Transcript PV Storage proposals discussion

PV and Storage Integration
strawman proposals &
discussion
John Adams
Principal Engineer
PV & Storage Workshop
October 15, 2012
Inverter based technologies to provide:
• PSS/E dynamic model for the inverter with associated
parameters.
• PSCAD dynamic model for the inverter with associated
parameters
• Expected fault characteristics of the inverter with full energy
available.
• Full Interconnection Studies (FIS) shall include three phase
fault at Point of Interconnect (POI) with which ERCOT can
analyze voltage ride-through.
• Inverters are to provide 95% of reactive requirement within 0.5
seconds after a step voltage change from 100% of nominal to
90% of nominal.
• Full Interconnection Studies (FIS) shall demonstrate that
voltage recovery after a fault is dampened within 6 seconds of
the end of the event.
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Tab X
ERCOT
Photovoltaic technologies to provide:
• To accommodate solar energy forecasts fixed position solar
farms shall provide ERCOT their latitude, longitude, alignment
of solar panels, and placement angle off horizontal.
• Solar farms of over 100 MW capacities shall supply Total Sky
Imager(1) and transfer sky images to ERCOT once every 30
seconds to facilitate short term cloud impact on energy
production.
• Metrologic data at 30 second intervals as follows:
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Air temperature
Back of panel temperature
Wind speed
Wind direction
Global horizontal Irradiance
• For concentrated PV installations, in addition to the above,
direct normal Irradiance shall be telemetered.
(1) From
“Benefits of Near-Term Cloud Location Forecasting for Large Solar PV”, a Thesis presented to
the Faculty of California Polytechnic State University by Timothy Robert Rudd, August 2011.
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ERCOT
Storage based to provide:
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Registration of maximum MW delivery capability
Registration of maximum MWH capacity
Registration of maximum MW charge rate.
Registration of Transition time from Charging => Discharge and
Discharge => Charge
Telemeter current available power capability (MW)
Telemeter current available energy availability (MWH)
Telemeter maximum rate of power delivery or charging change
(dP/dt) (MW/minute – telemetry represents delivery if current
state is delivering power, and charging if current state is
charging)
Telemeter status including new statuses: Charging,
On_reg_Charging, On_NS_Charging.
Telemeter transition time from current state (Charging or
Discharging) to other state (Discharging or Charging)
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Tab X
ERCOT
Discussion?