Improved generation performance and lower unplanned outages have reduced Eskom’s reliance on diesel-powered emergency generation as the utility reports continued grid stability and stronger reserve margins.
In a system update released this week, Eskom said generation recovery initiatives and improved plant reliability contributed to improved operational performance. Year-to-date energy availability factor (EAF) performance has remained above 65% while the system achieved EAF levels above 70% on multiple occasions during the financial year.
Unplanned outages have also declined substantially compared to the same period last year. Lower levels of breakdowns have reduced pressure on open cycle gas turbines, which are typically used during supply shortfalls and periods of peak demand.
Eskom has identified elevated diesel consumption as one of the consequences of prolonged fleet instability and load shedding.
According to the utility, unplanned losses have declined by approximately 5,2 GW compared to the previous winter outlook period while planned maintenance levels remain elevated as part of its generation recovery strategy.
The utility maintains that increased planned maintenance is necessary to restore long-term reliability despite temporarily constraining generation availability.
Improved operating conditions have also supported stronger reserve margins and continued grid stability heading into the winter period.
However, Eskom cautioned that the power system remains constrained and vulnerable to unexpected generation failures, particularly during periods of elevated winter demand.
Continued operational improvements remain dependent on generation recovery efforts, execution of maintenance programmes and disciplined system operation, the utility said.
