State Grid: Electricity load of 10 provincial power grids hits new highs

China Energy Storage Network : Recently, affected by the continuous high temperature weather across the country, the power load of 10 provincial power grids in the State Grid operating area, including Tianjin, Hebei Southern Power Grid, Shandong, Jiangsu, Zhejiang, Anhui, Fujian, Liaoning, Eastern Inner Mongolia, and Xinjiang, has reached a historical high. The company has thoroughly studied and implemented Xi Jinping Thought on Socialism with Chinese Characteristics for a New Era, conscientiously implemented the decisions and arrangements of the Party Central Committee and the State Council, and the majority of cadres and employees have worked hard and continuously to fight against high temperatures and scorching heat to ensure power supply, and fully cope with the test of peak loads and extreme weather. With strong measures, it has ensured the safe and stable operation of the large power grid and the reliable supply of power to meet the peak summer, and guaranteed the electricity for people's livelihood.

Challenge: High temperatures and scorching heat, power grid load hits new high

On July 22 and 23, the national power generation hit two new historical highs, reaching a maximum of 22.954 billion kWh, an increase of 376 million kWh and 1.67% over the highest value in summer last year. On July 22, the power load of the North China Power Grid reached 233.4 million kilowatts, a year-on-year increase of 1.5%, a new historical high. On the same day, the power load of the four provincial power grids, including Shandong, Anhui, Liaoning and Eastern Inner Mongolia, all exceeded the historical peak of last year.

At 9:55 on July 23, the peak load of Jiangsu Power Grid reached 100.06 million kilowatts, the first time this year that the load exceeded 100 million. At 12:19, it reached 103.02 million kilowatts; at 13:15, it reached 105.10 million kilowatts... After exceeding 100 million, the load of Jiangsu Power Grid continued to rise. On July 24, the power load of Hebei Southern Power Grid and Zhejiang Power Grid, and on July 25, the power load of Tianjin Power Grid reached new records. At the same time, power grids in Shanxi, Shanghai and other places also hit historical extremes.

At 8 am on July 23, the outdoor temperature in Baoding, Hebei Province reached 31°C, and the surface temperature was close to 60°C. As "hot" as the weather was, the planned technical transformation work being carried out by the second substation maintenance team of the Yixian Operation and Inspection Branch of the State Grid Baoding Power Supply Company was also underway. Under high temperatures, the substation maintenance site is like a big steamer. Even if you stand still, sweat will continue to flow down, leaving large sweat stains on the blue insulating suits of the maintenance personnel. Lu Renliang, the team leader of the second substation maintenance team, and his "comrades-in-arms" started their day's work in such an environment.

On that day, thousands of miles away in Shanghai, the highest temperature broke through 36℃, sounding the first yellow high temperature warning this year. The staff of the power distribution repair team of State Grid Shanghai Pudong Power Supply Company fought against the scorching sun and the high temperature. When one staff member successfully completed the repair task on Chuansha Road and was tidying up the ground wire on the ground, another power supply employee continued to conduct cable testing in the heat wave.

In recent days, the traffic volume of 95598 has reached the highest peak since the peak summer this year. The number of incoming calls to the State Grid Customer Service Center 95598 was 470,000, and the number of manual requests was 310,000. Faced with the severe test brought by the hot summer weather to the operation of the power grid and power supply services, the center actively promoted the "Online State Grid" and established a three-level standby mechanism to do its best to provide customer service during the period and ensure the smooth flow of 95598 traffic.

Since July, scenes like this have been staged non-stop across the country. For State Grid Corporation of China, the peak summer season is an important period when the power grid, equipment and personnel are tested, and it is a tough battle that must be won. The company will do its utmost to organize the peak summer season work, ensure the safe operation of the main grid, implement power supply measures for important customers, and effectively play the role of the "three lines of defense", so as to fully guarantee the safe and stable operation of the power grid, realize the stable and orderly supply of electricity, strengthen equipment operation and maintenance management and high-quality power supply services, and do its best to prevent floods and respond to emergencies.

This "battle" is inseparable from the company's careful deployment, meticulous arrangements and overall promotion, the work organization and resource allocation of various units of the company, and the personal actions of thousands of "soldiers" at the grassroots level. Frontline employees sweated profusely and fought under the scorching sun to ensure the safe and stable operation of the power grid.

Comprehensive measures: ensuring that people have no worries about electricity

82.06 million kilowatts in 2014, 84.8 million kilowatts in 2015, 92.78 million kilowatts in 2016, 102.19 million kilowatts in 2017, 102.88 million kilowatts in 2018... Over the past decade, the highest dispatched power load of the Jiangsu power grid has repeatedly broken records. In the summer of 2017, Jiangsu's dispatched power load exceeded 100 million kilowatts for the first time, and it has now become a large power consumer of 100 million kilowatts for three consecutive years. The same thing is that the power load trend has been rising every year, but the difference is the changes in the development of the power grid.

This summer, the external power supply in Jiangsu may be insufficient, and the power supply capacity is tight. Faced with the high load pressure and severe power supply and demand situation, in addition to ensuring the stable and full power generation of units in the province during the summer peak period and actively seeking resources from outside the region, State Grid Jiangsu Electric Power also actively promotes users to use electricity in an orderly manner. At present, Jiangsu's orderly power consumption plan involves 35,000 users such as enterprises, and can adjust the power load of 14 million kilowatts. Once a power shortage occurs, orderly power consumption will be implemented strictly in accordance with the priority table to ensure that residential users have no worries about power consumption.

From a broader perspective, this summer, the power supply and demand situation in the company's operating area is tighter than in the previous two years, and the structural contradiction between supply and demand is more prominent. The continuous "sauna days" have caused a sharp increase in electricity demand, the continued high electricity load, and the pessimistic power supply and demand situation. Under the dual pressure, the company will carry out supply and demand situation analysis and forecasting in advance on the basis of giving full play to the role of grid regulation and maximizing power supply, actively cooperate with the government to scientifically formulate orderly power consumption plans, improve the startup mechanism and process, and ensure that the load control volume included in the plan must be greater than the possible maximum power balance gap.

Different from orderly electricity consumption under the leadership of the government, power demand response is a more market-oriented means of peak-shaving and valley-filling, which allows users to respond to market price signals or incentive mechanisms, and actively change the market participation behavior of the original power consumption model, so as to achieve coordinated optimization of resources on the power generation side and the demand side, and ensure the normal power consumption of residents and important customers during the peak summer period. Since the release of the "Electricity Demand Side Management Measures (Revised Edition)" last year, Tianjin has implemented "valley-filling" demand response, Henan has implemented "peak-shaving" demand response, Jiangsu and Shanghai have implemented "peak-shaving" and "valley-filling" demand response in batches, and Shandong has issued relevant documents to launch a demand response pilot.

State Grid Zhejiang Electric Power has piloted valley-filling demand response and real-time demand response based on automatic control technology, and the scale of demand response load has been expanded to 3 million kilowatts. State Grid Hebei Electric Power will implement load monitoring and real-time control based on the demand response management platform, and finely and flexibly regulate key users and loads. State Grid Shanghai Electric Power will carry out precise peak-cutting demand response in local areas according to actual conditions, ensure the safe and stable operation of the Shanghai power grid, and meet the electricity demand of the whole society to the greatest extent possible.

Ubiquitous power Internet of Things provides strong support

Shanghai, the engine of China's economic take-off, is also a super-large electricity consumer. Corresponding to the high-load pressure, Shanghai, which is running on the fast track of digital development, is using the ubiquitous power Internet of Things as a powerful "accelerator" to transform the power grid management model and provide strong support for safe and reliable electricity use in summer.

State Grid Shanghai Electric Power took the lead in carrying out the comprehensive response of virtual power plants under the ubiquitous power Internet of Things scenario. 806 users reduced the regional load by an average of 15.06% through the reasonable allocation of their own energy.