Voltage regulation Definition and 22 Threads

So I've done part a) Primary current = 200000/415=481.9 Cos θ = -0.8 Sin θ = 0.6 Reg=(481.9 ( 0.014*-0.8 + 0.057*0.6))/415 = 0.0267 Reg% = 2.67% Part b I simply used the same equation but for secondary: @ unity p.f., cos θ =1, sin θ = 0 secondary current = 200000/11000 = 18.18...

Hello, I have a problem with chiller. The chiller is connected on 400V AC (+-10%) substation. But, at the end of transmission line, on my chiller terminals, I have 410V, my chiller has Un=390V, so the chiller has often breakdown, probably the electronics are so sensitive...do you have any idea...

This particular question is for an assignment. However, I believe that I have the final (correct) answer, but want to check the understanding. I am required to calculate the resistance of the secondary winding of a transformer. The transformer is a 415:11000 V step-up, rated at 200kVA but with...

Hi, I want to calculate voltage regulation of a transfromer. I have learned that voltage regulation is (Vnl-Vfl)/Vfl. While solving some problems for practice I came across multiple questions. In some of them where the load is given I understand how to solve them. I just find the No load...

I haven't done any Bode plots before, and so I'm reading about LDO stability and I came across this file, which I am trying to understand: http://www.ti.com/lit/an/slyt194/slyt194.pdf Under the stability analysis, it names the poles and zeroes. How are these calculated? I assume that the...

I am a software engineering major, and I am having some trouble with an electric circuit in my satellite project. Basically I am trying to generate 1G on the inner surface of a cylinder with a radius of 0.03m, connected to an electric motor which has to rotate at about 173 rpm (to generate 1G...

Hi, So I have been told on here that when you eliminate the leakage flux between coils it improves Voltage regulation, I have also read online that voltage regulation is related to inductance, but could anyone elaborate on these? 'why are these so?' [I can sort of guess something like the...

Homework Statement A 415V to 11 kV transformer has a rating of 200 kVA. The winding resistance and leakage reactance when referred to the primary are 0.014 Ω and 0.057 Ω respectively. (b) In designing a particular 415V to 11 kV, 200 kVA transformer, the primary winding resistance is to be 10...

Homework Statement The attachment depicts an active load (to the right is the equivalent circuit). It is called thus because this load (measured from TP27) changes its resistance according to the controlling signal connected to TP25. The load is switched “on” (minimum resistance) and “off”...

Hi, I need to calculate the voltage regulation of the 3 ph Dzn transformer. I have knowledge of the current going into the primary winding of the transformer (Delta winding) and hence need to calculate the current in the secondary (load current) so that I can use this in the voltage...

Homework Statement 5. A 415V to 11 kV transformer has a rating of 200 kVA. The winding resistance and leakage reactance when referred to the primary are 0.014 Ω and 0.057 Ω respectively. (a) Determine the % regulation of the transformer at 0.8 power factor lagging. (b) In designing a...

Homework Statement 5. A 415V to 11 kV transformer has a rating of 200 kVA. The winding resistance and leakage reactance when referred to the primary are 0.014 Ω and 0.057 Ω respectively. (a) Determine the % regulation of the transformer at 0.8 power factor lagging. (b) In designing a...

Good evening everyone. I have two questions to ask you guys. 1. Why voltage regulation of a synchronous motor is negative with a purely capacitive load? I mean why? 2. Why Reactive loss is higher than resistive loss in a power distribution line? thank you and have a nice day...

I have a nokia N8 cell phone and it is very precise about what it will allow to charge it. Mostly it will only accept wall chargers, not car power in any way. There is no way it knows the car charger isn't in the wall so all I can guess is the power is "dirty" and therefore it denies it. My...

How can a transformer have negative voltage regulation? A few texts state that a leading power factor can give rise to negative power factor, but I have not been able to figure out how this is possible. One vague explanation in my mind is that capacitance across the secondary terminal will...

Hi, I did an experiment, involving transformers. Where we did open circuit and short circuit tests then test with a resistor, capacitor and inductor. For the last question it asks Calculate the load capacitance and inductance from the voltage regulation readings. Voltage regulation...

Good day all! I am new to this forum however i hear its great and full of good engineers. I want to convert 90-270 volts into either 88 volts or 112. I was thinking about a buck converter due to the efficiency however i cannot find one that can take my vin min and vin max. Then i though of a...

Ok, so I have a variable DC voltage source that changes as due to outside factors. The voltage ranges between 9 and 18 volts with a current between 1 and 3 amps. I want the voltage source to charge a 12 volt battery continuously until it is full. Whent he battery is full, the circuit should shut...

A transformer is rated at 2300/230 V, 15 kVA and 50 Hz. Assume that the transformer is operating at 80% p.f., leading and at rated output the secondary terminal voltage is 230 V. The following parameters for the transformer are given: N1 = 1500 turns N2 = 150 turns r1 = 2.7 ohms r2 = 0.024...

Homework Statement Why does the voltage regulation of a transformer become negative when a capacitive load is attached? It causes the voltage across the secondary winding to increases rather than decrease, as would be the case for a resistive load. But why? Homework Equations Regulation =...

I a question: 1. How does voltage regulation works? I was told that if we set the value of the capacitor so that it supplies one-half of the reactive power absorbed by the line we will get a perfect voltage regulation. Anyone knows how to come up with the equation?