According to the National Electricity System and Market Operation Company Limited (NSMO), due to the impact of the widespread heat wave in the North during the period of August 1-4, 2025, the load in the North increased very high, even during the weekend, the maximum capacity of the Northern power system reached 25,761 MW - 4,000-5,000 MW higher (an increase of about 25%) compared to previous normal holidays, this difference is equivalent to 2 times the total capacity of Son La Hydropower Plant.
At 1:30 p.m. - 2:30 p.m. on August 4, the national power system reached 54,500 MW, an increase of 5,000 MW, equivalent to 10% over the same period in 2024 and the highest level recorded since the beginning of 2025 and setting a new record.
Of which, the Northern region alone reached 28,500 MW, an increase of about 3,000 MW, which is also the highest increase since the beginning of the year and 12% higher than the same period last year. Along with that, a series of 220kV and 500kV power lines and transformer stations such as Son La - Viet Tri, Ha Dong - Thanh Cong, Tay Ha Noi, Pho Noi, Hiep Hoa... all recorded high load, even overload, with the potential risk of widespread incidents.
At 1:46 p.m. on August 4, an incident occurred on the 220kV Hoa Binh - Ha Dong line, leading to overloading of the 500/220kV lines and transformers in the surrounding area. NSMO had to adjust the load in some areas to reduce the load on the overloaded lines and transformers to ensure safe operation of the system and avoid widespread incidents. By 3:00 p.m. on the same day, all loads had been restored.
Faced with this situation, NSMO had to mobilize all available power sources, change wiring, adjust power and voltage flows, and closely coordinate with dispatch, transmission and generation units to ensure safe operation. However, the efforts of the electricity industry cannot replace the proactive role of people and businesses. In the harsh hot weather, awareness of saving electricity is the key to protecting the safety of the system and minimizing the risk of overload.
All people take action, each energy-saving device is a shield to protect the NSMO system. People use electricity economically and effectively, especially during peak hours from 13:00 to 15:00 and 20:00 to 23:00; prioritize devices with energy-saving labels; turn off unnecessary devices, unplug when not in use; avoid using many high-power devices at the same time.
Every small action, from turning on the air conditioner properly, turning off the fan when not in use, to using LED lights instead of incandescent bulbs, contributes to reducing pressure on the national electricity system.
In Hanoi, Hanoi Electricity Corporation (EVNHANOI) recorded that the city's electricity consumption reached an all-time high of 5,988 MW at 1:20 p.m. on August 4. Notably, in just the first 4 days of August, electricity consumption increased by 1,300 MW (≈27%), showing that the demand for electricity has not shown any signs of cooling down. The above figures clearly reflect the impact of weather on electricity consumption habits, especially among household customers with the largest consumption proportion.
EVNHANOI also recommends that customers, offices and production facilities join hands to use electricity economically and effectively. Using electricity economically not only brings direct economic benefits to each household but also helps protect the power system, reduces the risk of local overload and ensures stable power supply for the entire city during peak hot days. With the message "Saving electricity - Becoming a habit", EVNHANOI hopes that the cooperation of each citizen will contribute to building a civilized, safe and sustainable electricity-using community.
Source: https://cand.com.vn/Xa-hoi/nang-nong-cuc-doan-duong-day-220kv-hoa-binh-ha-dong-gap-su-co-i777006/
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