual maximum clean energy transmission to Guangdong is approximately 20 billion kilowatt-hours, equivalent to Shenzhen. One-fourth of the electricity used throughout the year. In addition, China Southern Power Grid Corporation is also making every effort to promote the construction of new channels such as the power transmission project in Guangdong and Guangxi in Wudongde Power Station.

Extending the power transmission time allows the channel to be used more efficiently. “Normally, West Power sends Guangdong about 18 hours a day. In order to better absorb Yunnan hydropower, we extend the time to send electricity to Guangdong. Guangdong is hot in July and September, and we sometimes extend it to 20-21 hours. It means that Xidun Electric Co., Ltd., Guangdong Channel, operates at the limit of pressure for almost the entire day,” said Tang Zhuojun, deputy director of the system department of China Southern Power Grid Corporation.

Since the beginning of this year, the number of hours that Yunnan's power grids have sent to Guangdong has reached 5132 hours, an increase of 596 hours year-on-year. In particular, since Yunnan Province, the average daily utilization hours of Yunnan Province from July to September reached 20.6, 21.8, and 21.1 hours respectively.

Guangdong Chengyun Electric's largest "buyers"

30% of electricity is from West Power

"Yunnan delivered 117.29 billion kWh of electricity, more than the Three Gorges one year's electricity generation, which exceeds the electricity sold in Yunnan Province," said Wang Zhiyong, deputy director of China Southern Power Grid's planning department.

For Yunnan, since the country implemented the strategy of sending electricity from the west to the east, Yunnan has built a high-quality energy base based on hydropower, and electricity has become the pillar industry of Yunnan's economy. In 2017, Yunnan alone can increase its economic value-added value by more than 4 billion yuan by selling surplus hydropower.

“The marketization of China Southern Power Grid in Yunnan Province has also made significant progress. Yunnan has liberalized all large industrial users and participated in market competition with full power. The users and power generation companies that entered the market have all canceled the base power and catalog price, but the market The formation of a mechanism, said Liu Min, deputy director of the marketing department of China Southern Power Grid Corporation. In January-November, Yunnan Province had a market-wide electricity trading volume of 63.25 billion kWh, an increase of 19.4% year-on-year. The average price reduction of electric power plants was 101.28 yuan/kilowatt-hour, which is equivalent to reducing the total cost of Yunnan's electricity consumption by 6.41 billion yuan. The operating rate of major electricity-consuming industries in Yunnan Province rose from the lowest of 42% at the beginning of the year to the highest of 66.8% in early October, the highest level in the past three years.

Guangdong, on the other hand, has become the largest "buyer" of cloud power. Guangdong Province has been ranked first in the nation in purchasing electricity for many years. This year it is 563.9 billion kWh, of which 139.8 billion kWh is from western hydropower, 108.8 billion kWh from the province, and 315.3 billion kWh. For Guangdong, which is dominated by thermal power generation, there is only one clean energy source in every two degrees of electricity. “The western hydropower transmission to Guangdong is equivalent to reducing the same amount of coal consumption pollution in Guangdong. Xidian has increased the proportion of clean energy in Guangdong by 24.8%,” said Liu Wentao, director of the Guangdong Electric Power Dispatch and Control Center of China Southern Power Grid.

In terms of economy, the price advantage of Yunnan hydropower has reduced the cost of electricity for the entire society in Guangdong. Relying on the Guangzhou Power Exchange Center platform, Yunnan and Guangdong provinces have participated in various transactions including bilateral consultations, monthly incremental listings, power generation contract transfer, etc., reducing the total cost of electricity use in Guangdong Province by approximately RMB 2.6 billion, which is conducive to the promotion of entities. economic development.

In terms of ecology, Yunnan's clean energy has been “green” to Guangdong through the optimization of resource allocation from the Western Power Grid to the West. Yunnan's 117.29 billion kWh of electricity was sent to Guangdong and Guangxi, equivalent to a reduction in the consumption of standard coal by approximately 31.27 million tons and a reduction in carbon dioxide emission by approximately 82.44 million tons. The saved coal is equivalent to a year's output of 10 ultra-large coal mines.

From the data analysis, it can also be seen that as the proportion and increment of West-to-East power transmission continue to expand, the more clean power transmission, the greater the proportion of air quality days in Guangdong. In the past ten years, the total amount of electricity delivered by the company to the Guangdong Province reached 1.2 trillion kWh, which corresponds to a 61% drop in the number of haze days in Guangdong. As a major province of the economy, Guangdong accounted for 92.7% of the days of good air last year, of which Yunnan hydropower played an important role.

In an interview with the reporter, Zhang Boting, deputy secretary-general of the China Association of Hydroelectric Engineering, also stated that the impact of hydropower transmission from Yunnan on the environment is of great significance. This not only represents the significant work done by the China Southern Power Grid Company in the consumption of hydropower in the southwest, including the channel Construction, inter-provincial power market development, etc., for the country, also made a very important pave for the realization of the "Paris Agreement" of China's commitment.

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