According to NSMO, statistics from the National Hydrometeorological Service showed that in October, 35 rainfall records were recorded; including 20 daily rainfall records and 15 monthly rainfall records. It is forecasted that in November, the situation of storms and tropical depressions may develop complicatedly. On November 6 and 7, storm No. 13 (KALMAEGI) made landfall in Vietnam and brought heavy rainfall, directly affecting the operation of the national power system.
Due to the impact of the storm and the circulation of storm No. 13, the amount of water flowing into hydroelectric reservoirs increased. This led to 80/122 hydroelectric reservoirs with a total hydroelectric capacity of up to 16,000 MW having to discharge (on November 7). At the same time, wind power increased to about 3,400 - 4,000 MW, 2,000 - 3,000 MW higher than the previous days, while the load demand was low, and some loads were even lost due to the impact of the storm. The above factors caused the national transmission system to experience a state of excess power and overload for a long time during the day. This situation even occurred continuously in October and November, making it difficult to regulate the power system.
NSMO said it had to continuously monitor and adjust the mobilization of power sources. In particular, NSMO had to make difficult dispatch decisions, including reducing mobilization from hydropower plants that were releasing floodwaters and renewable energy sources (wind power, solar power) to ensure safe operation of the national power system and power plants.
In addition, to prepare for importing electricity from Laos according to the agreement between the two governments, on November 9 and 10, the National Power Transmission Corporation (represented by the Central Power Project Management Board) will cut off power to construct the 220kV Tuong Duong - Do Luong and Do Luong - Nam Cam lines. This requires cutting off power at the same time on 4 220kV lines, which will affect the power generation capacity of hydropower plants in Nghe An, power plants in Laos and the ability to supply power to the loads of Nghe An Power Company. Next, it is expected that by the end of 2025, the units will continue to carry out the connection of the 500kV Quang Tri transformer station to increase the import capacity and release the capacity of power sources in the region, in order to ensure power supply for 2026 and the following years.
According to the National Hydrometeorological Forecasting Department, from now until the end of the year, there may be 3 more storms/tropical depressions in the East Sea; of which, 1-2 storms are likely to affect mainland Vietnam, causing rain and greatly affecting the operation of the national power system.
NSMO requested power generation units (thermal power, hydropower, renewable energy) and grid management units to continue to closely monitor weather developments and proactively coordinate closely to ensure the goal of "safety, stability and continuity" of the national power system.
Source: https://baotintuc.vn/kinh-te/dieu-do-linh-hoat-giu-an-toan-he-thong-dien-trong-mua-bao-20251109125233965.htm
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