0
What else can I help you with?
Is it possible to change the frequency in an electrical substation?
yes, it is possible to change the frequency in substations. frequency changer is a motor-generator set that changes power of an alternating current system from one frequency to one or more different frequencies, with or without a change in the number of phases, or in voltage. Sometimes a converter is used to accomplish this.
Why must the oncoming generator on a power system be parralleled at a higher frequency than that of the running system?
If the frequency of the oncoming generator is slightly higher than the system frequency, the phase angle between the system and generator voltages will slowly change at a frequency equal to the difference between system and generator frequencies.
What is the relationship between the speed of a generator and its voltage and the torque on the generator shaft and the current produced by the generator?
emf produced by generator(E)=no. of turns in coil*rate of change of magnetic flux
Frequency response curve of RC coupled amplifier?
at low frequency less than 50hz the voltage gain decreases with decreasing frequency and at mid frequency{50hz to 20khz} the voltage gain is uniform because resistor value are independent of frequency change and at the high frequency votage gain falls.
The basic function of a transformer is to change?
The basic function of a transformer is to change voltage levels.
How you can increase the generator terminal voltage when synchronise with other generators?
The whole idea of synchronization is that you DON'T change the voltage (or frequency) from the other generators.
What happens if input to a generator is increased where it is synchronised to a powergrid whose Mw is fixed?
When input to generator increased when it is synchronised, speed of alternator get disturbed which inturn leads to the change in frequency,when frequency gets change synchronization is no long.
Is it possible to change the frequency in an electrical substation?
yes, it is possible to change the frequency in substations. frequency changer is a motor-generator set that changes power of an alternating current system from one frequency to one or more different frequencies, with or without a change in the number of phases, or in voltage. Sometimes a converter is used to accomplish this.
How do you modify the frequency of an AC generator?
You change the speed of rotation.
Why must the oncoming generator on a power system be parralleled at a higher frequency than that of the running system?
If the frequency of the oncoming generator is slightly higher than the system frequency, the phase angle between the system and generator voltages will slowly change at a frequency equal to the difference between system and generator frequencies.
Why frequence do not change in transformer?
Voltage at secondary coil depends on differentiation of current at primary coil. In case of sinusoidal current, differentiation leads to sinusoid with same frequency, thus frequency does not change.
What is the function of the governor of a generator and how exactly is it different from the AVR?
Automatic voltage regulator (AVR) : Depends on the generator output voltage & out put current/Kvar it will change the exciter voltage. Change in excitation voltage controls the reactive power (Kvar). whereas, a Governor controls the fuel supply to primemover(Engine) in order to control the speed of generator, change in speed (rpm) also controls Active power (KW).
How do you change the speed of motor without change pole and frequency?
On an AC motor you basically vary the frequency on a DC you can vary the voltage.
What is the relationship between the speed of a generator and its voltage and the torque on the generator shaft and the current produced by the generator?
emf produced by generator(E)=no. of turns in coil*rate of change of magnetic flux
When frequency and voltage of an RC coupled amplifier are kept constant then what happens to the amplitude of output?
There is insufficient information in the question to answer it. Something has to change if you are asking what happens to amplitude, but you did not provide that "something". Please restate the question.
Does a step down converter also change the frequency?
No. It simply changes the voltage.
How does an induced voltage across a generator coil change during each revolution of the magnet?
sinusoidally
