Even though it is the beginning of autumn, the temperature in many places remains high. In July, the national average temperature was the second highest in the same period since 1961, with the highest daily temperatures at 245 national meteorological stations breaking through the historical extreme value of July; at the same time, the epidemic prevention and control situation is improving, and the policy of stabilizing growth is implemented, and the pace of enterprises resuming work and achieving production has accelerated.Electricity loadSet new highs again and again.

He Yang, director of the Electric Power Department of the National Energy Administration, introduced that on July 15, the country's highest power load reached 1.26 billion kilowatts, and the power generation on that day reached 28.5 billion kilowatt-hours. During the peak period of loads of "seven down eight up" and "up" the electricity load is expected to continue to rise. Current coalPower supply guaranteeHow is the progress of various work? The reporter conducted an interview.

coal--

Increase smooth connection between production, transportation and demand, and grasp "maintaining quantity" and "stabilizing price"

In Ordos, Inner Mongolia, the comprehensive mining face of the Shendong Coal Bulianta Coal Mine of the State Energy Group is very busy. Tap the start button and the coal miner slowly moved forward. With one knife, 2,300 tons of coal fell into the scraper transport machine and was transported to all parts of the country through washing, selection and processing.

"During the peak electricity consumption period, a coal-carrying train departs from here almost every 10 minutes. In July, our own coal production completed 14.53 million tons, an increase of 410,000 tons year-on-year." Wang Chengcai, director of the Shendong Coal General Dispatch Office, introduced. In the first half of this year, the State Energy Group completed the 58 million tons production capacity increase of 18 coal mines; the coal output was 300 million tons and the railway transportation volume was 230 million tons.

Coal is the "ballast stone" of my country's energy security. Since the beginning of this year, international coal supply and demand have been tight and coal prices have fluctuated at high levels. The cost of imported coal in my country has increased, with 115 million tons of coal imported in the first half of the year, a year-on-year decrease of 17.5%, which puts forward higher requirements for doing a good job in ensuring coal supply and stabilizing prices based on the domestic situation.

Judging from the output, raw coal production has grown rapidly. In the first half of the year, the coal output of large-scale enterprises nationwide was 2.194 billion tons, an increase of 11% year-on-year. Since the beginning of this year, the advanced production capacity of coal mine projects has been approved by 37.7 million tons/year, the adjustment of construction scale has increased the production capacity by 9 million tons/year, and the trial production capacity has been promoted by 60 million tons/year.

Judging from the capacity, the transportation of electricity and coal is stable and orderly. Making good use of the main channels for transporting west coal from east to south coal from north to south, the national railway sent more than 130 million tons of electric coal in July, an increase of 40% year-on-year.

Judging from the price, the price of thermal coal long-term contracts is basically stable and the market price fluctuates at a high level. In July, the medium- and long-term contract price of 5,500 kcal of thermal coal at Qinhuangdao Port was 719 yuan/ton, the same as in May and June, up 71 yuan/ton year-on-year.

Liu Tao, deputy director of the Coal Department of the National Energy Administration, introduced that recently, the National Energy Administration has deployed the supervision of medium- and long-term contract performance of power coal across the country, urging coal enterprises to improve the performance fulfillment rate, strictly implement national policies, and improve the stable supply level of power coal.

Accelerating the construction of coal storage facilities and strengthening the construction of coal reserve capacity is an important measure to balance the volatility of power coal supply and demand and ensure the demand for coal use during peak periods. In June, Shandong's power grid power load set a record five times, with a maximum of 97.576 million kilowatts, and continued to maintain a high level.

"We transported 600,000 tons of resources from Inner Mongolia and Shaanxi for reserves, and market-oriented procurement of 1.1 million tons of thermal coal in Caofeidian Port, Qinhuangdao Port and other places, effectively making up for the province's self-produced resource reserve gap." Xia Jing, general manager of Shandong Energy Group Marketing and Trading Company, introduced that as of July 28, the group's government's government can dispatch coal reserves exceed 5.84 million tons. At the same time, the eight newly planned and constructed coal reserves this year are also being accelerated.

Power generation—

The scale of unplanned coal-fired power outages has dropped to its lowest level in many years, and clean energy power generation has grown rapidly

At the Laizhou Power Plant of China Huadian Group, four million kilowatt coal-fired generator sets are operating stably. "In the first seven months of this year, the cumulative annual power generation exceeded 10.5 billion kilowatt-hours. The power generation on August 2 reached 91.01 million kilowatt-hours, with a load rate of 92.5%, a record high." Cao Shanyong, deputy general manager of Laizhou Power Plant, said. Not only that, the power plant is promoting the heating transformation, energy-saving and carbon reduction transformation, and flexibility transformation of units to further reduce coal consumption for power supply.

At present, coal-fired power is still the main power supply in my country. With less than 50% of the installed capacity, it produces about 60% of the country's electricity, meeting the peak load demand of more than 70%. According to statistics from the China Electric Power Enterprise Federation, as of the end of June, the coal inventory of coal-fired power plants of the power generation group included in the fuel statistics of the power industry was 96.01 million tons, an increase of 42.6% year-on-year, and the available days for coal inventory of electricity were 22.4 days. Currently, the scale of unplanned coal-fired power outages and hindered output has dropped to its lowest level in many years.

A relevant person in charge of the China Electric Power Enterprise Federation also said that since this year, the overall price of coal prices in the power coal market has risen before and then stabilized, and continued to fluctuate at high levels. The unit price of standard coal at large power generation groups has risen by 34.5% year-on-year. More than half of the coal-fired power companies are still in a loss-making state, and some companies are tight in cash flow. "It is recommended to effectively increase the effective supply of power coal, strengthen the medium- and long-term contract mechanism, and improve relevant policies to support coal-fired power enterprises to alleviate their difficulties."

While coal-fired power supports the peak of electricity consumption, clean energy such as hydropower, wind power, and photovoltaics are also "showing their skills". The assembly capacity of the Baihetan Hydropower Station has reached 10 million kilowatts, my country's first single million kilowatt-level onshore wind power base has been officially put into production, and the first tidal-light complementary photovoltaic power station has been connected to the grid for full capacity to generate power... Since this year, many clean energy power generation projects have been completed and put into production.

As of the end of June, the national installed capacity of full-caliber power generation was 2.44 billion kilowatts, of which the installed capacity of non-fossil energy power generation was 1.18 billion kilowatts, accounting for 48.2% of the total installed capacity, an increase of 2.8 percentage points year-on-year, and the effect of green and low-carbon transformation continued to appear. In terms of power generation, in the first half of the year, the power generation of clean energy such as hydropower, nuclear power, wind power and solar power exceeded 1.2 trillion kilowatt-hours, an increase of 12.8% year-on-year.

"From the current growth rate of power investment and the planning situation in various places, the power supply is generally guaranteed. With the continuous production of key power supplies and transmission channels, the tight power supply and demand situation in some areas will gradually improve." A relevant person in charge of the China Electric Power Enterprise Federation said.

Power Grid—

Intelligent inspection ensures safe operation, optimizes scheduling and helps peak cutting and valley filling

To successfully arrive at the user's side from the power plant, the power must pass through an important transmission and distribution network link in the middle. In order to ensure the safety of electricity use, it is necessary to ensure the safe operation of power transmission and distribution equipment and lines, and to optimize grid scheduling through the large power grid, so as to achieve mutual assistance in power surplus and shortage, and peaks and valley filling.

Smart inspection improves operation and maintenance efficiency. Outdoor high temperatures are roasted, at the 500 kV Lion Ocean patrol and maintenance center of the Guangdong Guangzhou Power Supply Bureau of the Southern Power Grid, the operation and maintenance personnel "issued" high-temperature and high-load special patrol orders: the air patrol drone and the ground patrol robot are all dispatched, and through laser ranging, laser ranging, infrared temperature measurement and other inspections, the equipment is extremely difficult to escape the "golden eyes". "After the intelligent joint independent inspection system was 'on-job', the average time for fault detection was shortened from the original 40 hours to 3 hours, achieving a dual improvement in efficiency and safety." Wu Xiaoke, manager of the production technology department of Guangzhou Power Supply Bureau, introduced.

Cross-provincial power transmission helps mutual assistance between surplus and shortage. At 22:30 on August 3, with the 500,000 kilowatts of electricity from Zhejiang being sent to Anhui through the East China Power Grid, Zhejiang and Anhui provinces completed the 37th power replacement mutual assistance this year, which is the peak summer. "Zhejiang's industrial electricity load has a large proportion, and the maximum electricity load often occurs during the day, while Anhui's maximum electricity load often occurs at night. The difference in the maximum load period gives the basis for the mutual assistance between power surplus and shortage." Ye Jiong, deputy director of the Zhejiang Electric Power Development Department of State Grid, introduced. According to the agreement, during the peak summer season this year, power will be sent from Anhui to Zhejiang from 7:00-8:30 and 15:30-17:30, and power will be sent from Zhejiang to Anhui from 19:00-22:30.

Demand response realizes peak cutting and valley filling. In addition to the supply side, through demand side response, and using market-oriented methods to guide power users to actively stagger and avoid peaks, it can also promote the supply and demand balance of power and electricity, and improve the real-time regulation capability and safety level of the power grid.

"The response load we signed is 1,800 kilowatts, and the response time is from 10 am to 10 pm. Even if we only respond to 80% of the load, the daily subsidy is about 7,000 yuan." This year, Deca Kesman Chengdu Auto Parts Company signed an active peak-avoiding load response agreement with the local power supply company, and Chen Zhi, deputy chief of the Enterprise Equipment Department, did some calculations. As of August 2, State Grid Sichuan Power's active peak load avoidance resource library has signed 4,493 users, with a contract response capacity of more than 5 million kilowatts, accounting for about 10% of the province's maximum power load.

Next, how to better ensure the balance between power supply and demand during peak electricity consumption? "The national power supply and demand are generally balanced, while the power supply and demand in some provinces in East China, Central China and Southern regions are tight during peak electricity consumption, and the power supply and demand in North China, Northeast China and Northwest regions are basically balanced." A relevant person in charge of the China Electric Power Enterprise Federation suggested that we continue to coordinate key links such as production, transmission, distribution, and use:

First, increase efficiency and tap potential to ensure reliable power supply. Strengthen the operation management of in-service units, reduce unplanned downtime and obstacles, and ensure stable and full units. Maximize the peak power generation potential of various types of power supplies. Optimize the power supply and backup, peak staggered support, and surplus and shortage adjustment between cross-regional power grids, and make every effort to ensure the balance between power supply and demand during peak periods. The second is to give full play to the role of cross-provincial and cross-regional channels. Increase coordination with local governments and increase cross-provincial and cross-regional electricity transactions. The third is to do a solid job in demand-side management and orderly electricity use. Improve the demand response price compensation mechanism, accelerate the introduction of national demand response policies and price mechanisms, and promote the transformation of orderly electricity use to market-oriented demand response.