How are crosscurrents minimized when the bus voltage is low and the power factors are different?

Raising the voltage to the leading unit is an effective method for minimizing crosscurrents when bus voltage is low and the power factors of the connected units differ. When there is a discrepancy in the power factors, the reactive power flows can lead to unwanted crosscurrents, which can cause imbalances and potential inefficiencies within the electrical system. By increasing the voltage specifically to the leading unit, reactive power can be managed more effectively; this reinforces its capability to supply real power while compensating for reactive demands in the system.

This adjustment can help stabilize the overall system operations, allowing the leading unit to operate more effectively and reduce the adverse effects of low voltage conditions. As a result, it enhances the quality of the power supplied and supports the integration of different units working at varying power factors without generating harmful crosscurrents.

The other choices would not address the problem effectively. Lowering voltage across all units would likely exacerbate crosscurrents rather than mitigate them. Disconnecting the units is a drastic step that would eliminate output rather than balance the power factor and address voltage issues. Increasing the load on all units could potentially lead to further imbalances instead of resolving the issues associated with crosscurrents and differing power factors.