Why does the rotor speed increase after load shedding?
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This post was last edited by gaodi913 on 2015-12-21 at 18:32. Why does the load drop? Why does the speed increase after load shedding?
Firstly, f = pn/60; the frequency is related to the rotational speed. When the generator is operating normally, the power of the prime mover corresponding to the valve opening degree of the generator is in balance with the output power of the generator, which is the electromagnetic power. This electromagnetic power serves as a braking effect. When the load on the unit is reduced, the balance is disrupted; at this point the power of the prime mover remains unchanged while the electromagnetic power drops rapidly to zero. As a result, the generator speeds up, leading to an increase in its rotational speed and ultimately an increase in frequency
When the steam turbine is shut down, the load must be reduced; however, the intake volume of air to the turbine cannot be decreased fast enough, which causes the speed of the unit to increase
If the pre-pressure control is automatically adjusted, how can there be a load shedding? Please ask an expert to explain