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Resource Control Performance Measure. A Continuous Measure of Delivery of Primary Frequency Response. By: Sydney Niemeyer NRG Energy. Resource Control Performance. One minute Average Data of Grid Frequency and the Resource’s Control Error (RCE).
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Resource Control Performance Measure A Continuous Measure of Delivery of Primary Frequency Response. By: Sydney Niemeyer NRG Energy
Resource Control Performance • One minute Average Data of Grid Frequency and the Resource’s Control Error (RCE). • Control Error = Actual Generation minus Expected Generation. • Expected Generation = Updated Base Point + Regulation Deployment + Expected Primary Frequency Response (EPFR). • EPFR based on Resource droop and dead-band setting.
RCPS1 Formula [ 2 – (RCE x Delta Hz)/(-10 x BiasResource) ] x 100 (Epsilon1)2 Delta Hz = Grid Frequency – Scheduled Frequency RCE = Resource Control Error BiasResource= Resource Seasonal Capacity/(60 x Droop x (-)10) Where Droop = 5% = 0.05 Epsilon1 = Current Grid Annual RMS1 of Frequency.
Grid Frequency Epsilon 1 = 0.0300 Hz BiasResource = -20 MW/0.1 Hz
Grid Frequency Epsilon 1 = 0.0300 Hz BiasResource = -20 MW/0.1 Hz 188.89 155.56 100.00 22.22 -77.78
Grid Frequency Epsilon 1 = 0.0300 Hz BiasResource = -20 MW/0.1 Hz
Grid Frequency Epsilon 1 = 0.0175 Hz BiasResource = -20 MW/0.1 Hz
Grid Frequency Epsilon 1 = 0.0175 Hz BiasResource = -20 MW/0.1 Hz 167.35 69.39 -93.88 -322.45 -616.33
Grid Frequency Epsilon 1 = 0.0175 Hz BiasResource = -20 MW/0.1 Hz
Example Generator Responding to Grid Frequency One minute average frequency and MW data.
Example Generator Responding to Grid Frequency – Hour Resource CPS 1
Determining Resource CPS 1 of a Single Non-Responsive Resource – Zero Delivery of Frequency Response
Actual RCPS1 for the Hour of any Non-Responsive Resource – MW Output Exactly on Target But No Frequency Response -19.678 RCPS1 value sets the Zero Delivery point for all Resources for This Hour.
Calculating Resource Frequency Response Delivery During This Hour From our Example: (258.4 – (-)19.678) X 100 = (200 – (-)19.678) 278.078 X 100 =126.58 % 219.678 -3.25 MW/0.1 Hz X 126.58 % = -4.114 MW/0.1 Hz Average Frequency Response Delivery during this hour.
Summary • Average delivery of Primary Frequency Response can be measured on a continuous bases. • Once known, the MW movement due to providing Primary Frequency Response can also be calculated (mileage). • The CPS calculation weights the evaluation when frequency is off schedule the furthest, when response is most important.