- 9
- 67 834
Build From Basics
เข้าร่วมเมื่อ 26 มี.ค. 2020
"Build from Basics" is an useful TH-cam channel/video tutorial for all those aspiring engineers (Electrical & Electronics), physicists and to those who are interested in this field.
The main motto of the upcoming videos are to help students, engineers and like minded people to learn technical topics through short and simplified tutorials by two experts in the field, Dr. Jayachandra Naidu Sakamuri and Dr. Anirudh Acharya.
Dr. Anirudh Acharya is a PhD in Electrical Engineering from Norwegian University of Science and Technology - NTNU. He holds a Master of Science in Electrical Engineering from Indian Institute of Science, Bangalore in 2011. He has also worked as a Scientist at ABB HVDC in India and Sweden for several years.
Dr. Jayachandra N.Sakamuri is a PhD in wind energy engineering from the Technical University of Denmark He was awarded the “Excellent Young Wind Doctor” from EAWE for his PhD. He holds Masters from IIT Kanpur, India and has several years of research experience.
The main motto of the upcoming videos are to help students, engineers and like minded people to learn technical topics through short and simplified tutorials by two experts in the field, Dr. Jayachandra Naidu Sakamuri and Dr. Anirudh Acharya.
Dr. Anirudh Acharya is a PhD in Electrical Engineering from Norwegian University of Science and Technology - NTNU. He holds a Master of Science in Electrical Engineering from Indian Institute of Science, Bangalore in 2011. He has also worked as a Scientist at ABB HVDC in India and Sweden for several years.
Dr. Jayachandra N.Sakamuri is a PhD in wind energy engineering from the Technical University of Denmark He was awarded the “Excellent Young Wind Doctor” from EAWE for his PhD. He holds Masters from IIT Kanpur, India and has several years of research experience.
Solar Power: The advantages of PV solar energy
The power extracted from solar photovoltaic system is compared with other popular renewable and non-renewable methods of power generation. A qualitative argument is presented in terms of scalability, modularity and abundance of resource for solar photovoltaic power. At the end of this video you will understand the importance of solar photovoltaics power generation and why it is gaining significant attention.
มุมมอง: 179
วีดีโอ
What is the Role of the Substation in Electrical Power System ? || Substation Main Functions
มุมมอง 1.4K4 ปีที่แล้ว
What is the Role of the Substation in Electrical Power System ? Substation Main Functions Why do We Need Electrical Power Substations ? The electrical power system is composed of generation, transmission, and distribution systems. The generating stations generate or produce electrical power. The transmission system transmits or send this produced electricity to overlong distances until it reach...
Overview of Resistance, Inductance, and Capacitance | Current, Voltage, and Power Relationship
มุมมอง 8844 ปีที่แล้ว
This video presents overview of Basic circuit elements; Resistor, Inductor and Capacitor, mainly the relationship between voltage, current and power. The pure resistor only consume active power. The active power is the multiplication of RMS voltage, current and cosine of angle between them. The reactive power is the multiplication of RMS voltage, current and sine of angle between them. As the a...
Why Transformer Rated In kVA, Not in kW? | How are transformers rated?
มุมมอง 6874 ปีที่แล้ว
Why Cant Transformers and AC generators be rated in watts (W)or kilo watts (kW) or mega watts (MW). And why they should be rated in volt ampere (VA) or kilo volt ampere (kVA) or mega volt ampere (MVA) ? The main reason is, the capacity of the transformer is limited by two factors 1. the current that the transformer winding can carry and 2. the voltage it is designed to work without satuation. I...
Why Motor is rated in kW while transformer rating is in kVA ?| Why motor is rated in kw not in kVA ?
มุมมอง 8324 ปีที่แล้ว
Why Motor is rated in kW while transformer rated in kVA ? | why motor is rated in kw not in kVA ? Why Motor rated in kW/Horsepower instead of kVA? In case of motors, the customer is more interested on the amount of load it can drive to decide which motor is suitable to meet their purpose. Therefore, Electric motor rating is given in terms of shaft power. The shaft power is the measure of capaci...
Capacitor | Why does current leads voltage in a capacitor ?
มุมมอง 3.2K4 ปีที่แล้ว
Why current leads the voltage in a capacitor ? |Does current lead or lag voltage in a capacitor? The current in the pure capacitor leads the voltage by 90 degrees. You know the capacitor is nothing but two conductors separated by a dielectric medium. When a capacitor is connected across a voltage source, the voltage doesn’t build up instantaneously. The capacitor starts charging slowly by takin...
Why does current lags behind voltage in an Inductor ?
มุมมอง 1.9K4 ปีที่แล้ว
The current in the pure Inductor lags the voltage across it by 90 degrees. When a time varying voltage (for example, a sine wave) applied across a pure inductor , an opposing voltage called “back” emf is produced by the inductor due to its self-inductance. This back emf opposes and limits the current flowing in the inductor. Therefore, current through the inductor cannot follow the voltage acro...
Why Transformers and AC Generators are rated in kVA instead of kW ?
มุมมอง 2.7K4 ปีที่แล้ว
Why Transformers and AC Generators are rated in kVA instead of kW ? You all know that motors rating is in kW or HP. If a motor can be rated in W or kW or MW then why transformers and AC generators should be rated in volt ampere or kilo volt ampere or mega volt ampere ? Motors In case of motors, the customer is more interested on the amount of load it can drive to decide which motor is suitable ...
Why Reactive Power is Necessary ? | The Best Explanation | What is Reactive Power ?
มุมมอง 56K4 ปีที่แล้ว
Why Reactive Power is Necessary ? | The Best Explanation | What is Reactive Power ? Is Reactive Power Useless ? | What is Reactive Power ? | Reactive Power Compensation The Engineering and Science students find hard time to understand the concept of Reactive Power in Electrical Power System? Many say, Reactive power is useless power as it does not contribute to any real work. Considering the in...
You get a new subscriber. ❤
I want ppt for this subject
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.
Hey! Thank you for this video. Subscribed.
👍👍👍👍👍👍😄😄
How reactive power produces magnetic field
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
Pl correct spelling of field
PPT sir yes
I now understand that there is leading AND lagging reactive power. This use to confuse me. Great video and explanations- thank you!!
You are the only Indian who can produce a useful video in English, congratulations! I can't stop subscribe
Too bad explanation... I haven't seen this kind of worse explanation
👍
Yes
0:15 Basic question??? Perhaps for you it is, but not for many of your viewers. It doesn't sound very sympathetic to me.
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.
is the induced back emf goes to maximum point instantly, i mean when the switch is on? and then decrease with increasing flux?in case of DC supply.
👍
Great video
Beautiful explanation
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.
yes engabdjatto@gmail.com
Yes, wondmnewsisay07@gmail.com
ronaksingh327@gmail.com
Yes ajl1994@jntuh.ac.in
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 would like to get ppt. jprout123@yahoo.com
Yes Bommireddysaiavinash@gmail.com
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.
Thank you sir 🙏😊
Thank you sir your explanation from basics are very good
Finally a satisfactory explanation of this topic!!! Thank you very much :)
Glad it was helpful!
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.
Yes; george.prothasis@gmail.com
Good
Thanks
Helpful.. Thank you
You are welcome
Thanks sir
All the best
Yes shivrajverma241@gmail.com
Well explained and thanks
Glad it was helpful!
Capacitor draws a leading current amte meaning emi t sir , draws ane word ki meaning emi t capacitor sense lo ?
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
Yes shrutiichauhan@gmail.com
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.
Yes krushnachandranaik@gmail.com
YES. mark.reyns@siemens.com
Yes. studentmadan@gmail.com
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.
wonse.son@snsys.net
Yes. ayyagar178@gmail.com
Please, make video on induction generator working principle.
Sure, Tasnim. We will make it soon.
Thank you