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Extra info for ANSI-IEEE 1010-1987 Guide for Control of Hydroelectric Power Plants

Example text

Typical starting times for this method are from three to Þve minutes. Figure 3K-4 shows a one-line diagram for synchronous starting. Semi-Synchronous Starting. Sometimes referred to as reduced frequency, reduced voltage starting, the semisynchronous starting method depends on the transfer of rotational energy from a spinning generator to the pump unit. Prior to pump starting, the generator is accelerated to about 80% of rated speed, and its wicket gates are held at a Þxed position. The pump unit is tied to the generator through a starting bus.

FIG 3H-1) 3SS On-off command to start/stop solenoid 65SS C, P H-12 The start/stop solenoid 65SS typically operates as follows: ¾Energized to allow wicket gates to open and close under control of the electric governor, gate limit or manual gate control, that is, Òenergized to start and runÓ ¾Deenergized to initiate complete closure of the wicket gates at maximum rate and block subsequent opening of the gates, that is, Òdeenergized to stopÓ In some applications, 65SS may be Òdeenergized to start and runÓ and Òenergized to stopÓ although this method may not be fail-safe for loss of control voltage.

51 Starter overcurrent P, A Trips static starter*, alarms. 52b Cooling system feeder breaker tripped P, A Trips static starter*, alarms. 59 Starter overvoltage P, A Trips static starter*, alarms. 63 High cooling water pressure P, A Trips static starter*, alarms. 80 Cooling oil low flow P, A Trips static starter*, alarms. Encoder impulse failure A Encoder plug trouble P, A Trips static starter*, alarms. TYPE C =Control P =Protection Trip A =Annunciation/Event Recording T =Temperature Monitoring *When starter trips, pump unit will shut down.

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ANSI-IEEE 1010-1987 Guide for Control of Hydroelectric Power Plants


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