Machine Model: REGFM_B1

 

Following checks and corrections are applied during Validation and AutoCorrection.

  • For TPf, TQf, TVf time constant, any value less than Mult*TimeStep will be modified. If less than 0.5*Mult*TimeStep will be set to 0.0, otherwise it will be increased to Mult*TimeStep.

Mult represents the user-specified value Minimum time constant size as multiple of time step option on the Validation page of the Transient Stability Dialog

TimeStep represents the integration time step being used as described on TimeStep

Model Equations and/or Block Diagrams

Parameters:

wFlag Flag to select which speed deviation to use for Power-Frequency droop.
=0 to use Dwm; <>0 to use DwPLL
VdrpFlag Flag to select either Current or Reactive Power Droop. If QVFlag=0 then VdrpFlag will be ignored and treated as 0 regardless.
=0 for Power; <>0 for Current.
QVflag Input Mode Selection determines whether input value is Qref or Vref.
=0 to use Reactive Power Q as an input; <>0 to use Voltage as an input
PQflag PQ priority flag specifies a priority used for the steady state current limitation.
=0 to use Q priority; <>0 to use P priority
FFlag Flag determine if the Power-Frequency droop is enabled.
=0 to disable Power-Frequency Droop; <> 0 to enable Power-Frequency Droop
ESFlag Flag determines if the model supports energy storage (negative real power or current).
=0 to prevent negative angle; <> 0 to enabled negative angles for energy storage
Re Inverter coupling resistance [pu] (0.00 <= Re <= 0.25*Xe)
Xe Inverter coupling reactance [pu] (0.04 <= Xe <= 0.40)
mq Q-V droop gain. When Vdrpflag<>0, mq represents a per unit virtual impedance [pu]
kpv Proportional gain of the voltage controller [pu]
kiv Integral gain of the voltage controller (>0) [pu/s]
mp Power-Frequency Droop gain [pu]
Dwmax Upper limit of Dwm (>=0) [pu]
Dwmin Lower limit of Dwm (<=0) [pu]
kpPLL Proportional gain of PLL [pu]
kiPLL Integral gain of PLL (>0) [pu/s]
DwPLLmax Upper limit of the PLL output (>=0) [pu]
DwPLLmin Lower limit of the PLL output (<=0) [pu]
Tp Time constant of the low-pass filter in the VSM control block (>=0) [seconds]
H Inertia time constant [seconds]
D1 Damping [pu]
D2 Transient damping [pu]
wD Angular frequency of the washout block [1/seconds]
Issmax Steady state current limit [pu] (Issmax <= 0 is treated as 1/Xe) (Issmax <= 1/Xe) (Issmax <= Ifaultmax)
Kf PQFlag determines if Idmax = Kf*Issmax or Iqmax = Kf*Issmax (Kf<=0 is treated 1.0)
kI Integral gain for the active current limiting loop [pu/s]
Ifaultmax Transient fault current limit [pu]. (If Ifaultmax <= 0 then limit is ignored, but this is not recommended)
Tpf Time constant of the low-pass filter for active power measurement (>=0) [seconds]
TQf Time constant of the low-pass filter for reactive power measurement (>=0) [seconds]
TVf Time constant of the low-pass filter for voltage measurement (>=0) [seconds]
TIf Time constant of the low-pass filter for current measurement (>=0) [seconds]
Ke Scalar on Idmax for negative real steady state current limitation (0 <= Ke <= 1.0)
Vpllfrz Terminal voltage below which special PLL state freezing is implemented (Vpllfrz <= 0.10) [pu]