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### Highlights from backward forward sweep method for radial distribution system

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# backward forward sweep method for radial distribution system

### yared tassew (view profile)

13 Feb 2013 (Updated )

this is matlab code that is designed for distribution load flow using backward forwad sweep method

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Description

this is matlab code that is designed for distribution load flow using backward forwad sweep method using BIBC matrix method. it also include code that adjust your line data in to standard form if you accidentally interchange the sending and receiving end node.

Acknowledgements

Back Forward Sweep Algorithm For Radial Distribution Systems inspired this file.

Required Products MATLAB
MATLAB release MATLAB 7.7 (R2008b)
MATLAB Search Path
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27 Jul 2016 Saran Satsangi

### Saran Satsangi (view profile)

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30 Mar 2016 yared tassew

### yared tassew (view profile)

hello,
dear Oktoviano Gandhi the positive complex and negative complex related to the voltage angle not the power loss. You can just calculate the power loss by multiplying the line current square with the line resistance.
thank you.

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30 Mar 2016 Oktoviano Gandhi

### Oktoviano Gandhi (view profile)

Dear Yared Tassew,

Thanks for the code, it helped me a lot. However, when I tested on 33-bus radial system, some node voltages have positive complex component while others have negative complex component. This causes positive and negative power losses across the branches. Do you have any idea on what is wrong? Thanks!

18 Dec 2015 yared tassew

### yared tassew (view profile)

Dear Mohamed,
send me the data and i will check it

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18 Dec 2015 Mohamed Ali

### Mohamed Ali (view profile)

Dear Yared,
What is that mean the central bus?
If I choose 9 bus IEEE radial dist. system,
and select central bus as 1, it gives me error

(((Index exceeds matrix dimensions.
NLD=LD(c,:);)))

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15 Oct 2015 yared tassew

### yared tassew (view profile)

is the IEEE 118 bus system radial distribution system? if it is it will work fine.

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30 Sep 2015 Ramaseshan Rajasekaran

### Ramaseshan Rajasekaran (view profile)

Dear yared tassew,

How can i execute your code on a IEEE 118 bus test system

when the code is executed, i get Index error

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13 Jul 2015 Divya

### Divya (view profile)

Can the bibc matrix logic be adjusted accordingly?

24 Jun 2015 Divya

### Divya (view profile)

Can you say how?

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24 Jun 2015 yared tassew

### yared tassew (view profile)

hello divya if you choose any bus as a central bus you have to check still the system is radial.

that is why it is showing error the system is not radial when you choose a different bus. So make sure the system is still radial when you choose a different bus.

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24 Jun 2015 Divya

### Divya (view profile)

When other buses like 2 or 3 are selected as central bus the program is giving error.Can this program be used for having central bus other than first bus?

23 Jun 2015 Divya

### Divya (view profile)

For central bus other than first bus the code is showing error.

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25 Nov 2014 yared tassew

### yared tassew (view profile)

hey Guzman I also include the BCBV matrix in this post

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24 Nov 2014 Guzman

### Guzman (view profile)

The error was mine! Your code is correct. Simply you defined the BCBV from the BIBC matrix through the impedance matrix. It is perfect. I'm sorry.

24 Nov 2014 Guzman

### Guzman (view profile)

I've been reviewing your code, and I think that you might have an error at the forward sweep. Note that your matrix TRX is probably meant to find the voltage deviations at each iteration. If so, you should not be using the BIC matrix, but the branch-current to bus-voltage (BCBV) matrix, which seems to be missing in your code. Am I right?

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16 Nov 2014 HAMID REZA

### HAMID REZA (view profile)

23 Sep 2014 JAYA PRAKASH

### JAYA PRAKASH (view profile)

plz add some files(information related to backward forward sweep method and B.I.B.C) related to theory of above method.

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27 May 2014 Hosein

### Hosein (view profile)

19 Feb 2013 yared tassew

### yared tassew (view profile)

guys im doing some improvement on this code i will post it soon. which includes the bcbv matrix which make it easier

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