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The rotor of a turbo generator is a non-salient pole type usually with two poles. [5] The normal speed of a turbo generator is 1500 or 3000 rpm with four or two poles at 50 Hz (1800 or 3600 rpm with four or two poles at 60 Hz). The rotating parts of a turbo generator are subjected to high mechanical stresses because of the high operation speed.
The drawback of the Krämer drive is that the machines need to be overdimensioned in order to cope with the extra circulating power. This drawback was corrected in the Scherbius drive where the slip power is fed back to the AC grid by motor generator sets. [8] [9] The rotating machinery used for the rotor supply was heavy and expensive.
Droop speed control is a control mode used for AC electrical power generators, whereby the power output of a generator reduces as the line frequency increases. It is commonly used as the speed control mode of the governor of a prime mover driving a synchronous generator connected to an electrical grid. It works by controlling the rate of power ...
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Due to high cost of a generator, a set of sensors and limiters will trigger the alarm when the generator approaches the capability-set boundary and, if no action is taken by the operator, will disconnect the generator from the grid. [3] D-curve expands with cooling. The D-curve for a particular generator can be expanded by improved cooling.
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".
A 500 MW Siemens multi stage steam turbine with generator set (rear, red) A hydrogen-cooled turbo generator is a turbo generator with gaseous hydrogen as a coolant . Hydrogen-cooled turbo generators are designed to provide a low- drag atmosphere and cooling for single-shaft and combined-cycle applications in combination with steam turbines . [ 1 ]
A genset uses one to three small diesel engines to provide power. An operator is able to activate each engine as needed, with more than one engine gensets activating one for light work and activating more for heavier work, with excess engines turned off when the extra power is not needed.