Power grid

Power grid frequency

The power grid frequency in a three-phase network refers to the frequency of the electrical energy fed into the grid in the form of alternating current. The frequency is directly linked to the speed of rotation of the synchronous generators. In a synchronous power supply grid, the frequency is uniform and remains constant with the exception of minor control deviations from the rated value.
A grid frequency of 50 Hertz is used for the general power grid (interconnected systems) in Europe, Asia, Australia and the majority of Africa and South America. Grid frequency acts as an indicator of the quality and the stability of a transmission grid. For the grid frequency to remain stable, supply and demand in the power grid must be kept in balance at all times. The job of APG as the control area operator is to maintain this delicate balance in the APG control area. Deviations from the 50 Hertz target frequency can lead to service interruptions over a widespread area if not remedied quickly.