Question

what is about power frequency variations?​

Answer 1

Explanation:

• Power frequency variations are defined as the deviation of the power system fundamental frequency from it specified nominal value (50 or 60 Hz). Sources:Due to faults on the bulk power transmission system, a large block of load being disconnected, or a large source of generation going off-line.

• Power frequency disturbances are low-frequency phenomenon that result in voltage sags or swells. These may be source or load generated due to faults or switching operations in a power system. • Power system transients are fast, short-duration events that produce distortions such as notching, ringing and impulse.