made that require future action or whether new settings should be made in view
of changed conditions.
4. Operators' instructions for procedures to be followed during emergencies. Such
emergencies include loss of major generating units, power system
disturbances, and incorrect functioning of any one or series of protective relays.
5. Underfrequency load-shedding or separation schemes.
6. Procedures for system restoration plan.
7. Adequacy of communications and accuracy of telemetered information during
system outage conditions involving high or low frequency, abnormal voltage, and
other unusual conditions.
8. Adequacy of station service power supply immediately after a major shutdown
and for subsequent startup. Need for additional sources of emergency station-
service supply and/or changes in circuit design to provide remote indication of
critical equipment (such as breaker position) during outages. Black start: (a)
requirement, (b) capability and (c) procedures.
9. Governor action and effect of droop setting following load rejection with respect
to hunting and frequency control. Causes of abnormal consumption of the energy
in governor oil tanks.
10. Review of performance of supervisory control and data acquisition (SCADA
or PMSC) systems during system disturbance.
11. With increasing complexity of control equipment and diverse modes of
operation of this equipment, it is more important than ever that standard
nameplates for relaying, control, and switch identification be adhered to at all
stations. Also, arrangement of devices on the control board to conform to
standard arrangements shown by standard drawings prepared in the Denver
office should be adhered to insofar as possible. Standard drawings are
available for typical control board panels, such as for generators and other
major equipment (see appendix A). A periodic review of existing nameplates
should be conducted to ensure that:
a. Nameplates are located so that they are readily visible and so that each
nameplate will identify the item of equipment for which it is intended without
b. Nameplate engraving with high contrast and location are consistent for