Yancheng, Jiangsu, the temperature is approaching 37 degrees Celsius. Chen Xin, wearing a full set of insulated clothes, completed the final line renovation in the high-altitude work bucket, which lasted for 4 hours. Sweat had already soaked through the work clothes. At this moment, the power equipment in Moganshan, Zhejiang is lending the surplus nighttime electricity from the industrial park to the scenic area at a millisecond speed, providing cooling air for tens of thousands of tourists. In the summer of 2026, the national electricity load reached a historic high of 1.553 billion kilowatts, but the overall power supply remained stable. This stability comes from a set of supply guarantee combination punches from "uninterrupted operation" to "flexible interconnection".

Allow residents to continue using air conditioning as usual

Under high temperatures, residents' electricity consumption has surged, posing a dilemma for power grid operation and maintenance: lines need to be repaired, but electricity cannot be stopped. In Dafeng District, Yancheng, Jiangsu, a power line that serves over 700 households needs to be renovated and upgraded. Conventional construction requires power outages, and residents find it difficult to withstand the high temperatures of nearly 37 degrees Celsius.

State Grid Yancheng Dafeng District Power Supply Company has chosen a more complex but effective path - live working. After 4 hours of high-altitude work, the renovation was successfully completed, achieving zero power outages for equipment repair and zero electricity perception for users. Similar scenes are unfolding across the country: Weinan Power Supply Company avoids nearly 6-hour power outages through live work; Deyang Power Supply Company adopts the live working+peak scheme of medium voltage generator cars, providing "zero perception" guarantee for more than 4800 households; Danjiangkou Power Supply Company has completed the main transformer capacity expansion, allowing residents of Junxian Town to enjoy a cool summer.

Millisecond response of flexible interconnection

To cope with extreme high temperatures, there is not only a way to save money, but also the wisdom of borrowing electricity. The Moganshan Scenic Area in Huzhou, Zhejiang Province has seen a surge in summer tourists, with tens of thousands of visitors returning to their hotels in the evening. The fully turned on air conditioning has put enormous pressure on the power grid.

Innovatively borrowing electricity from the industrial park outside the mountain - the night workers in the industrial park leave work and the generated electricity is vacant, which complements the peak electricity consumption in the scenic area. The flexible interconnected power device connecting the two can complete cross regional power transmission in milliseconds. Three sets of such devices have been put into operation locally, which can transfer a load of 15000 kilowatts in milliseconds, equivalent to meeting the electricity demand of 1200 homestays.

Since 2026, the country has added over 40 million kilowatts of supportive regulating power sources, mainly concentrated in key provinces with high summer temperatures and heavy loads. From the sweat of high-altitude live working in Yancheng to the millisecond level power dispatch in Moganshan, the power supply guarantee under this high-temperature test not only shows the progress of technology, but also the persistence of "uninterrupted power is the best service".Editor/Cheng Liting