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This is related to an island grid. There are four identical engines. Each is about 3 MW supplying suppling power to a small (finite grid). The generators are supplying a country. All engines are operating in iscochronous loadsharing mode using woodward 2301 D. The operators sometimes has to adjust the excitation in order to balance the load equally on all gensets. The plant manager would like to have balance the var automatically. Actually would like to reduce operator intervention on the control side as much as possible. The voltage regulator that is in place is the Cosimat N+. There also is a QPF (reactive current and cos phi regulator and balancer). The QPF and the Cosimat N+ are interconnected. Thus the possibility exist to do the balancing of the VAR. But so far I can read an fixed Var setpoint need to be set at the QPF. Since that generators are te only generators on the grid and that the VAR is determined by the load, can we still do the var balancing by setting a fixed var setpoint? I think this is not a good idea but appreciate your feedback. Since I do not have experienced doing this on finite grid I do not know how this may be affect the voltage in transient conditions. I assume that in stable conditions the affect on the VAR balancing on the voltage can be be very small, but would appreciate feedback on this to.
Thx in advanced for your feedback
Thx in advanced for your feedback