Woodward 2301E-HT, Руководство по эксплуатации продукта

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Manual 35092 2301E-HT Hydro (Francis Turbines)
Woodward 20
a +0.1% speed change (60.00 Hz to 60.06 Hz) will result in a gate position change of 2.0%. At 3% droop,
the same speed fluctuation would result in a gate position change of 3.3%.
Figure 3-5. Gate Position
The Level Control and Remote Reference Control algorithms calculate a droop speed set point to position
the gates to a desired position.
When the generator breaker closes, the default control mode is Droop Speed Control. The droop speed
set point can be raised and lowered using the Raise/Lower discrete inputs or Modbus. The Low Limit is
85%, and the High Limit is 100% plus the Droop percentage. For example, at 5% Droop, the High Limit
would be 105%.
When the on-line/Droop PID algorithm is not in control (Manual, Maintenance, Auto-Follow, Isochronous
control modes, Baseload), it calculates a droop speed set point based on the current speed and gate
position. This provides a bumpless transfer into On-line/Droop speed control.
The Droop Speed Set Point, or Speed Adjust, can be sent to the configurable analog output channel.
The on-line/Droop PID algorithm has a Feed Forward function that manipulates the PID feedback to
a
ccelerate the control’s response to set point changes. Feed Forward is only enabled when the control is
using the On-
line/Droop PID algorithm. The Feed Forward can be scaled by the “Feed Forward Gain,” or
it can be disabled by tuning “Disable Feed Forward?” to TRUE.
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