Load Sharing Between Two Different Rating Generators

As u have mentioned both machines have different droop characteristic machine with higher droop will have more load variation with frequency (accept more load in case frequency falls & reject load when freq. rise.). I m not sure of VAR load sharing. It is taken care by automatic voltage regulator

Her is an example in fig

In case both machine having different droop characteristics, the load is shared between the machines in such a manner that the volt drop is the same in each and therefore , the machine with the higher characteristic will take the greater proportion of the load If the paralleled sets are of the different ratings, provided that the droop setting of each of the sets are the same, the load will be shared proportionally to their ratings If the droop is not the same, you can parallel as set by adjusting the base speed until the sets share the load. If you have a modern load sharing control panel you should be able to program the size of the various sets into the load controller

Sir,

Can we programme a suitable logic with a PLC (or DCS system), if load sharing panel is not available.

Higher rated machine should be set at less droop than that of lower rated machine,for equal load sharing and smooth operation of system.If both machine ratings are equal,droop should be equal.

Difinitely there are electrically powered / digital controlled governors thatU has droop features such as the Woodward. You may read your woodward manual on how to do it. proportion Kilowatt sharing is done thru speed adjusting of generator when in parallel operation. The var or power factor is done thru avr with droop characteristics. There are modern governor controller that is being interfaced digitally likewise also the avr. Years ago these these features used analog control (such as potentiometer) to avail the droop characteristics of avr and gov controllr.