During the last four weekdays, on 21-24 April, the average daily power consumption in the IPS of Ukraine did not return to the one observed in the previous weeks and reduced by around 10% (up to 347 mln kW·h comparing to 387 mln kW·h in the previous weekdays), the difference between the night dip and the evening peak of consumption has increased from 4 GW to 4.8 GW.
The average daily electricity production at wind and solar power plants (WPPs and SPPs) remains at a high level, and comparing to the Easter holidays (18-20 April), it has increased by 10% (from 28 mln kW·h to 31 mlnkW·h). At the same time, HPP power production has decreased due to a decrease in inflow by approximately 25%, which led to very low participation of HPPs in covering peak loads.
These factors make it necessary to increase the share of semi-peak thermal generation in the power that can provide the required volume of reserves. At the same time, the NPP base load was limited by NPC Ukrenergo at the level not exceeding 8.3 GW to avoid the need for their repeated unloading from 25 April (minimum night consumption is expected to be at 11.9 GW).
It is worth noting that NPP base load limitation that took place on 19-20 April has resulted in significant decrease of surplus in the electricity market. Thus, from 9 to 20 April, the daily surplus in the electricity market was at average a bit over 53 mln kW·h, and from 21 April, it has decreased to 30.7 mln kW·h.
The surplus in the electricity market is the power, which was actually produced, but not sold to the end consumer under bilateral contracts in DAM or IDM. According to the current rules, all of it is sold in the balancing market. High electricity surplus artificially increases the volumes in the balancing market and complicates the power system balancing. Therefore, the correspondence between power production and power purchasing by end consumers is an important condition for efficient management of the power system and ensuring its manageability, as well as a means of proper balancing of electricity demand and supply.
It is also worth emphasising that solving the problem of balancing of the IPS of Ukraine in the mid- and long-term perspective requires measures to be implemented to increase its flexibility. In particular, construction of new high-maneuvering generation with quick start and power storages. The relevant recommendations of NPC Ukrenergo are given in the Report on sufficiency (adequacy) of generating capacities, which has been recently approved by NEURC.
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