During the week of July 20-26, the volume of electricity consumption in the power system of Ukraine according to operational data amounted to more than 2.5 billion kWh, which is only 1% more than in the previous week of July 13-19 (2.47 billion kWh). Average daily consumption on working days increased by 2.3% (363.3 million kWh against 355.2 million kWh). Over the weekend, this figure decreased by 0.9% (346.3 million kWh against 349.3 million kWh). Compared to 2019, consumption on weekdays is lower by almost 2%, and on weekends – by 3.2%.
In general, since the beginning of the month, electricity consumption amounted to slightly more than 9.4 billion kWh, which is 6.7% higher than the forecast balance.
The unevenness of the load schedule (the difference between the night minimum consumption and the largest peak consumption in the evening) during the week averaged 4.5 GW.
Generation from RES
The total production of electricity from solar and wind power plants (SES and WPP) last week increased by 5.4% (to 239.7 million kWh against 227.5 million / kWh according to updated operational data), and the daily rate ranged from almost 30.4 million kWh (July 24) to 39.7 million kWh (July 22). Most SES produced on July 22 – 30.4 million kWh, and wind farms on July 26 – 14.8 million kWh
On July 21, at 4:56 p.m., three SES (Sanstar-Privilne, Nick Solar-2, Energi DEN) were de-energized due to the shutdown of the Bashtanka-Chervone-Shiroke 150 kV OHL by the distribution system operator Mykolayivoblenerho. At the same time, SES Sanstar-Privilne reduced generation from 3.8 MW to 0 MW. After 8 minutes (at 17:04) the generation at the specified SES was resumed.
Dispatch teams were not given to restrict wind farms and SES during the week.
In general, during the week the share of SES and WPPs in the structure of electricity production did not change compared to the previous period and amounted to 9%. At the same time, as of July 19, since the beginning of the month, RES produced 918.5 million kWh, which is 6.3% more than the forecast balance. At the same time, SES produced 6.2% more than forecast, and WES – by 11.1%.
Regarding electricity surplus
During the last week, the average daily volume of unsold electricity to the final consumer averaged about 76 million kWh. These volumes were sold on the balancing market to those participants (producers) who, in accordance with the Market Rules, submitted applications for unloading (ie, agreed to resell to their customers / consumers someone else’s electricity, instead of producing their own).
Generation from nuclear power plants
The average daily production at NPPs on July 20-26 compared to the previous week remained at almost the same level (189.9 million kWh against 190.5 million kWh). The total load of the NPP during the whole week was 8 GW. The total electricity production of NPPs according to operational data amounted to 1.33 billion kWh. The share of NPPs in the total production structure was 52%, which is 1% less than in the previous week.
There were no restrictions on the capacity of the NPP by the control center.
As of July 26, there were two nuclear power units in reserve, three are undergoing repairs and another 10 are in operation. Since the beginning of the month, NPPs have generated almost 4.9 billion kWh, which is 5.8% more than the forecast balance.
Generation of HPPs and TPPs
The total electricity production at HPPs during the last week amounted to 144.4 million kWh (against 125.5 million kWh in the previous week). At the same time, the average daily electricity production at HPPs increased by 15% (from 17.9 million kWh to 20.6 million kWh). In total, since the beginning of July, HPPs have produced 510.1 million kWh, which is 48.3% more than the forecast balance.
PSPs generated 26.9 million kWh during the week, and 109.5 million kWh since the beginning of the month, which is 2.8% more than the forecast balance. The total share of HPPs and PSPs on July 13-19 was 7% of total production.
Electricity production at TPPs during this period amounted to 589.8 million kWh against 592.2 million kWh in the previous week. The share of TPPs in production has remained at 23% over the last week. Since the beginning of the month, TPPs have generated slightly more than 2.4 billion kWh, which is 9.3% less than the forecast balance.
Provision of reserves
On the weekend of July 25-26, reserves were purchased for the first time on the island of Burshtyn TPP. Because on July 24, DTEK Zahidenergo, which includes Burshtyn TPP, received a certificate of compliance with the requirements for additional services and became a participant in the relevant market segment.
Therefore, on July 25-26, 100% of the manual reserve for frequency unloading (rRVCHr) – 20 MW – was purchased in the “island”. On Saturday, July 25, 45 MW (or 37.5% of demand) purchased a manual reserve for frequency recovery for loading (rRVCHz) with a demand of 120 MW, and 50 MW (41.6% of demand) on Sunday, July 26. At the same time, the automatic frequency recovery reserve (ARRF) was not purchased due to lack of proposals.
In the UES trading zone of Ukraine, the need for the frequency maintenance reserve (RF) was partially met – by an average of 17% (± 21 MW) due to the proposals of Kharkiv CHP-5.
At the same time, the average daily supply of ARVs was over 60% on weekdays and about 50% on weekends (with a minimum requirement of ± 372 MW). Reserves were purchased for all hours of the day in the amount of 75 to 367 MW. The demand for rRHF (628 MW for loading and 49 MW for unloading) was met in full during the specified period.