Matching generation to load keeps grid frequency near 50 or 60 Hz.
Frequency indicates generation-load balance. Primary control (governor droop, ~4-5%), secondary control (AGC) and tertiary (dispatch) restore it. Low inertia from inverter-based resources makes control faster and harder.
If load exceeds generation, all generators slow and frequency falls.
Frequency is a sensitive indicator of the balance between generation and load, so frequency control keeps equipment and the grid safe.
Matching generation to load keeps grid frequency near 50 or 60 Hz.
Frequency is a sensitive indicator of the balance between generation and load, so frequency control keeps equipment and the grid safe.
A method where a generator's frequency drops slightly as its load rises, so several generators share load in proportion to their ratings.
The kinetic energy of rotating machines slows them slightly, and frequency falls until governors and reserves increase output.
Typical applications include responding to a sudden loss of a generator with fast reserves, setting the droop of a gas turbine to share load and controlling a battery system to support frequency after an outage.
Study "Power system stability" first (topic 76 of 106 in Electrical Engineering). It covers the groundwork this topic builds on.
Droop characteristic. Frequency bands ±0.5 Hz. Under-frequency load shedding.
If load exceeds generation, all generators slow and frequency falls.
The next topic is "Reactive power and voltage control", which builds directly on this one.
It is classed as Advanced in Electrical Engineering (topic 77 of 106). It is an advanced topic. It assumes you are comfortable with the intermediate topics in Electrical Engineering.
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