How are cross currents between parallel generators minimized if the bus voltage is low and the power factors are the same?

Minimizing cross currents between parallel generators when the bus voltage is low and the power factors are the same can be effectively achieved by raising the voltage to all units.

When multiple generators operate in parallel, they need to be synchronized not only in phase but also at the same voltage level. If the bus voltage is low, a condition might arise where the voltage output of the generators can lead to imbalances, causing some generators to supply more current than others, resulting in cross currents. By raising the voltage of all units, the voltage at the bus bar aligns more closely with the individual generator voltages, leading to a more uniform distribution of load across the generators. This ensures that they all contribute equally to the load, minimizing the risk of overloading any single generator and reducing potential cross currents significantly.

In contrast, lowering the voltage or leaving it unchanged may worsen the situation by increasing the difference in load sharing, while raising the load on all units might lead to further discrepancies in performance and stability. Thus, raising the voltage of all units is the most effective approach in this scenario.