What scenario does a maintenance outage tend to occur in?

A maintenance outage typically occurs during scheduled service times. This is because maintenance is often planned in advance to ensure that the equipment is running efficiently and safely. By scheduling these outages, operators can perform necessary inspections, repairs, or upgrades without disrupting the overall generation capacity. Scheduling during off-peak times, when electricity demand is lower, helps minimize the impact on the grid and ensures reliability of service.

The other scenarios do not align with the nature of planned maintenance outages. Unexpected equipment failures may cause emergency outages rather than maintenance. Following peak generation periods could suggest a need for maintenance, but such work would generally be scheduled ahead of time rather than waiting for a peak to end. Random intervals imply a lack of control and planning, which is contrary to best practices in maintenance management.