Wind Farm Curtailment Logic
Golden Spread Panhandle Wind Ranch
• Golden Spread Panhandle Wind Ranch (GS PWR)
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78.2 MW
34 Turbines
Located just East of Amarillo TX in the TX Panhandle
Commercial Operations Date September 2011
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Capacity Factor: 48.59%
Effective Factor: 50.84%
Highest Monthly Capacity Factor: 60.89%
Lowest Monthly Capacity Factor: 36.57%
Average LMP: $23.29/MWh
Max LMP: $408.28/MWh
Min LMP: $-561.03/MWh
Curtailment
• EIS Market - Intermittent Status
• GSEC imports the (LIP) into SCADA from the
XML Listener data stream (We hope to be able
to get market prices from SPP via ICCP in the
future).
• A short program is written within SCADA to
evaluate the LIP prices and send a base point
to the wind farm control system if the criteria
is met.
Curtailment Continued….
• The logic will Curtail the wind farm (reduce output close to zero
without opening the breaker) if the instantaneous price is less than
or equal to a certain “extreme” price point or if the average price
for two consecutive intervals are less than or equal to a “less
extreme” dollar amount.
• The logic will Release the wind farm (increase based on actual
capability of production) if the instantaneous price is greater than
or equal a certain “extreme” price point or if the average price for
two consecutive intervals are greater than or equal to a “less
extreme” dollar amount.
• The logic will ignore any price change for 20 minutes after each
Curtailment or Release operation.
– Safety
– Oscillation
Curtailment Continued….
• The wind farm has local/remote control
capability, which allows the wind farm to
ignore the SCADA signal if needed.
• An email is automatically sent to the local BA
for notification of when the wind farm will be
curtailed and also when it will be released
from curtailment as a result of the “logic”.
• This email is sent 1 minute prior to being
curtailed or released.