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REPCAU two generators

Only one REPCAU model cannot use for two different generator, so each generator model needs have a REPCAU model. Nevertheless, it should work as a single plant controller. When there is only one generator, you can write a voltage setpoint in VAR(L) taking in account the Kc. For example, voltage at POI should be change from 1.0146 pu to 1.0222pu and initially VAR(L)=Vref=1.0142pu, so the Vref'=1.0142*1.0146/1.0222 = 1.0218. But if there are two generators, due to the different initial Qbranch, the initial VAR(L) will be differents. If a common Vref' at POI wants to be set, how should I proceed? Setting two differnt Vref' using the previous ecuation individually? Changing the Vref only in one REPCAU? Thanks in advance