What is Voltage regulation: Definition and 23 Discussions

In electrical engineering, particularly power engineering, voltage regulation is a measure of change in the voltage magnitude between the sending and receiving end of a component, such as a transmission or distribution line. Voltage regulation describes the ability of a system to provide near constant voltage over a wide range of load conditions. The term may refer to a passive property that results in more or less voltage drop under various load conditions, or to the active intervention with devices for the specific purpose of adjusting voltage.

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  1. M

    Voltage regulation in transformers at unity power factor

    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...
  2. I

    How Can Voltage Regulation Be Achieved for a Sensitive 390V Chiller?

    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...
  3. N

    Transformer voltage regulation and calculations

    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...
  4. J

    Transformer Voltage Regulation

    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...
  5. C

    LDO voltage regulator stability

    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...
  6. K

    Electric Circuit With An Electric Motor - Satellite Project

    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...
  7. T

    Understanding Voltage Regulation in Transformers

    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...
  8. G

    Voltage Regulation - Transformer

    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...
  9. P

    Testing voltage regulation of MC7805 using active load

    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”...
  10. P

    Voltage Regulation for three phase Dzn Transformer

    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...
  11. H

    Voltage Regulation transformer

    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...
  12. P

    Voltage Regulation -- Transformer

    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...
  13. R

    Voltage Regulation and Loading

    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...
  14. I

    How can I build a precise voltage regulator for my Nokia N8 car charger?

    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...
  15. Q

    Negative Voltage Regulation in Transformer

    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...
  16. M

    Using Voltage Regulation to find load capacitance (Transformer)

    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...
  17. A

    Voltage Regulation: Ideas for Building Circuit

    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...
  18. R

    Regulate DC Voltage to Charge 12V Battery

    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...
  19. N

    Transformer Voltage Regulation and efficiency determination?

    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...
  20. L

    Voltage regulation using zener diode

    Homework Statement when zener diode is used for voltage regulation, voltage source is connected in series to zener diode and load resistance is connected parallel to zener diode. when zener diode is reverse biased, it will enter zener breakdown region. when input voltage increases zener...
  21. B

    Voltage regulation under a capacitive load.

    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 =...
  22. G

    Voltage Regulation: How to Calculate Reactive Power

    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?