On September 14, the dispatch centre of NPC Ukrenergo activated emergency assistance from the power system of Slovakia to ensure operational safety and avoid disconnection of consumers of the Burshtyn TPP Island. The reason for this was the emergency shutdown of unit No.1 of Burshtyn TPP, the press service reports.
The volume of emergency assistance provided amounted to 1200 MWh, of which 1000 MWh – from 11:00 am to 9:00 pm on September 14.
On September 14, at 05:00 am, 7 of the 12 units of Burshtyn TPP were in operation. In particular, power units No.1 and No.6 have been under emergency repairs since September 9, power unit No.2 is under conservation since January 1, 2021, No.3 and No.4 are in current repairs.
At 05:01 am on September 14, power unit No.5 was shut down due to the formation of a fistula on the boiler; power units No.12 and unit 10 were also unloaded for 15 MW and 16 MW respectively.
After that, to compensate for the lost capacity, the dispatcher of NPC Ukrenergo gave a command to load (increase generation) Kalush CHPP by 25 MW. Later, at 10:00 am, Kalush CHPP was accidentally unloaded by personnel from 25 MW to 0 MW without losing its own needs due to a defect in the steam valve.
Subsequently, at 10:40 am, power unit No.1 of Burshtyn TPP (it was connected to the network at 6:07 am) was disconnected due to a fistula on the boiler, and power unit No.8 was also unloaded.
As a result, in order to ensure reliable power supply due to the lack of reserve capacities at the power plants of Burshtyn TPP, from 11:00 am on September 14 to 1:00 am on September 15, the dispatch centre activated emergency assistance from the power system of Slovakia.
At the same time, a violation of the schedule of export supplies of electricity from the trading zone of the Burshtyn TPP Island from 05:00 to 07:00 am by the amount of 187 MWh was recorded, from 10:00 to 11:00 am – 45 MWh, from 9:00 until 00:00 pm – 95 MWh.
Starting from 01:00 am on September 15, the schedule of export supplies of electricity from the Burshtyn TPP Island is being carried out without violations.
DTEK Energy commented on the situation with power unit shutdowns and noted that the frequent outages of units for repairs were caused by the consequences of a long-term systemic crisis in the energy industry, which has become critical in recent months.
Abnormally low tariffs that did not cover the minimum production cost of any electricity producer, the unresolved issue of debts in the balancing market (UAH 11 billion to all market participants, of which UAH 1.9 billion – to DTEK Energy) for a long time put thermal generation on the brink of survival.
“In the conditions when two-thirds of the power units of thermal power plants and a third of the units of nuclear power plants were forced to stop, DTEK Energy's TPPs were working at their maximum. In only 8 months. In 2021, compared to 2020, DTEK Burshtyn TPP increased electricity supply by 47% to 4.6 billion kWh. But it was technically impossible to work in such a crisis mode for a long time,” the message says.
The company also noted that by the end of the year, DTEK Burshtyn TPP will repair power units and station equipment in the amount of about UAH 223 million. The total cost of repairs at the station in 2021 is expected to reach UAH 534 million.