Download AS Obligations to Intermittent Resources

AS Obligations to Intermittent
Resources
Reliant Energy
Credits
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•
•
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Primary Frequency Response – 30%
Voltage Support – 20%
Inertia or inertial-like response – 30%
Forecast accuracy – 20%
Primary Frequency Response
• IR must provide, based on Protocol
Requirements
• Must devise metric to determine if primary
frequency response is being provided –
i.e. was the response from controls, or just
an uptick in wind?
Voltage Support
• Must provide voltage support defined in
Protocols
• If appeal changes the nature of voltage
support, credit will reflect the change
Inertia
• Increase in wind will require additional
spinning mass to resist frequency
oscillations
• GE markets a WINDInertia product, but
PDCWG or ERCOT would need to
determine if electronic controls provide an
inertial-like response
• Other vendors may also provide controls
Forecast Error
• Forecast error causes increase in AS
procurements
• Metric would need to be created to
determine eligibility for forecast error
credit. QMWG?
AS Obligations, not Cost Allocation
• ERCOT would create obligations for
WGRs and other IRs.
• Obligation could be hedged (more
counterparties in market)
• RPRS is the exception – no obligation to
provide RPRS, merely a cost uplift to load
and intermittent resources
Next Steps
• Take proposal to WMS for endorsement
• WMS to assign metric creation and
request input from ROS/PDCWG
• Develop PRR with WMS direction to
include “how” and “why” language