Jan 27, 2023

Mawazo Writing Africa

Writing about the main

SA’s had more load-shedding in 2022 compared to the same period last year

By May 10, Eskom had implemented 32 days of load shedding this year, compared to 26 days in the same period last year.

Eskom CEO André de Ruyter gave an update on the status of the on Wednesday System and utility operating performance.

He said the power grid is constrained, with an increased risk of load shedding in winter, particularly during morning and evening peak hours.

In the next few weeks Eskom will restart two units at the Kusile power plant and Unit 2 in Koeberg, which is scheduled to return by the end of June 2022.

The three major generation units will add about 2,500 MW to the system.

< p>“Unit 2 at Koeberg is expected to return to service along with the two-generation units after modification and correction of design deficiencies at one unit and repairs to flue gas desulfurization technology at the other unit at Kusile, will meet demand dr uck significantly reduce in time for the height of winter. d require. These Kusile blocks will add a combined 1,600 MW to the power system, while Koeberg 2 will add another 920 MW when it comes back into service by the end of June.”

He said Eskom has had to do so since January a single unit at Koeberg, while the other unit was shut down for routine refueling and maintenance.

“In addition to this Koeberg capacity, which was offline for the period, Eskom also had to make do without the 794 MW that would normally be deployed due to the damaged unit 4 of the Medupi power plant. Together, these two entities are responsible for implementing nearly two stages of load shedding.”

Jan Oberholzer, COO of the group, said the utility was using more diesel than expected for its open-cycle gas turbines due to system constraints (OCGTs).

The increased load shedding was due to a higher level of unplanned asset outages, which averaged 26% of the fleet through the end of March 2022.

During this period, the Average Energy Availability Factor (EAF) at 62%.

Oberholzer said SA urgently needs additional generation capacity between 4,000 MW and 6,000 MW to effectively implement the RMR (Reliability Maintenance Recovery) program while supporting a growing economy to supply power operating time, the gap will increase. Bringing new capacity online as quickly as possible is critical and requires a SA Inc approach.”

Coal stocks are healthy, with an average lifespan of 38 days, Medupi and Kusile excluded.

“Coal stocks increase to an average of 77 days’ worth of shares when these two are included.”

Oberholzer said that Koeberg’s long-term operations are ongoing to enable operations for another 20 years beyond 2024/2025.

Eskom will submit the necessary documentation to the National Nuclear Regulator (NNR) for assessment by June.

„ Significant progress is also being made in the completion of the newly built Kusile power plant. Unit 4 reached a full load of 800 MW on January 11 and successfully completed the 30-day reliability run on April 27 while commissioning tests for commercial operation continue. The unit was first synchronized with the national grid on December 23, 2021 and is on track for commercial operation by July.

Modification and correction of key design flaws at the Medupi boiler plant have been completed.

“This has greatly improved the power plant’s performance and helped limit the implementation of load shedding. Medupi’s Energy Availability Factor (EAF) increased to 67% by the end of April, up from 46% in April 2020 before the changes.

“Each unit of the six generations had to be shut down for 75 hours days for this work. This will prove a worthy sacrifice for the people of SA who endured long hours of load shedding to allow Eskom to correct these poor designs.”

Oberholzer said once the agreed technical solutions are finalized for both stations Eskom expects Medupi and Kusile to form the backbone of an evolving and greener energy system that will lead SA into a more sustainable and dynamic energy industry Transmission Segomoco Scheppers said the outlook showed an increased risk of load shedding.

“A What speaks for the country is the top-notch and effective management by the transmission system operator, whose main task is to maintain the balance between supply and demand,” said Scheppers.

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