Parallel operation of multiple Gen-Sets

We have five 23MW dual Fuel Gas turbines tied to a common bus through a main-tie-main scheme which all have load sharing lines and Var controller which works great. We also have two Diesel 5.4MW Gen sets which run in parallel with the above T-Gens, we do not however have load sharing lines between the Gas Turbines and Diesel Gen Sets due to distance .

We currently run the turbines and diesel gen-sets in Base Mode (Kilo-Watt control), which means we run the diesel machines at a fixed KW setpoint.

Does anyone know of an efficient way to run load sharing lines a distance of 750 feet. Maybe some kind of fiber coupler????