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The Inverter nodal data provides timestep results for DC-to-AC conversion, including input DC characteristics, inverter efficiency, operating region determination, and AC power output for each inverter in the power plant.

Description of Nodal Data Parameters

ParameterUnitsDescription
Timestampyyyy-MM-dd HH:mm:ssDate and time for the calculation timestep
DC VocVOpen circuit voltage of all DC fields connected to the inverter input
DC Voltage at MPPVDC voltage at maximum power point from all connected DC fields, before inverter operating point adjustment
DC Current at MPPADC current at maximum power point from all connected DC fields, before inverter operating point adjustment
DC Power at MPPWDC power at maximum power point from all connected DC fields, representing the theoretical maximum available DC power
DC VoltageVFinal DC operating voltage at the inverter input after operating region and clipping adjustments
DC CurrentAFinal DC operating current at the inverter input after operating region and clipping adjustments
DC PowerWFinal DC power at the inverter input, calculated as DC Voltage × DC Current
Inverter EfficiencyRatio of AC power output to DC power input, determined from the inverter efficiency curve at the operating power level
Inverter LimitationWPower loss due to inverter operating outside the maximum power point, including DC voltage window limitations and power clipping
AC PowerWAC power output from the inverter after efficiency losses and any clipping
Inverter Region MPPInitial inverter operating region determined from the maximum power point DC voltage and power
Inverter Region finalFinal inverter operating region after adjustments for voltage window and power limitations
Design DeratePower factor or design derate applied to inverter output
AC Power Limit InputWAC power limit value provided as input to the inverter model
AC Power Limit FinalWFinal AC power limit applied after considering all constraints, reflects actual curtailment or clipping applied