Which of the following factors is NOT synchronized when connecting to the interconnection?

When connecting to the interconnection, synchronization is crucial for establishing a stable grid connection. Frequency, voltage, and phase angle are all critical parameters that must be synchronized to ensure compatibility between the generating unit and the grid.

Frequency refers to the number of cycles per second of the alternating current; it is important that the frequency of the power produced by the generator matches that of the grid, typically at 60 Hz in North America. Voltage needs to be matched as well, ensuring that the voltage level of the generator aligns with the grid to avoid equipment damage or operational issues. The phase angle is related to the timing of the electrical waveforms; synchronization ensures that the phase angle is the same at the point of connection to prevent interference and to facilitate a smooth transfer of power.

On the other hand, load demand is not a factor that is synchronized during the connection process. Load demand refers to the amount of electricity that consumers are drawing from the grid at any given time. While it is important for system operators to be aware of load demand to maintain balance and stability in the electrical system, it does not directly factor into the synchronization process of connecting a generator to the interconnection.