Water level is continuously low, Ban Ve Hydropower Plant only operates at 40% capacity

Informing VTC News , Mr. Ta Huu Hung, Director of Ban Ve Hydropower Company (Nghe An) said that for many days now, the water flow at the lake has been continuously low, currently the water level at the reservoir is only 2m higher than the dead water level (155m).

Low water levels mean Ban Ve Hydropower Plant can only operate at 40% capacity. (Illustration photo: EVN).

In particular, in the past two months, Nghe An has experienced many severe heat waves, very little rain, and temperatures ranging from 39 to 42 degrees Celsius, causing the reservoir water level to fluctuate only 156 - 158m, 1-3m higher than the dead water level, so the plant can only generate electricity with a discharge flow equal to the water flow into the reservoir.

"According to regulations, only in special cases to meet energy security requirements can we continue to exploit the lake below the dead water level. Currently, the power generation output of Ban Ve Hydropower Plant only reaches about 40% of its capacity," said Mr. Hung.

According to Mr. Hung, from the second half of June and the first days of July, the weather in the Central region continues to be extremely hot, the downstream of Ca River is experiencing a shortage of water supply to the downstream, so the power generation of the plant is also limited.

“According to our forecast, it will not be until the end of July and early August that the Central region will have floods, the water in the hydroelectric reservoir will rise and the maximum capacity will be exploited according to the direction of the National Power System Control Center,” Mr. Hung added.

Ban Ve Hydropower Plant in Tuong Duong District is the largest hydropower project in the North Central region with a reservoir capacity of over 1.8 billion m3, the useful capacity from the elevation of 155m - 200m is 1.3 billion m3 of water. Due to the impact of prolonged heat, the water flow to Ban Ve Hydropower Reservoir is very low. The measured amount of water flowing into the reservoir at the present time is an average of 66m3/second, compared to the same time in 2022 of 105m3/second.

Ensure electricity supply

Meanwhile, speaking about the electricity supply situation in the North in recent days, Mr. Tran Viet Hoa - Director of the Electricity Regulatory Authority (Ministry of Industry and Trade) - said that the water flow to hydroelectric reservoirs in the North has improved. The current water level of Son La, Lai Chau, Tuyen Quang, and Ban Chat reservoirs has accumulated 9 - 20m higher than the dead water level.

Lai Chau, Tuyen Quang and Huoi Quang hydroelectric plants have also begun to mobilize capacity to the national grid.

As of the morning of July 3, the water level of hydroelectric reservoirs in the Northern and Southeastern regions has increased slightly, while some reservoirs in river basins and small streams have high water levels. Large hydroelectric reservoirs in the Northern, North Central, Southeastern, and Central Highlands regions are raising their reservoir water levels and generating electricity according to the operating and mobilizing procedures of the operating agencies.

Specifically, the lake water level/dead water level at Lai Chau Lake: 292.76 m/265 m; Son La Lake: 186.65/175 m; Hoa Binh Lake: 99.99/80m; Thac Ba Lake: 47.93/46 m; Tuyen Quang Lake: 103.71/90m; Ban Chat Lake: 446.73/431m; Trung Son Lake: 156.14/150 m (minimum regulation: 150.0m); Ban Ve Lake: 157.95/155.0 m (minimum regulation: 162.8 to 167.8 m); Hua Na Lake: 220.50/215 m; Binh Dien Lake: 64.66/53 m (minimum regulation: 63.7 to 66.0m); Huong Dien Lake: 50.41/46 m (minimum regulation: 48.6 to 50.0m)…

Forecast of 24-hour water flow to lakes in the Northern, Central Highlands, and Southeast regions to increase slightly; North Central and South Central Coast regions to decrease slightly.

According to the assessment of the Electricity Regulatory Authority, the North is in the early flood period. It is expected that in the coming time, the water flow to the lakes in the North will continue to increase and can ensure electricity supply with an average calculated load of about 421-425 million kWh/day.

According to the forecast of the National Power System Control Center (A0), during the hot period from July 2 to July 12, the load in the North can reach an average of about 440 million kWh per day (the highest is about 470 million kWh/day with a peak capacity of 23,000 MW).

In response to this forecast, the Ministry of Industry and Trade has resolutely directed A0 to proactively develop and regularly update flexible scenarios to respond to difficulties in electricity supply, ensuring the security of the electricity system. Closely follow the weather and hydrological conditions of hydroelectric reservoirs, the operation of power sources to make flexible adjustments, regulate the water levels of large hydroelectric reservoirs to ensure mobilized capacity and adjust the frequency of the electricity system.

Vietnam Electricity Group (EVN) also requested power generation units, A0 and power trading companies to synchronously deploy many solutions to ensure power supply for the last months of 2023, and at the same time directed relevant units to focus on overcoming incidents at power plants.

In particular, EVN requires power generation units to focus on human resources, materials and necessary conditions to fix and soon put into operation the generators and boilers that are having problems at Pha Lai 1 and 2 thermal power plants.

Overcome the phenomenon of power loss below the standard during operation due to problems with auxiliary systems, input fuel quality, and cooling water temperature; increase the frequency of inspection and monitoring of on-site equipment operations to ensure the operational reliability of generators, detect and handle abnormalities early to prevent incidents, especially subjective incidents due to human error.

Units must prepare plans, human resources, materials, and equipment at the factory to promptly handle any incidents that may occur in order to restore operation of the unit as soon as possible.

PHAM DUY

Useful
Emotion
Creative
Unique
Wrath