Numerical on Newton-Raphson Method of Load Flow | Part 1

Note: At time 14:40, please read the substituted values of the variables/parameters of P3° as,
P3° = 1.04[31.6228*1.05*Cos(108.4349° + 0° - 0°) + 35.7771*1*Cos(116.5651° + 0° - 0°) + 67.2309*1.04*Cos(-67.2490°)]
= 1.04[-10.5000 - 16.0000 + 27.0400]
= 0.5616 p.u.

[@DrAfrozAlam]

The elements of Ybus used in this problem have been calculated in the following video lecture (starting at time 2:25): kzbin.info/www/bejne/qmrXl2CmnMaWlck

[@DrAfrozAlam]

Note: At time 14:40, please read the substituted values of the variables/parameters of P3° as, P3° = 1.04[31.6228*1.05*Cos(108.4349° + 0° - 0°) + 35.7771*1*Cos(116.5651° + 0° - 0°) + 67.2309*1.04*Cos(-67.2490°)] = 1.04[-10.5000 - 16.0000 + 27.0400] = 0.5616 p.u.

[@DrAfrozAlam]

Download hand-written lecture notes (pdf) using the following link: drive.google.com/file/d/10_A3zXCcfjhpf32bLFA2vzmXjzmhV9Xf/view?usp=sharing

[@hello.667]

sir you are one of the best teachers

[@ruth_sire592]

Thanks from Kenya you are a life saver.

[@DrAfrozAlam]

You can download hand-written lecture notes (pdf) using the following link: drive.google.com/file/d/10_A3zXCcfjhpf32bLFA2vzmXjzmhV9Xf/view?usp=sharing

[@bazmenizami5578]

The method of explaining is very well. The doubt clear very easily

[@DrAfrozAlam]

Thank you for the feedback

[@DrAfrozAlam]

Download hand-written lecture notes (pdf) using the following link: drive.google.com/file/d/10_A3zXCcfjhpf32bLFA2vzmXjzmhV9Xf/view?usp=sharing

[@milin_234]

Excellent explaining sir.. very detailed teaching..thank you very much..

[@DrAfrozAlam]

Download hand-written lecture notes (pdf) using the following link: drive.google.com/file/d/10_A3zXCcfjhpf32bLFA2vzmXjzmhV9Xf/view?usp=sharing

[@kadusirajulmuneer4202]

Thank u so much sir for these problems. These are very much helpful for revision during our exams.

[@DrAfrozAlam]

Download hand-written lecture notes (pdf) using the following link: drive.google.com/file/d/10_A3zXCcfjhpf32bLFA2vzmXjzmhV9Xf/view?usp=sharing

[@octavianak5240]

Very nicely explained sir ❤

[@m.bhargav3938]

Very good explanation sir....this video's are very helpful to me

[@nelsonumeh3398]

Thanks so much Dr for the easy explanation. Dr, do you have a lecture video on 4 buses using Newton Raphson method?

[@adityapattnaik1405]

Very precisely explained sir.

[@DrAfrozAlam]

Download hand-written lecture notes (pdf) using the following link: drive.google.com/file/d/10_A3zXCcfjhpf32bLFA2vzmXjzmhV9Xf/view?usp=sharing

[@SachinRathod-ls8eb]

Very nice explanation. Thank you.

[@lolololo2965]

Allah bless you Dr , these videos are very useful.

[@naturejourney6657]

amazing lecture sir

[@neenoo12345]

جزاك الله خيرًا وبنا لك قصرًا في الجنة.

[@danielokonkwo9786]

Dr, I have been following your series on power/load flow analysis and it has been quite engaging to be honest....like the way you make problems quite ease to comprehend. Now my challenge/confusion is that i do before while solving do take the powers(P & jQ) for PV bus as positive and the powers for load buses as negative...going through your series especially during the gauss-seidel method I didn't see anything like such. Please Dr can you clarify me. Thank YOu

[@DrAfrozAlam]

The load power and the generator power at each bus have been combined together (Represented by Si). Where, Si = SGi - SLi = (PGi - PLi) + j(QGi - QLi). Please see (at time 5:55) the following video lecture: kzbin.info/www/bejne/aHW2l5poa5uIjMU

[@DrAfrozAlam]

Download hand-written lecture notes (pdf) using the following link: drive.google.com/file/d/10_A3zXCcfjhpf32bLFA2vzmXjzmhV9Xf/view?usp=sharing

[@shoryadixit8401]

Thanks sir so easy to understand

[@taimurkhan5719]

Excellent effort Prof. Please do make videos about Brute Force technique.

[@shoryadixit8401]

Thank you so much 💓 sir

[@newindia294]

👌👌👍 Happy teacher's day Sir

[@DrAfrozAlam]

Thanks a lot

[@오랑우탄단지]

3:14 Why do we have delta p2, p3, q2 but not delta q3?

[@sudish4602]

because p2, p3, q2 have specified values, where q3 specified is unknown

[@vijayvarma5501]

Because q3 unknown

[@Followtheclass]

Excellent sir..., too good.

[@DrAfrozAlam]

Thank you Ganesh

[@sanjuson6]

Super

[@mohammedhassanmohammed8116]

Thank you Dr.👌👌

[@DrAfrozAlam]

You are most welcome

[@souravde6116]

In newton raphson method of loadflow, do the reactive power generation of the generator bus changes with load? If yes, then how. it could be incorporated in NR load flow as we donot use corresponding Q of that PV bus to calculate mismatch vector?

[@azamali3237]

Jazakallah sir

[@Unkn0wn_gaming0-y1d]

Sir 23:55 min me 2 * kese hua

[@bismazaffarele0278]

Sir ,how to calculate angle 21,22,23 like wise ??..here theeta 21 is 63.43degree ,but u have given 116.5651?

[@DrAfrozAlam]

We have Y21=-10+j20 = 22.3606∠116.5651°. It can also be observed that Y21 lies in second quadrant. Hence, it's angle will lie between 90 degrees and 180 degrees.

[@bismazaffarele0278]

@@DrAfrozAlam but sir how Y12 can be -10+20i??..by calculation I got +10-20i

[@DrAfrozAlam]

Remember that Y21 = - y21. For more details, you may watch the following video lecture before solving numericals: Bus Admittance Matrix (In Hindi): kzbin.info/aero/PLEVP-S4VFKO-BAGScDSifBQQLGXRPwjvb

[@EchoesofErrorshorts]

Sir how did u calculate theta(21) and theta(22) extra

[@DrAfrozAlam]

Newton-Raphson Method of Load Flow: kzbin.info/aero/PLEVP-S4VFKO9HEb7Mozh_sEQzekft-DLn

[@EchoesofErrorshorts]

@@DrAfrozAlam thnx sir

[@DrAfrozAlam]

Download hand-written lecture notes (pdf) using the following link: drive.google.com/file/d/10_A3zXCcfjhpf32bLFA2vzmXjzmhV9Xf/view?usp=sharing

[@vishu984]

Bus 2 is PQ bus , where Q is specified , then why deltaQ2 and not deltaQ3 ?

[@DrAfrozAlam]

Because, Q3 is not specified parameter

[@vishu984]

@@DrAfrozAlam OK, I got it. Since Q3 is not specified we can't calculate deltaQ3 as in case of Q2 which is specified. Thank you

[@DrAfrozAlam]

Most welcome dear. Before solving numericals, it is advised to learn the theoretical concepts. If you need, you may watch the following lectures: Newton-Raphson Method of Load Flow: kzbin.info/aero/PLEVP-S4VFKO9HEb7Mozh_sEQzekft-DLn

[@vishu984]

@@DrAfrozAlam sure sir , I have electronics background, but, slowly I am getting it.

[@pubgmobile2985]

i have question and i want to solve it?

[@murtazabugti8305]

what is the value of teta21 and delta1 I am confuse

[@DrAfrozAlam]

To understand this, you need to watch the following lectures before solving problems: Newton-Raphson Method of Load Flow: kzbin.info/aero/PLEVP-S4VFKO9HEb7Mozh_sEQzekft-DLn

[@DrAfrozAlam]

You can download hand-written lecture notes (pdf) using the following link: drive.google.com/file/d/10_A3zXCcfjhpf32bLFA2vzmXjzmhV9Xf/view?usp=sharing

[@vedicmishra9124]

Thank You sir..

[@MrJinggo12]

How to do for 2nd itteration sir?

[@DrAfrozAlam]

Before solving numericals, you should watch the following video lectures to understand each step: Newton-Raphson Method of Load Flow: kzbin.info/aero/PLEVP-S4VFKO9HEb7Mozh_sEQzekft-DLn

[@vishnuvimalvishnuviaml1402]

Sir how we write it as del p2, del p3, del Q2

[@vishnuvimalvishnuviaml1402]

And also how we take v2=1pu, del2=0pu, del3=0pu. Please reply me sir🙏

[@DrAfrozAlam]

For details of each and every steps of N-R method of load flow, you may watch following lectures: Newton-Raphson Method of Load Flow: kzbin.info/aero/PLEVP-S4VFKO9HEb7Mozh_sEQzekft-DLn

[@findme1681]

Why we are not calculating Q3

[@DrAfrozAlam]

Before solving numericals, it is advised to learn the theoretical concepts. If you need, you may watch the following lectures: Newton-Raphson Method of Load Flow: kzbin.info/aero/PLEVP-S4VFKO9HEb7Mozh_sEQzekft-DLn

[@pranjalpandey1646]

Thank you very much sir....Thanks a lot

[@DrAfrozAlam]

Most welcome Pranjal

[@savasd3893]

Hallo Mr Dr.Afroz Alam at first thank you very much for this videos generally its very helpfull. I have a question the derivation from 54.2799 should be negative because cos derivation is -sin (dP2/ddelta2= -54.2799) do I have maybe false ???

[@DrAfrozAlam]

In the following video lectures, the various steps have been explained in detail: Newton-Raphson Method of Load Flow: kzbin.info/aero/PLEVP-S4VFKO9HEb7Mozh_sEQzekft-DLn

[@DrAfrozAlam]

Download hand-written lecture notes (pdf) using the following link: drive.google.com/file/d/10_A3zXCcfjhpf32bLFA2vzmXjzmhV9Xf/view?usp=sharing

[@alim3998]

hi we need manual solution of text book (power system analysis and design ) B A GUPTA third edition ..... please

[@pulkitchouhan1809]

Q2 m - nhi + aayega

[@janaliebrahimi4989]

Sir in calculation of p3 where is the term y33 magnitude?

[@DrAfrozAlam]

Please check at time 14:11

[@DrAfrozAlam]

Note: At time 14:40, please read the substituted values of P3° as, P3° = 1.04[31.6228*1.05*Cos(108.4349° + 0° - 0°) + 35.7771*1*Cos(116.5651° + 0° - 0°) + 67.2309*1.04*Cos(-67.2490°)] = 1.04[-10.5000 - 16.0000 + 27.0400] = 0.5616 p.u.

[@DrAfrozAlam]

Download hand-written lecture notes (pdf) using the following link: drive.google.com/file/d/10_A3zXCcfjhpf32bLFA2vzmXjzmhV9Xf/view?usp=sharing

[@techfriezsolutions]

explain in a detail way don't tell us to solve we don't even know how to solve prblm....

[@DrAfrozAlam]

For detailed explanation, first you need to watch the following lectures: Newton-Raphson Method of Load Flow: kzbin.info/aero/PLEVP-S4VFKO9HEb7Mozh_sEQzekft-DLn

[@gods_eye6232]

Sir p3 zero ki term m wo value kaisey cancel hue hai and what is the meaning of r or r -1 Please explain this bs isi confusion ki wjh s y topic complete nhi hua hai abhi tk please explain this 😟😟😟

[@DrAfrozAlam]

Before Solving the problem, please watch the following lectures (to understand various steps in details): Newton-Raphson Method of Load Flow: kzbin.info/aero/PLEVP-S4VFKO9HEb7Mozh_sEQzekft-DLn

[@DrAfrozAlam]

Note: At time 14:40, please read the substituted values of the variables/parameters of P3° as, P3° = 1.04[31.6228*1.05*Cos(108.4349° + 0° - 0°) + 35.7771*1*Cos(116.5651° + 0° - 0°) + 67.2309*1.04*Cos(-67.2490°)] = 1.04[-10.5000 - 16.0000 + 27.0400] = 0.5616 p.u.

[@bismazaffarele0278]

Too long

[@DrAfrozAlam]

Yes, because you are solving a numerical on "Newton-Raphson method of load flow", which is not an easy task.

[@moneygaming09]

Ye topic banaya hi kyu hai to phir