Recent content by cnh1995

I think the diagram is provided along with the problem statement and the OP is asked to develop its control-system block diagram from this.

Can you upload your attempt at a solution?

R1 is not considered and R1 is 1kohm?

Yes, for someone with no/little scientific background, his choice of words and expressions would most likely imply energy is transported through wires, which is misleading.

Yes that is what I thought. Also when he freaked out about "standing in the way of energy flowing through air to power a lightbulb" , I thought of birds chilling on a high voltage transmission line conductor. When birds stand on a high power conductor, some energy must be flowing through their...

I came across this video where Dr. Tyson talks about Nikola Tesla. Neil Tyson on Tesla. From 4:47 onwards, he says "We now send energy through wires", and talks about how bizarre it would be to walk around/stand in the way of such energy flow. Further he says the power transmission lines are...

Yes. Both T1 and the generator have the same voltage rating(and are at the same voltage level in the line diagram). This is why only the ratio of MVA ratings is used to find the new pu reactance. The MVA rating of T2 is same as the base MVA (300MVA). The 0.1 pu reactance of T2 is w.r.t its own...

In a stand alone generator, increasing field current or generator torque will change the terminal voltage and speed. Any changes in load impedance and load power factor will also affect terminal voltage and frequency. But I do not have much information on how the terminal voltage and frequency...

Not necessarily. Torque in a rotating machine is produced by the interaction of the stator and rotor magnetic fields. If you look up the torque equation in terms of the fields, the electromagnetic torque produced is proportional to the product of field strengths but more importantly, it is also...

If you increase the steam input with the intention of running the generator faster, the rotor will accelerate momantarily, but the infinite bus will force it to resume the synchronous speed after a transient period of damped oscillations (which depends on many factors like machine inertia...

See the diagram attached in #19. When analysing things from the machine side, the machine is assumed to be connected to an infinite bus. The voltage, phase angle and frequency of the infinte bus are fixed. It is an ideal bus whose voltage, frequency and phase angles cannot be changed by...

Electromagnetic torque is the torque produced by the interaction of the armature flux and the rotor flux. This torque opposes the rotor rotation in a generator. In steady state, the electromagnetic torque is equal and opposite to the prime mover torque (electromechanical energy conversion...

I was explaining this scenario. The generator is connected to the infinite bus through its synchronous reactance alone. There is no transmission line. So the terminal voltage is same as the infinite bus voltage.

A change in the field current changes the rotor angle w.r.t. the angle of the terminal voltage. The magnitude and phase angle of the terminal voltage are fixed (by the grid). You must have seen the phasor diagram of this scenario in your notes/textbook. Consider the following two cases: 1) The...

Field loss is not relevant in this problem as the motor is separately excited, and you are asked about the output power. The field loss component of the current does not flow through armature and is irrelevant here unless you want to calculate the efficiency (and if the field resistance was...