Extremely useful. These simple facts are never written in any textbook in a simple manner as you explained in this video. I did study numerous books, but this 9 mints video made me clear. Thanks a lot for your service in disseminating your knowledge.
Also, reactive power is useful for induction generators that do not have an external excitation system like sync. generators. The presence of Q in the rotor and stator windings provides a magnetizing current that establishes the rotating magnetic field in the rotor. That rotating magnetic field cuts the stator coils, which induces a voltage (electromagnetic induction), that results in current flowing in the stator coils. The stator is connected to the grid so this product of current and voltage is the power delivered into the grid.
Thank you very much! I am trying to understand why, when I run a load flow simulation, the bus voltages are less than nominal without reactive power compensation and then why adding compensation props them back up. This was very useful!
Before watching this video, I know is useful for voltage control. You can control voltage by varying active or reactive power. However, active power is what consumers pay for, hence we choose to control voltage with reactive power. Another important fact is that you can use reactive power either for power factor compensation, or voltage control, but not for both
Very well explained.pls make videos on more topics. If possible try to make videos on basic components of electrical engineering. We go through books, we get the things but practically how it works that we don't know. You have made it clear wid the help of presentation. Thanx alot..
For any dc motor, if you model the field winding, then there is a winding resistance and an inductor which models the coil which produces the magnetic field. When a DC power source is connected to the field, think of DC power source and the winding as an RL circuit. Active power is I^2*R, and reactive power which is now converted as magnetic field is given by 0.5*L*I^2. I think this the formula. Active Power and Reactive Power are basically AC concepts. Applying them to DC is technically not correct. But this is an explanation based on those lines.
Thank you sir,Actually it's a final viva question to me in my B.tech final project. I answered to this question briefly but here I got full information.thank u so much😊😍
When you overcompensate reactive power locally by using FACTS devices or shunt capacitors in a transmission or distribution system, it does the same effect as the (Ferranti effect), so to speak, where voltage can increase beyond grid code requirement (voltage instability). If from the generation side, where a synchronous generator is overexcited (i.e., injection of reactive power into the grid), it can cause overloading of lines or transformers because P & Q can compete to flow in a specified line (with limited line flow limits), which can largely reduce efficiency. That is why the power factor is usually monitored to understand the P-Q ratio. The flow of a large amount of Q will incur more reactive losses thus, results in voltage drops. You will realize here that I said earlier the injection of Q increases voltage, and now, I'm saying the flow of Q reduces voltage. YES! That is because Q is usually compensated locally and is not allowed to flow in the grid, although a minimal amount can flow as injected by synchronous generators - that means the exact amount of Q required must be compensated or provided locally to avoid overloading or voltage issues. Generally, in power systems, we can't say one thing that can be seen as a fixed solution, but it changes depending on the application.
Reactive power is imaginary. And imaginary power is useful only in simplfying the calculations. Trying to understand what reactive power is same as trying to understand what sqrt(-1) is.
"Imaginary" doesn't literally mean that it doesn't exist, it means it is a vector quantity, having a magnitude that exists in a time domain. If inductive or capacitive reactance was "imaginary" then we wouldn't have to compensate for it.
Extremely useful. These simple facts are never written in any textbook in a simple manner as you explained in this video. I did study numerous books, but this 9 mints video made me clear. Thanks a lot for your service in disseminating your knowledge.
Also, reactive power is useful for induction generators that do not have an external excitation system like sync. generators. The presence of Q in the rotor and stator windings provides a magnetizing current that establishes the rotating magnetic field in the rotor. That rotating magnetic field cuts the stator coils, which induces a voltage (electromagnetic induction), that results in current flowing in the stator coils. The stator is connected to the grid so this product of current and voltage is the power delivered into the grid.
Thank you very much! I am trying to understand why, when I run a load flow simulation, the bus voltages are less than nominal without reactive power compensation and then why adding compensation props them back up. This was very useful!
I now understand that there is leading AND lagging reactive power. This use to confuse me. Great video and explanations- thank you!!
Before watching this video, I know is useful for voltage control. You can control voltage by varying active or reactive power. However, active power is what consumers pay for, hence we choose to control voltage with reactive power. Another important fact is that you can use reactive power either for power factor compensation, or voltage control, but not for both
How reactive power produces magnetic field
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Finally a satisfactory explanation of this topic!!! Thank you very much :)
Glad it was helpful!
Very well explained.pls make videos on more topics. If possible try to make videos on basic components of electrical engineering. We go through books, we get the things but practically how it works that we don't know. You have made it clear wid the help of presentation. Thanx alot..
Sure. Thanks
Good
Thanks
Great video
Please, make video on induction generator working principle.
Sure, Tasnim. We will make it soon.
Thank you
Beautiful explanation
is it possible to convert the reactive power to real power and if yes how ?
motor,ThenGenerator.
No it is not.. reactive power is also known as imaginary power.
Nicely explained..
Thanks,Aadil. Have you watched other videos in our channel,? We appreciate your feedback.
How does dc motor field gets energized since supply is dc voltage and thereby no reactive power????
For any dc motor, if you model the field winding, then there is a winding resistance and an inductor which models the coil which produces the magnetic field. When a DC power source is connected to the field, think of DC power source and the winding as an RL circuit. Active power is I^2*R, and reactive power which is now converted as magnetic field is given by 0.5*L*I^2. I think this the formula. Active Power and Reactive Power are basically AC concepts. Applying them to DC is technically not correct. But this is an explanation based on those lines.
A current carrying conductor produces magnetic field around it. I think Reactive power is not needed to produce field.
@insearchofpeace2151 It's not the coil that produces magnetic field. Any conductor which carries current produces field.
Thank you sir,Actually it's a final viva question to me in my B.tech final project. I answered to this question briefly but here I got full information.thank u so much😊😍
Hi Chandana, Glad to know that it helped you.
Well explained and thanks
Glad it was helpful!
What happen to the grid if supply more reactive poWer?
When you overcompensate reactive power locally by using FACTS devices or shunt capacitors in a transmission or distribution system, it does the same effect as the (Ferranti effect), so to speak, where voltage can increase beyond grid code requirement (voltage instability). If from the generation side, where a synchronous generator is overexcited (i.e., injection of reactive power into the grid), it can cause overloading of lines or transformers because P & Q can compete to flow in a specified line (with limited line flow limits), which can largely reduce efficiency. That is why the power factor is usually monitored to understand the P-Q ratio. The flow of a large amount of Q will incur more reactive losses thus, results in voltage drops. You will realize here that I said earlier the injection of Q increases voltage, and now, I'm saying the flow of Q reduces voltage. YES! That is because Q is usually compensated locally and is not allowed to flow in the grid, although a minimal amount can flow as injected by synchronous generators - that means the exact amount of Q required must be compensated or provided locally to avoid overloading or voltage issues. Generally, in power systems, we can't say one thing that can be seen as a fixed solution, but it changes depending on the application.
0:15 Basic question??? Perhaps for you it is, but not for many of your viewers. It doesn't sound very sympathetic to me.
Helpful..
Thank you
You are welcome
I want ppt for this subject
Well explained.😀
Glad you liked it
Upload more videos sir
Will upload soon
Reactive power is imaginary. And imaginary power is useful only in simplfying the calculations.
Trying to understand what reactive power is same as trying to understand what sqrt(-1) is.
Watch this video fully
"Imaginary" doesn't literally mean that it doesn't exist, it means it is a vector quantity, having a magnitude that exists in a time domain. If inductive or capacitive reactance was "imaginary" then we wouldn't have to compensate for it.
Thanks sir
All the best
👍
Thank you sir 🙏😊
Thank you sir your explanation from basics are very good
thanks
Thanks to you too.😊
👍👍👍👍👍👍😄😄
PPT sir yes
Pl correct spelling of field
Yes
Please send
Too bad explanation...
I haven't seen this kind of worse explanation