When synchronizing two Islands with different frequencies, what is the preferred action?

When synchronizing two islands with different frequencies, directing the smaller island to change speed is the preferred action because it allows for a smoother and safer transition into synchronization. The smaller island is generally more flexible and capable of adjusting its frequency without compromising stability. By controlling the smaller island, operators can bring both systems closer in frequency, which is essential for successful synchronization.

Maintaining stability is crucial during this process, and by adjusting the speed of the smaller island, the risk of potential instability, that could arise from trying to alter the larger island’s frequency, is minimized. This method also adheres to the principle of reducing the magnitude of changes needed to achieve synchronization, hence protecting both systems involved.