Principles of Symmetrical Components Part 1a
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- Опубліковано 8 вер 2024
- 🚀𝐀𝐋𝐋 𝐈𝐍 𝐎𝐍𝐄: 𝐏𝐨𝐰𝐞𝐫 𝐒𝐲𝐬𝐭𝐞𝐦 𝐁𝐮𝐧𝐝𝐥𝐞!🚀
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In this series, we intuitively describe what symmetrical components are, the value of symmetrical components, where we use them, and how we use them to set relays and breakers.
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You've saved me my friend! Unfortunately, we do not have a good literature about that in Portuguese. It's been so helpful for electrical engineering students in Brazil. I'm pretty pretty thankful! Congrats for this!
Hi Gabriel, we're thrilled to hear that our content has been helpful for you and other electrical engineering students in Brazil. It's always a great feeling to know that our work is making a positive impact in the world.
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such a lightbulb moment, thank you!
Thank you so much for these amazing videos. They have helped me enormously. I am a graduate student studying Power Systems and your amazingly descriptive videos have made a huge difference for me. Thank you again and please please please keep up the good work. I would also really appreciate it if you would do a series on Fault Analysis.
Clear Cut Explanation sir
New subscriber added to your channel from INDIA ❣️
We are glad you enjoyed the video. You might also be interested in our latest Power Systems Engineering VLOG series. Get started with a 30-Days FREE-TRIAL here: bit.ly/PSEVlog
Brilliantly explained....thnq so very much....no one tries ti explain it in a intuitive manner but i thnq for making this video...
Thank you for the valuable feedback! 😊 For more intuitive content join us at www.patreon.com/generalpac
dude i saw your videos, and it worth more than i’ve received in my 4 years study. thanks a lot!
Thank you for your appreciation. Knowing that our videos were helpful to you is indeed satisfying. :)
Excellent presentation for a industrial electrician to understand thanx!
Such a concise & really great explaination. Watching this, college lectures make more sense.
One topic was missing, about Z bus Calculation, about Z bus building algorithm, Current Injection Method etc.
But no issues I understood those topics from somewhere else, but If You'll make playlist for this also, this will help everybody.
Thanks
Hi, your suggestion has been noted. Checkout our new course which covers a variety of Power Systems concepts with detailed explanation and we're offering 90% OFF. Use the coupon code "PSEVLOG1" and get benefit from it: bit.ly/PSEVlog1
Hey you guys, thanks for the feedback. For all our upcoming videos we won't add any music. Unfortunately, UA-cam doesn't allow us to remove the music from previously uploaded videos. Thank you for your understanding.
-GeneralPAC team
I'm prepared to make a one-off donation. Do you have a paypal link?
Link for one-off donation is appreciated
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@@lixiangabcd11 You can provide a one-off donation by purchasing our Power System Protection Fundamental Course at gpac.link/3rTcJ9K. Your support truly makes all the difference.
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great tutorial set!! only thing the background music was a bit loud and haunting making it a bit difficult for me to follow. other than that, thank you so much for the excellent course.
yo im studying for my state exam. Thank you so much for the easy explanation.
You're most welcome
Great job! Such a great video series for this concept!
I'm eagerly looking forward to your next videos and hope to see it asap.
Wonderful explanation. Although there are many videos out there on the topic, most of them tries to achieve mathematical accuracy, rather than explaining the "why" / application aspect. I like the sequence of your explanation. Kudos.
Thank you Harsha for your kind words. Glad to know that you liked our videos. :)
Hi..what about remaining series..eagerly waiting for them..please post asap.
very nice!! thank you sir!!!!
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awesome video 👍👌
Very useful
Oh man ! Enjoyed learning., Simple and sharp lecture, god bless you...keep going
Very well explained sir!!
Thank you for the appreciation! 😊 Stay tuned for more!
Thank you
Very good... Need details explanation of different electrical machine..
I have watch all the videos related to symmetrical components. To appreciate it more, do you have another set of videos on how can i apply it on actual electrical system design where the only given is utility available fault current and system impedances. Even a book or technical paper will be much appreciated. Thank you and hope to hear from you soon.
We are working on this series now and hope to release it soon!
Hey there! We have started a new series which is the Fault Analysis using Waveforms. It is basically the practical implementation of the symmetrical components and faults. Check it out at: www.patreon.com/posts/24990064
Can you please make a video on distance relays, specially quadrilateral ones?
+wy911 Soon my friend! Please visit generalpac.com/ to keep updated! Thanks!
Best video ever
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LOVED YOU!
Nicely explained the theory i qould recommend to my friends to visit.
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Great explanation.
Awesome explanation 👍
Thank you :)
Very nice
this is soo comprihensive...
thankss
love it mate. Will do your course.
Thank you :) You can have a look at our courses here: www.allumiax.com/power-system-courses
Awesome 👍 but please kindly lower the music 🙏
Thank you man God bless you!!
excellent
Great presentation,,,
Salam . Nice vedio i am proud of you. Thanks
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The content really is well delivered but I found the background music to be quite distracting and unecessary tbh.
Thanx
Thanks man for good work :)
3 SEMESTER I tried to understand symmetrical components and I still don't get it. I just use the formula to answer exam. But, after watched this video I understand why we need symmetrical components. thanks a lot.
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sharing is caring , well done
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I would like to put a question what if the fault occurs before the distribution transformer or you can say at the sending end?
Dear sir i have a question in my mind will you please help me?
que : I've read this line in one book related to switch gear and protection which says as follows :-
the unbalanced loading results in circulation of negative sequence currents in the stator winding which give rise to rotating magnetic field which rotates at double the synchronous speed with respect to rotor and induces voltage double the frequency in rotor conductor.
Can you explain this in more elaborate way.
Thanks in advance.
Top video
0:17 MANNN you can say that 100 more times........... Thanks a lot
Well explained ❤but the bgm is little bit disturbing
Hi Megha, Thank you for the feedback. For all our upcoming videos we won't add any music. Unfortunately, UA-cam doesn't allow us to remove the music from previously uploaded videos. Thank you for your understanding.
-Team GeneralPAC by AllumiaX
Hi , I i like your lecture. Thanks
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Good job
I love you man
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vrei good excellent
what whiteboard app do you use?
It's comPOnent, with the emphasis on PO, rather than COMponent as you're saying it.
Hi Russell, can you please elaborate?
@@Generalpac Just how you're saying the word. You're putting the stress on the first syllable when it's normally on the second.
What is the sense of background music in this video?
+Aayush Godara we are considering removing the background music on future tutorials as we have received mixed reviews about it.
Then didn't they calculate unbalanced faults before symmetrical component theory? It is really bothering me.
When you say analysis is extremely difficult to attempt to calculate unbalanced faults without symmetrical components, what do you mean? The alternative to symmetrical components would be deriving the KVL/KCL, Mesh/Node equations for the 3 phase network. This doesn't sound "extremely difficult" as much as it is just going to be a long and tedious process. Can you clarify? Thanks.
After performing the KVL/KCL methods, we determine the equivalent impedance and voltage source. Then, we have to use that information in a very specific way to calculate 3LG, 1LG, 2LG, and LL faults. For 1LG, the impedance are in series. for LL faults, they are in parallel. This part wasn't known BEFORE the symmetrical components was invented in 1918. Actually, couple years after 1918, Power Engineers were able to use the symmetrical components concepts to calculate unbalance faults. Does that make sense?
Also -- If I understand it correctly (and challenge or add to this comment) -- back in the day (before main-frame computers), Engineers from the past created a miniature version of the system using simple cables and small transformers. They were very careful of the impedance used for the mini system because it had to accurately reflect the big system. And when they injected current through the mini system, they could easily measure the current flow through each line which would reflect how currents would distribute through the actual system. Similarly, I think they had a crude way to measure unbalance fault currents. That's all I know. If I find out more, i'll comment again.
Im not sure by what you mean by "determine equivalent impedance and voltage source. Then we have to use that information in a very specific way...", or "This part wasn't known BEFORE the symmetrical components was invented in 1918". The way I see it, to calculate unbalanced faults without symmetrical components, all you have to do is derive the KVL/KCL mesh/node equations with the desired fault topology, then solve the resultant system of equations for the unbalanced voltages/currents. As I initially stated, this is not "extremely difficult" as much as it is a long and tedious process.
Using KVL/KCL mesh/node equations that you have described can be used to calculated balanced 3PH faults. But not unbalanced faults. Read this paper for more info. Figure 3, 4, and 5 shows what how the "equivalent impedance" and "voltage source" for pos, neg, and zero sequence impedance are arranged to calculate unbalanced faults (1LG, 2LG, and LL).
cdn.selinc.com/assets/Literature/Publications/White%20Papers/LWP0010-01_TutorialSymmetrical-Pt1_AR_20130422.pdf?v=20150812-081134
Hope this helps.
Thanks for your responses. I have actually read that SEL paper in the past, its good but unfortunately its not what I would like to clarify. I feel like I have a good grasp on this subject, but the only thing that concerns me is something you said.
I disagree with your statement about, "Using KVL/KCL mesh/node equations... can be used to calculated balanced 3PH faults. But not unbalanced faults." as it is generally incorrect. You mention that it is extremely difficult to attempt to calculate unbalanced faults without symmetrical components, and now it sounds like you are saying that its not possible at all using KVL/KCL. This is adding to the confusion about my initial inquiry.
The way I understand it, there are a few ways to analyze unbalanced faults..... I will categorize them into two parts.
1.) Symmetrical Components: This is just a way to break apart the unbalanced phasors, and deal with them as balanced phase sets, which makes analysis much easier since we are dealing with per-phase equivalent circuits as you have mentioned (pos, neg, zero). With these symmetrical phase sets and their respective impedance networks, any circuit analysis techniques/methods may THEN be applied, such as KVL/KCL Mesh/Node equations, source transforms, thevenin/norton transforms, lumped/reduction of elements etc.... Note: Depending on the fault topology under consideration, the impedance network is manipulated/arranged accordingly to calculate the unbalanced faults. The sum of symmetrical components gives the resultant unbalanced conditions. This is very convenient.
2.) Non-Symmetrical Components: This is directly applying brute force circuit analysis techniques/methods such as KVL/KCL Mesh/Node equations, source transforms, thevenin/norton transforms, lumped/reduction of elements etc.... to the THREE-PHASE topology (not per phase equivalent circuits) with the desired fault in-place - whether it be 1LG, 2LG, LL, etc.... Eventually, you will have a characteristic set of mesh/node equations that, once solved for, will give the resultant unbalanced phase conditions for the particular 1LG, 2LG, LL fault. This analysis of unbalanced faults is more tedious, and requires a new set of equations for each type of fault. Its not extremely difficult, and therefore it IS possible to analyze unbalanced faults without symmetrical components. It may or may not be convenient.
My apologies for the confusion. You raise a good question and like you, I don't have all the answers... but I am curious! I also want to learn how unbalanced faults were calculated BEFORE the introduction to symmetrical components. I know for sure that we can use "KVL/KCL Mesh/Node equations, source transforms, thevenin/norton transforms, lumped/reduction of elements etc" to calculate 3PH faults. However, i'm not confident about using these techniques to calculate UNBALANCE faults. I hear you... this is where we disagree. Your carefully written thoughts and explanation is much appreciated! It helped me understand where you were coming from! So thank you for that!
With that given said, I'll do some digging. When I learn something new, I'll post it here :) Also, if you come across a good article / book / standard that explains this concept in more detail, please do comment.
thanks for excellent tutorial.
I have problem with calculating negative current sequence of a delta svc, I'm reading a paper related to this topic and the formula of negative sequence do not make sense to me, anyone can help?
Hi Morteza, calculating negative sequence current is highly dependent on the application in question. The way it was presented in this video was for a very particular application (ABC Phase Sequence, CCW Rotation, etc). You'll need to look carefully with the application in question and adjust accordingly. I hope his helps.
Morteza, we request that you become our donor on Patreon.com/generalPAC to get exclusive behind the scene content, voting rights, webinars, Q/A sessions, and more perk. The reality is very simple; we need your financial support to continue making awesome video tutorial. So become our patron and we can’t wait to meet you the other side :)
sir plzz i want complete description of positive,negative and zero sequence components
iam waiting for ur rply sir..
I'm confident your question will be answered if you watch and note each video in this series: ua-cam.com/video/iLOfLIHLaqs/v-deo.html
good video
+Harinder Sawhney Thank you sir! Please checkout generalpac.com/forum/ to ask specific technical questions. Thanks!
he sounds like Ross Geller from friends
1-that music is annoying.
2-Excellently explained
3-Thank you!
Thank you for the valuable feedback! 😊 We have removed the background music in our latest videos. Check them out at www.patreon.com/generalpac
@@Generalpac thank you!
where can I find part 1b?
In development :)
+abel nanez signup on our mailing list at generalpac.com to get notified when the latest video tutorials are released!
very nice video but i havent slept in a few days and the music was very risky. every time i blink i have a +-60% chance of my eyes not opening afterwards. i still think this video will be useful in helping me get at least one mark on my mid-semester exam in 2 hours from now. please someone send help my degree is going to be the end of me
Sorry to hear this... The intention of the music was not to make the audience fall asleep lol
im on part 3c now im skimming over it super quickly. thanks for uploading these videos even though im very sure i will have to repeat energy systems 244 again next year lol
Hi, Daniel thank you for your kind comments. Now, we have removed the background music from all our latest videos. You can check out our latest series on "Fault analysis in Power Systems" on the GeneralPAC UA-cam channel.
👍
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Why would you include music while you are talking....
I would really, really rather skip the music. I don't hear well and the music makes it harder.
the background music isnt helping at all.
Hi Caleb, For all our upcoming videos we won't add any music. Unfortunately, UA-cam doesn't allow us to remove the music from previously uploaded videos. Thank you for your understanding.
-GeneralPAC team
Would be good if I could only HEAR over the music. WHY? WHAT ARE YOU THINKING It's stupidly loud and distracting
I know I know... I was experimenting and learned my lesson as a result
Please don't add music to your videos or if you do keep it much lower volume than than your talking.
Thanks for the feedback. For all our upcoming videos we won't add any music. Unfortunately, UA-cam doesn't allow us to remove the music from previously uploaded videos. Thank you for your understanding.
-GeneralPAC team
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