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An electrical grid may have many types of generators and loads; generators must be controlled to maintain stable operation of the system. In an electric power system, automatic generation control (AGC) is a system for adjusting the power output of multiple generators at different power plants, in response to changes in the load.
English: Diagram of revolving-field single phase generator with two poles. As the rotor turns, the lines of force at two poles are cut by the coils inducing current. The output from two coils are "in phase".
English: Diagram of revolving-field single phase generator with four poles. As the rotor turns, the lines of force at fours poles are cut by the coils inducing current. The output from four coils are "in phase".
The sequence of events is similar for manual or automatic synchronization. The generator is brought up to approximate synchronous speed by supplying more energy to its shaft - for example, opening the valves on a steam turbine, opening the gates on a hydraulic turbine, or increasing the fuel rack setting on a diesel engine.
Date/Time Thumbnail Dimensions User Comment; current: 02:12, 17 October 2017: 277 × 289 (13 KB): Mikhail Ryazanov: 19:09, 11 January 2008: 277 × 289 (13 KB): Ken g6 {{Information |Description=A diagram of a thermoelectric generator.
A complete switchboard and generator control system [ edit ] The marine Power Management System PMS is a complete switchboard and generator control system to synchronize the auxiliary engines of the ships by implementing automatic load sharing and optimizing the efficiency of the power plant.
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Simplified single line diagram of a single-phase transfer switch to select either 'city' (utility) power or local generator power 3-phase Intelligent transfer switch. A transfer switch is an electrical switch that switches a load between two sources.