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A voltage step test can be done by changing VAR(L+3) in REECA1 model, if QFLAG=1 and VFLAG=0.
The calculated bias is 0 if PFFLAG=0 and it is Vinitial if PFFLAG=1. Update the value during the simulation with the wanted voltage step change.
Example 1: Step change 5%, PFFLAG=0; Change VAR(L+3) to 0.05
Example 2: Step change 5%, PFFLAG=1; Vinitial = 1.01; Change VAR(L+3) to 1.06
You need to use a plant controller, e.g. REPCA1, to make a step change in active power (Pref) or reactive power (Qref).
