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I'm having a problem with three Wartsila/Stromberg gensets, 4160v, 4200 kW, 5900 kVA. When sharing, 2 of them will come on and offline as much as you want and will always share the kW and kVAr load. One will only share kWs. Each genset has a Stromberg AVR with droop correction via a CT on the V phase of the gen. Each of these CTs are connected to an 'Aux CT' which has a ratio of 5:1 (The main CTs are 1200:5). The secondaries of these aux CTs are connected together in delta and the resultant signals taken off to the input of the Stromberg AVRs. My question is this, with equal loads on the gens (achieved by manually adjusting AVR voltage reference) should the current flowing into the corrective input of each AVR be equal (I think yes!). I have one generator with about 0.3A flowing into the AVR correction input with the other 2 at about 0.15A. This with a bus load of about 350A per gen. Advice welcomed.
