Where should reactive power be increased if the voltage drops due to load pick-up in the morning?

Increasing reactive power close to the heaviest inductive load areas is the preferred strategy to address voltage drops due to load pick-up. When large inductive loads, such as motors or transformers, are in operation, they draw reactive power, which can lead to voltage instability. By providing additional reactive power nearby, the voltage at these load areas can be supported more effectively, minimizing voltage drops and maintaining system reliability.

Reactive power compensation devices, such as capacitors or synchronous condensers, are often deployed close to these loads to counteract the effects of inductive demand. This localized approach ensures that the reactive power is used where it is most needed, allowing for a quicker response to voltage fluctuations and enhancing overall system performance.

The other options present less effective solutions for managing reactive power. Addressing the issue solely at the generation source might not sufficiently counteract the localized demand from inductive loads. Similarly, injecting reactive power at the transmission end can create issues further down the line where the voltage levels may still drop. Distributing reactive power evenly throughout the system could lead to inefficiencies and does not consider the specific needs of heavily loaded areas.