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The summary report for 2020, implementing the tasks in 2021 of the electricity industry’s “big brother”, Vietnam Electricity (EVN), mentioned the word “redundant source” no less than 2 times.
Consequently, on the days of December 30, 2020 to May 5, 2121, every day, on average, around 30 solar energy projects cannot mobilize even 1kWh to generate electricity to the national electricity system. The reason is that “the transformer T1 of the 110 Cu Jut station is overloaded due to the reverse generation of the solar energy system” of the projects in the area.
Power outage due to excess power
Specifically, according to a written reflection by Cong Ly Company, on the morning of December 27, 2020, when the Bac Lieu wind power plant was generating electricity in the 6-11 MW range, it received a dispatch order to reduce capacity. to 2 MW. .
Also on this day, Trung Nam Thuan Nam solar power project with 450 MW capacity from Trung Nam Thuan Nam Solar Power Company Limited was requested to deflate more than 360 MW (about 80% of design capacity) . According to this business, this is not the first time, since since the date of official commercial operation until now, this project has been regularly cut in generation capacity.
According to their research YouthDecember 27, 2020 is one of the days when the power load (capacity consumption) drops very low, usually at 13 o’clock, the power system load is only 20,595 MW (while the capacity total current energy source) is approximately 68,000 MW). So, in fact, this is one of the days when the solar power capacity has dropped the most, at 3,000 MW. The day before, at noon on December 26, the system had to reduce to 2,000 MW of solar energy.
Statistics from the National Load Dispatch Center (A0) show that in 2020, up to 365 million kWh of solar energy has been forced to reduce deflation (cut). Particularly in the second half of November 2020, due to the strong growth of solar energy, especially solar energy on rooftops, the electricity sector had to make about 20 cuts due to excess supply, with a total production cut of 35 million kWh.
“Lack of electricity gives a headache, excess energy is tiring”
Solar energy represents 25% of the installed capacity of the electrical system thanks to the outstanding growth in 2020 |
However, if before, deflation and the dismissal of solar energy mainly due to the overload of the line, on January 1, 2121, perhaps for the first time in history, A0 had to say that “You cannot mobilize all the available capacity of the power source. ” because … excess electricity, including renewable energy sources like wind and solar power.
The report summarizing the Vietnam Electricity (EVN) summary conference took place in mid-January the last time the word “oversupply” was mentioned. “The proportion of renewable energy sources increases, which creates difficulties in the operation of the system and generates a situation of” oversupply “in the hours of noon and holidays, weekends, EVN said.
Mr. Nguyen Duc Ninh, Director of A0, said that in 2021, A0 is expected to reduce 1.3 billion kWh of electricity in renewable energy, of which 500 million kWh is due to excess energy, low noon and low overload operation of 500 kV lines.
However, the continuous reduction of solar energy has put Mr. Duong Quang Thanh, chairman of the EVN member board, facing a lot of pressure from solar manufacturers. Mr. Thanh said that recently, solar power plant developers often sent text messages to complain that their projects were being cut.
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