Load Relay Model: LDST

 

Model Equations and/or Block Diagrams

Time Underfrequency Load Shedding Model LDST

Model supported by PSSE

Parameters:

f1 to f4 Frequency load shedding point
z1 to z4 Nominal operating time
tb Breaker time
frac Fraction of load to shed
freset Reset frequency
tres Resetting time