Load Characteristic Model: LDVFD_A

 

Following corrections are automatically when using LDVFD_A when simulating.

  • For parameters Tv, T1, and T2
    If T < 4*TimeStep then T = 4*TimeStep

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

Model Equations and/or Block Diagrams

Parameters:

K1 Washout gain for active power (pu)
T1 Time Constant for active power (seconds)
K2 Washout gain for reactive power (pu)
T2 Time Constant for reactive power (seconds)
Pmax Maximum value of active power (as a multiple of the initial MW output)
Qmax Maximum value of reactive power (as a multiple of the initial Mvar output)
V0 voltage break-point for low voltage cut-out of the inverter (Multiplier = 0.0 at this voltage)
V1 voltage break-point for low voltage cut-out of the inverter (Multiplier = 1.0 at this voltage)
Tv0 voltage break-point for low voltage cut-out timer (If voltage stays below vl0 for more than tvl0 seconds, then the multiplier will remain zero for the simulation)
Tv1 voltage break-point for low voltage cut-out timer (If voltage stays below vl1 for more than tvl1 seconds, then the multiplier will track a depressed curve according to Vrfrac and an internally tracked value of the minimum voltage experienced during the simulation)
Vrfrac fraction of device that recovers after voltage comes back to within vl1 < V < vh1 (Note that the timers Tvl1 also impact when this fraction is used)
Tv time constant on the output of the voltage cut-out
Pfinit Initial power factor (used when part of a CompLoad)