Sequence Networks of Power System Elements | Part 2 of 3

[@DrAfrozAlam]

Download Fault Analysis handwritten lecture notes (pdf) using the following links: drive.google.com/file/d/18Zvgdi3YD6iAIkWJwz5-s7dVHRgM6lwZ/view?usp=sharing drive.google.com/file/d/1sfMf8BDsZ1BlKoehLLkokwizgtWHIbrr/view?usp=sharing drive.google.com/file/d/1eYOtrSzN7VwsqiLwjnrJ79BQd2LcE_Vy/view?usp=sharing

[@mcmanus4859]

Your lectures have been helpful. Much love from Kenya, Africa.

[@neminathnarule2257]

No words for this explanation👏👏👌👌🙏...

[@miguelsmoreira88]

Brilliant lecture Professor. Thank you very much for the high quality lessons that you've made available.

[@Humourtable]

Sir, I am studying Masters's in Italy and the way you explained the topics, I am thankful for that and clear the subject with a good score, thanks a lot sir, and for the subject.

[@priyanshusingh9167]

best teacher in the word sir you made power system easy for me thanks alot sir❣

[@nayeemshekh5414]

Dear @Dr. Afroz Alam, please accept heartfelt gratitude and salutation from Bangladesh for your such great initiative 💯/💯

[@DrAfrozAlam]

Thank you

[@kasunwijesinghe5365]

Amazing teaching skills ❤🎉

[@thinkwithimtiaz]

Thanks a lot, sir.....Love from Bangladesh...

[@charlenewong6763]

Thank you very much sir. Your lectures were really helpful during this quarantine period. I was able to understand my lessons through your videos

[@amritjotsingh6949]

Sir, Your Explanation is too good. 👌👌👌

[@puzzlepanic7151]

love you from walapane nildandahinna

[@jeetsethia1565]

Thank you so much sir . Best explanation i found on this topic !

[@cricketmastera.k2917]

Thanks a lot sir , your teaching skills are impressive and your grip on power systems too. You saved my semester

[@DrAfrozAlam]

You are most welcome Saif

[@cricketmastera.k2917]

@@DrAfrozAlam sir did u make videos on power system protection?

[@DrAfrozAlam]

Not yet

[@cricketmastera.k2917]

@@DrAfrozAlam can you suggest me the best video series on PSP?

[@DrAfrozAlam]

No idea

[@surendrakverma555]

Thanks and Regards Sir 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏

[@madura-h7m]

love you from Sri lanka

[@kamrantaz]

Thank you sir for such lucid explanation..

[@pinkkitty6553]

Sir what is the difference between zero sequence network of a motor load and a synchronous generator?

[@surendrakverma555]

Excellent lecture Sir. Regards

[@deathxunnat4693]

can someone explain whats being said at 44:26 the audio isnt clear

[@akhilchikku1050]

Two motor loads are parallel, and one of it is grounded so second motor load also get return path??? Can we close the switch

[@challurisrinivas5662]

Sir delta connection lo positive sequence network of transformer possible avutunda

[@हाव7ज]

Sir ap bahut axa padhate hai likha kariye English me samjhaya kariye hindi me taki sab diploma vale v samajh sake

[@mdnahidislam1908]

Sir, for sequence network of transformers, will the positive and negative sequence network remains the same whether delta or Y connection? Thanks in advance

[@DrAfrozAlam]

Yes

[@TonmoyBhowmik]

Sir, At 16:40 and 17:44 I have a confusions over delta-wye configuration of transformer. I have some reference books, where series switch of the ungrouded Y side remain closed and shunt switch of delta side kept open whenever its delta-wye or wye-delta(in both y is ungrounded) which is really contradictory! Reference books are: 1.power system analysis by Grainger & Stevenson. 2. Elements of power system by Stevenson 3. Modern power system analysis by Kothari & Nagrath (3rd ed.) 4. Power system analysis by nagsarkar & sukhija 5.Power system analysis by Hadi Saadat However sir thanks a lot for all those lectures, i will remain indebt to you. Thanks from the bottom of my heart and love from Bangladesh.

[@DrAfrozAlam]

How series switch of ungrounded Y can be closed? Please know the fact that zero sequence current can't get path via ungrounded neutral, hence will be absent in phases as well. That's why series switch is open circuited.

[@TonmoyBhowmik]

Got it sir, thank you. I was actually confused seeing all of those books contradicting only in the case of Delta-Star(ungrouded) zero sequence network; which they also have mentioned as a special case.

[@AmoasiEugene]

Hello Doc. why is the series switch not open for the second transformer on the secondary side since it is delta?

[@DrAfrozAlam]

This has been corrected in the following video lecture: kzbin.info/www/bejne/f5ivn6R_e8eZidE

[@AmoasiEugene]

@@DrAfrozAlam could I please get the lecture video for machine operation chart. I mean how to draw machine operation chart.

[@AmoasiEugene]

@@DrAfrozAlam thank you for the answer.

[@madura-h7m]

adarei mahaththayo

[@akhilchikku1050]

Sir, secondary of transformer T2 is delta connected, then why the series switch is closed.

[@akhilchikku1050]

In zero sequence network

[@akhilchikku1050]

In zero sequence network

[@DrAfrozAlam]

kzbin.info/www/bejne/f5ivn6R_e8eZidE

[@kasimshaikh2374]

Sir , please let me know why source voltage E is not shown in positive sequence network of transformer and transmission line ..

[@DrAfrozAlam]

As these are not voltage generating sources. However, the voltage drop (with respect to Reference bus) appears on Sending as well as Receiving ends.

[@kasimshaikh2374]

@@DrAfrozAlam Thankyou for your efforts and sharing your knowledge in facile way ...!!

[@DrAfrozAlam]

You are always welcome dear.

[@peteriruna8267]

Thank you sir for good lectures, was requesting for billing process why can't you include Paypal please for membership.

[@amansanatani6393]

Transformer network ma reference bus impedance sa join kyo nhi ho rhi jese generator ma ho rhi he

[@DrAfrozAlam]

It will be connected to the reference bus in zero sequence network only provided windings are connected in delta. For details, please watch the whole lecture.

[@Binilbabu42]

Dr. Afroz Alam Sir, Your lectures are superb 👌👌. But I am also bit confused about the positive & negative sequence network diagram for the transformer. Why the reference bus is not connected to the impedance line as in synchronous generators ? Many Thanks in advance ..!!