Despite facing a situation of high system load, with prior preparation and flexible operation, the electricity supply situation last week continued to be well ensured.
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| During the week, many new records for maximum power (Pmax) and daily electricity consumption were set. |
The Electricity Regulatory Authority (Ministry of Industry and Trade) said that in week 17/2024 (from April 22 to April 28), due to the impact of the hot weather in the three regions, especially in the North, the load demand was high with an average daily output of 946.6 million kWh, about 65.4 million kWh higher than the previous week (about 80.9 million kWh higher than the April method), in particular, the average load in the North last week increased by more than 31.7 million kWh/day compared to the previous week.
Electricity consumption sets new record
In particular, during the week, many new records for maximum capacity (Pmax) and daily electricity consumption were set.
Specifically, at 1:30 p.m. on April 27, 2024, the national maximum capacity reached 47,670 MW; the national electricity consumption on April 26, 2024 reached 993.974 million kWh.
Compared to the same period in 2023, on days like April 26, the daily output of the national power system increased by 23.1%, the output of the Northern power system increased by 35.5%; on April 27, the maximum capacity of the national power system increased by 20.2%, the maximum capacity of the Northern power system increased by 19.9%.
Accumulated from the beginning of the year until now, the national load has increased by about 11.2% compared to the same period in 2023 (North increased by 11.3%, Central region 8.5%, South 11.7%).
Despite facing a situation of high system load, with close monitoring and direction, prior preparation and flexible operation, the electricity supply situation last week continued to be well ensured.
Updated data on maximum capacity and daily electricity consumption tend to decrease gradually, specifically by April 29, 2024, Pmax decreased to 41,601 MW, daily electricity output decreased to 879,360 million kWh. However, these figures are still high, especially compared to the same period in 2023.
Flexible operation and mobilization of power sources
During the week, the regulatory agency flexibly and economically operated hydroelectric reservoirs in sync with solutions to change the transmission grid connection to maintain the maximum reservoir water level, ensuring the effective water intake capacity of the irrigation works, while ensuring water for power generation, especially during peak hot weather, ensuring power supply in 2024. The average daily exploitation output during the week reached about 174.6 million kWh.
For coal-fired thermal power sources, the average daily output during the week is about 556.9 million kWh (36.1 million kWh higher than the April plan). Currently, all available coal-fired thermal power units on the system have been mobilized. There are no units unavailable due to lack of coal. However, the total output shortage due to incidents and capacity reduction during the week is 318.25 million kWh and 95.98 million kWh, respectively.
The average daily mobilized gas-fired thermal power source is about 91.1 million kWh (13.1 million kWh higher than the April plan). In week 17, Phu My 2, Phu My 4, and BOT Phu My 3 units had to be mobilized to use LNG to increase source availability and support hydropower savings in the North when the load increased due to the hot weather on weekends.
Renewable energy sources (excluding hydropower) are mobilized according to the announcement and expected generation capacity according to the plant's primary energy, taking into account the transmission constraints of the grid and the absorption capacity of the system with an average daily output of about 105.5 million kWh, of which wind source is 13.9 million kWh.
During the week, the transmission trend on the 500kV grid continued to be from the Central to the North and the Central to the South. The heaviest transmission level was on the 500kV lines Nho Quan - Nghi Son - Ha Tinh, Vinh Tan - Song May (95%), Vinh Tan - Tan Uyen (92%).
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| EVNHANOI strengthens inspection of power grid corridors. Photo: EVN |
Persistently implement load balancing in all three regions
According to the forecast of the National Center for Hydro-Meteorological Forecasting, in the next 10 days, the heat may decrease in the evening, in many places there will be rain and thunderstorms... the maximum capacity and electricity demand may decrease, but we must not be subjective, we still need to closely monitor, flexibly operate and strengthen electricity saving measures, persistently implement the load regulation program to meet the peak capacity of the power system in all 3 regions of the North, Central and South.
Accordingly, regarding power source operation, for hydropower, it will continue to exploit according to the actual hydrological situation and optimal regulation orientation in the May 2024 operation plan, meeting grid constraints/system demand, water level and downstream water supply requirements according to the Inter-reservoir Process; Mobilizing coal-fired thermal power plants according to system demand, while ensuring grid transmission limit constraints, system inertia and voltage quality.
Mobilize gas turbine plants according to system demand, while ensuring grid transmission limits, voltage quality and safe and stable operation requirements of gas fields as requested by PV GAS.
Mobilize the maximum possible renewable energy from primary fuel sources, ensuring the power system operates safely, reliably, stably and without overloading the elements of the power system.
Mobilize oil-fired sources when necessary; Create maximum conditions for new power plants to test.
The Electricity Regulatory Authority has also proposed solutions to operate power sources to ensure safe and continuous power supply, especially during the peak dry season of 2024.
Prioritize maximum hydropower water storage, prepare fuel (coal, oil, gas) for thermal power plants; complete planned repairs of generators, promptly fix generators. In particular, do not repair generators in the North during the peak of hot weather from April to July. In case of abnormal hydrological developments in a bad direction, it is allowed to postpone plans to repair coal-fired thermal power plants to increase the availability of the power system.
| The Electricity Regulatory Authority requires power plants to increase reliability and availability, especially during hot weather; recommends the Provincial People's Committee and the Ministry of Natural Resources and Environment to flexibly regulate in the short term the temperature of cooling water discharged into the environment during peak hot weather periods (Mong Duong 1 & 2 power plants); and increase spare materials for auxiliary equipment of generators/transformers. |
The competent authority also requires the Electricity Corporations to accurately forecast the maximum load capacity, clearly announce the ability to implement DR and the ability to mobilize customers' borrowed Diesel sources so that A0 can update calculations and make operational plans.
Investors of power plants (especially coal-fired thermal power plants in the North) must ensure the availability and reliability of generators and the entire plant, and prevent incidents during the peak months of the dry season; prepare enough fuel for power generation according to the mobilization needs of the system. This is a very important task, decisive to the ability to ensure safe power supply during the peak months of the dry season because coal-fired thermal power is expected to have a total mobilized output of ~52 - 60% of the total system output during the peak months of the dry season.
The National Power Transmission Corporation and Power Corporations continue to review and ensure that compensation equipment is ready for operation, ensuring installed capacity; ensuring special discharge circuits, ensuring safe and reliable operation.
( According to baochinhphu.vn )
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