How To Solve Load Flow Analysis of IEEE 5-Bus System in MATLAB | Dr. J. A. Laghari

[@kshiprapandey8222]

Thank you, Sir. This was very informative.

[@DrJALAGHARI]

Thanks for the compliments.

[@david_slaughter]

Solved exercises here:
drive.google.com/file/d/1MVyAFhUAYrfgPA0l4nwAUlcXcr9kR3_L/view?usp=share_link

[@DrJALAGHARI]

I couldn't understand your message

[@akramulhaque7899]

Great Effort Sir

[@DrJALAGHARI]

Thanks for the compliments. Do share it within your circle too.

[@alghifarimhrn]

sir, is it using newton raphson methode or gauss-seidel methode?

[@DrJALAGHARI]

Just check the program, if lfnewton is written then newton raphson method is used.

[@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?

[@DrJALAGHARI]

Thanks for the comment. I am not sure. But look at the data, in data reactive power limite are given or not?

[@felixprofpk7773]

Sir please help me with the mfile. Can't find it in the description section below

[@DrJALAGHARI]

Thanks for the comment. Send the email to [e-mail] it will be sent to you.

[@oliverkofimawuenaadjavor645]

Hello Sir, thank you for the explanation.
But I could find Newton Raphson m.file in the file you uploaded on Google drive. Can I get the Gauss Seidel m.file as well?

[@DrJALAGHARI]

Thanks for the comment. I have sent to your email.

[@PARTHAPRATHIMDAS]

Dear Sir,
I've searched all of your videos but didn’t find how to save the matlab folder of Hadi Sadat Power System Analysis using set path.Can you kindly help me with this???

[@DrJALAGHARI]

Thanks for the comment. You send email to [e-mail], it will be sent to you.

[@Acerosilicon]

@@DrJALAGHARI Firstly, thank you for this video, and secondly, I also have the same problem, can you help me with the Hadi Sadat Power System Analysis folder? thank you

[@santhoshraikar4019]

Dear sir how to run the swing curve of Hadi saddath text book example no 11.6 I am getting error kindly give some input how many file I shall run sir

[@DrJALAGHARI]

Thanks for the comment. Actually this program contains many built-in functions made by hadi sadat. Therefore, you have to change the name and extension of all these functions from capital letters to small letters one by one. Then it will run properly.

[@TheSaidul]

sir we dont have video on how to save matlab folder of hadi saadat book

[@DrJALAGHARI]

This video is unavailable due to UA-cam change in policy. If you need then i may send it to you through email.

[@ArmanAli-ww7ml]

Also what if we want to give variable data of load and generation at particular bus? I mean instead of giving fix values to the bus , how we can give multiple time changing values for load and generation at any bus like bus 2? How to do it?

[@DrJALAGHARI]

Thanks for the comment. My question is that why to do it? first it is an standard IEEE system which already has its rated values. therefore, we have to perform its load flow analysis using these values. second, if you want to change the values for your own, you may change it manually and observe the load flow. may be it work or may not depending upon the power capacity and transmission line losses.

[@ArmanAli-ww7ml]

@@DrJALAGHARI can we change the bus load and generation keeping the line parameters constant?

[@DrJALAGHARI]

@@ArmanAli-ww7ml It depends upon the purpose. If you want to know the future expansion and want to know whether existing system will be able to supply the future increased load then you only change the load keeping the generation constant. If it is not able to supply the increased load then change the generation to see how much generation is required. Transmission line parameters remains constant unless you upgrade the transmission voltage. Therefore, don't change the transmission parameters.

[@ArmanAli-ww7ml]

@@DrJALAGHARI ok will keep the voltage and line parameters constant. Will change power generation and load at each bus to see the behavior

[@mdsuvonmahmud858]

After running this programme, an error occurs.we can't solve this error (lfybus).how is it possible to solve this error let us know plz.

[@DrJALAGHARI]

Thanks for the comments. Have you downloaded the folder from the link given in the description section of the video. Then just save it in any drive. Then open that folder in the matlab current folder section. Then open the ieee5bus load flow program m file. Then run it. It will surely run. Please follow the steps.

[@alaamohammedsoliman3089]

Thanks, Sir. How can I calculate line charging susceptance when I know shunt susceptance and total charging MVAR?

[@DrJALAGHARI]

Thanks for the comment. Normally this value is provided in the data. for calculation, you may kindly follow any book.

[@drakenmaster9315]

Sir if i want to find load flow for 33 bus system ? Is it just change the data ? Tq

[@DrJALAGHARI]

Yes.

[@sandhyarani7349]

Hello sir the link which you have posted here is not opening. Can you please send me the IEEE 5 bus system code sir

[@DrJALAGHARI]

Thanks for the comment. Send email to [e-mail] it will be sent to you.

[@kshiprapandey8222]

Hello Sir, Have you made any video for 100 bus system or any system having more than 50 buses?

[@DrJALAGHARI]

Thanks for the comment. No not yet. But same program can be used for 100 bus system by changing the data. Or watch my video on load flow analysis of ieee 9 bus system using MATPOWER toolbox. It Will hrlp you alot.

[@kshiprapandey8222]

@@DrJALAGHARI Sure sir. Thanks.

[@احمداسدخان]

thank for yours kind, how can i contact you , i need some help with 57 buss ,400 kv super high voltages, mat lap coding contingency analysis

[@DrJALAGHARI]

Thanks for the comment. for this, you can follow the idea from this video and watch other tutorials too for clarifying the concept.

[@oyeladunrhoda2120]

Why is bus two considered PQ bus instead of pv bus?

[@DrJALAGHARI]

Thanks for the comment. Actually here bus 2 has both generator as well as load. Whereas, the PV bus is generally one which has generation only. Therefore, due to both generator and load, in this program it is considered as PQ bus. Otherwise, it gives wrong results in terms of active power supplied.

[@ArmanAli-ww7ml]

Why slack bus value for voltage kept at 1.06pu

[@DrJALAGHARI]

Thanks for the comment. I think it is already given in the data.

[@fauzanyuda1523]

sir, why im using 10 bus data, there is error at lfnewton.m, he said (Index exceeds the number of array elements (3) , thank you sir

[@DrJALAGHARI]

Thanks for the comment. Kindly check your data. Is it correctly inserted or not?

[@fauzanyuda1523]

@@DrJALAGHARI thank you very much sir, i can solve my problem now

[@fauzanyuda1523]

excuse me sir, i want to ask in program matlab, what the meaning for A, DC, DX, Lk,Lm, and LL , thank you sir

[@fauzanyuda1523]

at program matlab newton raphson

[@santhoshraikar4019]

Hello sir IEEE 5 bus system simulation file which file we can run first after upload setup file

[@DrJALAGHARI]

Thanks for the comment. Sorry I couldn't understand your question?

[@chaladame329]

Thank you sir. The folder you load up have not open.

[@DrJALAGHARI]

Thanks for the comment. May I know the reason why it is not opening? or you may send email to [e-mail], it will be sent to you.

[@felixprofpk7773]

Hello sir how can you help me to run IEEE 14 bus. Have tried it with my data not working

[@DrJALAGHARI]

Thanks for the comment. Try to use matpower toolbox.

[@raselbasunia3436]

Sir, plz provide me the reference link from where you take this overall system data like bus,line, machine. Ieee 5 bus14bus reference link . I am grateful to you. Thank you sir.

[@DrJALAGHARI]

Thanks for your query. I exactly dont remember where from I have taken this data. you may kindly search it on google, I am sure you will definitely find this data reference.

[@shifanasherin3788]

How to do load flow in by gauss siedel method?

[@DrJALAGHARI]

Thanks for the comment. To do this by gauss Seidel method, just change the command for lfgauss. Or watch my video on load flow analysis using all three methods.

[@shifanasherin3788]

@@DrJALAGHARI thank you sir

[@shifanasherin3788]

Can you please tell me how to identify the weakest bus from the load flow output

[@santhoshraikar4019]

Hello I need some input to write Matlab code or either modelling of multi machine swing curve for stability studies

[@DrJALAGHARI]

Thanks for the comment. I think you may seqrch it on matlab central file exchange. May be it is available there.

[@santhoshraikar4019]

@@DrJALAGHARI I have searched sir only smib swing curve program I got

[@santhoshraikar4019]

@@DrJALAGHARI I searched sir but smib swing curve I got but not multimachine swing curve

[@anuj6736]

Iam unable to open the file which is in RAR form. Is there a way to send it separately ?

[@DrJALAGHARI]

Thanks for the comment. Do you have rar software installed or not ?

[@anuj6736]

@@DrJALAGHARI No I do not. Which one do you recommend?

[@anuj6736]

@@DrJALAGHARI Sir, another question, what is the bus code for a PV Bus? and are the Mw and Mvar values in Bus data in p.u.?

[@DrJALAGHARI]

@@anuj6736 just search on google about winzip software and download it. Then it will open all files.

[@DrJALAGHARI]

@@anuj6736 bus code for PV bus is 2 i think according to Hadi Sadat Book. Units are written in Table. When you will download the Files, it will be eaay for you to understand.

[@monaali8465]

Thank you, but the program can't run with me

[@ArmanAli-ww7ml]

how did we get the Generation on bus 1 as (129.59) we did not apply any generation on that bus?

[@DrJALAGHARI]

Generator 1 is slack bus. The slack bus provide the power after the load flow solution is completed in order to supply the total load plus losses.

[@raselbasunia3436]

Sir, kindly make a video on power system transient stability analysis of multi machine system based on Hadi Sadat Matlab codes

[@DrJALAGHARI]

Thanks for the comment. Sure.

[@ericnascimento4106]

May i run a 30 bus system on the code ?

[@DrJALAGHARI]

Yes. You can do it.

[@shafiqahsohaimi2471]

Hello Sir, thank you for the meaningful video.
May I ask for IEEE 6 bus system?
Thank you

[@DrJALAGHARI]

Thanks for the compliments. Do you have any such system with data?

[@alghifarimhrn]

sir, for the line charging susceptance data written 1/2 B, Do i have to divide the B value into half?

[@DrJALAGHARI]

Thanks for the comment. It depends upon the software. Different softwares ask for different values. Some ask for whole value whereas some ask for half value.

[@kshiprapandey8222]

Hello Sir, How can i get analytical solution of this numerical ? i mean by using formulae and all

[@DrJALAGHARI]

Personally I don't have the mathematical solution at the moment. But it can be done manually by anyone using the mathematical formula.

[@MOKRABachour]

wonderful

[@DrJALAGHARI]

Thanks. Kindly share it within your circle so that they may also get benefit from it.

[@MOKRABachour]

@@DrJALAGHARI Sir i need help about transient stability?

[@DrJALAGHARI]

@@MOKRABachour I am sorry. Due to my busy schedule I may not be able to give you sufficient time. Thanks

[@aqilhakim3459]

hello sir, i already follow ur step but my case is ieee 37 bus system so i just add on until 37 bus with my own data but after i run there is some error that state like this, so what supposed to do in order to solve this problem. may u help me sir bcs i am in urgent. thank you
IEEE5bus
Index exceeds the number of array elements (36).
Error in lfnewton (line 83)
DC(nn) = P(n)-Pk;
Error in IEEE5bus (line 89)
lfnewton % Power flow solution by Newton Raphson method

[@DrJALAGHARI]

Thanks for the comment. Kindly check the data.

[@aqilhakim3459]

@@DrJALAGHARI sir i already check my data, all is correct can u check it for me i will give the file of ieee 37 bus through your email i am really ur help please sir

[@DrJALAGHARI]

@@aqilhakim3459 ok send it on my email. [e-mail]

[@aqilhakim3459]

@@DrJALAGHARI thank u sir, i just u the file of ieee 37 bus

[@محمدصوفان-ي1ه]

Can i contact with you please ?

[@ArmanAli-ww7ml]

also my lfybus function is not working, i have made the folder as current folder but it is not working

[@DrJALAGHARI]

What is the problem you are facing?

[@ArmanAli-ww7ml]

@@DrJALAGHARI getting error that you got for lfybus, tried to resolve it by making current folder as you suggested but still error is the same

[@ArmanAli-ww7ml]

@@DrJALAGHARI Unrecognized function or variable 'lfybus'.

[@DrJALAGHARI]

@@ArmanAli-ww7ml do you have hadi sadat matlab folder programs or not? Kindly watch video step by step for better understanding

[@ArmanAli-ww7ml]

@@DrJALAGHARI i tried to find that video you suggested but couldn’t find, please share the link here or in the description of this video

[@felixprofpk7773]

Please sir help me with the mfile

[@DrJALAGHARI]

Thanks for the comment. Send the email to [e-mail] it will be sent to you.

[@ArmanAli-ww7ml]

Unrecognized function or variable 'LFYBUS'. all these functions are not working, lfybus lfgauss busout and lineflow

[@DrJALAGHARI]

Just change the name from capital letters to smaller letter such as LFYBUS M to lfybus.m similarly change all the names then it will run.

[@ArmanAli-ww7ml]

@@DrJALAGHARI tried it this way, It isn’t saving after changing the name neither i am permitted to change, there is another error for that as well

[@cicerolima7410]

It's important that video therefore a didn't find it, please put it in the card.

[@DrJALAGHARI]

Thanks for the comment. May I know which video you are talking about?

[@afnanghaleb3037]

Can I contact you sir , cuz I really need ur help in short circuit

[@DrJALAGHARI]

Thanks for the comment. I am sorry I may not be able to give you time due to my busy schedule.

[@basitali8978]

Sir IEEE-30 bus aglee video ma banain psse ma

[@DrJALAGHARI]

Thanks for the comment. Currently my focus is on MATLAB and power world simulator.

[@oyeladunrhoda2120]

Why is bus two considered PQ bus instead of pv bus?

[@DrJALAGHARI]

in order to fix the reactive power limit. otherwise, reactive power limit is changed.

[@oyeladunrhoda2120]

Why is bus two considered PQ bus instead of pv bus?

[@DrJALAGHARI]

in order to fix the reactive power limit. otherwise, reactive power limit is changed.