ABC of ABT - MP Power generating company limited

100CBAEFGH75DUNIT LOAD (%)50J25049.5 49.6 49.7 49.8 49.9 50.0 50.1 50.2 50.3 50.4 50.5FREQUENCY (Hz)Figure -7In the event of unforeseen tripping of a generating unit or of a major auxiliary(forced outage), which brings down the availability of the station suddenly, theoperator should quickly assess the possibility of bringing back the unit /auxiliary and resuming generation as per the given schedule. In case this ispossible within an hour or two, the operator should inform the RLDC that thestation’s availability declaration (for commercial purpose) and schedule shouldnot be revised. On the other hand, in case the station availability is foreseento remain curtailed for a longer duration, the RLDC should be formallyinformed about the change in station availability, along with the curtailmentduration, to the extent determined. The RLDC would give effect to theavailability change, and corresponding revision of schedules, after one hour.During the intervening period, the deviation from schedule would be recordedas UI, and the station would have to pay back for the shortfall at the prevailingUI rate, while getting paid the capacity charge and energy charge respectively24