// All comments follow the "//" (double backslash)

//

// Make sure that both "ee499.exe" and "psap.exe" are in the same directory

//

// Open "ee499.exe" and follow the below transcript





Enter a bus node or press <0> to quit: 1

Enter a bus node or press <0> to quit: 2

Enter a bus node or press <0> to quit: 3

Enter a bus node or press <0> to quit: 0



Enter the two nodes that the branch links or press <0> to quit:1 2

Enter the two nodes that the branch links or press <0> to quit:2 3

Enter the two nodes that the branch links or press <0> to quit:3 1

Enter the two nodes that the branch links or press <0> to quit:0



Enter the node at which you wish to place a generator or press <0> to quit:1

Enter the node at which you wish to place a generator or press <0> to quit:2

Enter the node at which you wish to place a generator or press <0> to quit:0



Enter the node at which you wish to add load or press <0> to quit:3

3

Enter the node at which you wish to add load or press <0> to quit:0

0





There are 3 buses, 3 branches, 2 generators, and 1 loads in your grid.



Enter the PER UNIT generation at the following generators (if a slack bus, enter

 anything):

generator 1-1: 0



generator 2-1: 2.6







Enter the real and reactive power used at the following loads, separated by a SP

ACE:

load 3-1: 3.1 -1.8







Enter the voltage magnitudes at the following P-V buses:

bus 2: 1.1





Which bus is the slack bus? 1





Enter the SHORT-LINE impedances of the following branches:

1-2-1: 0.5



2-3-1: 0.4



3-1-1: 0.3







Open pf.txt.  Then select the contents and paste them into a file to run in psap

.exe.  After running the power flow, copy the result and paste it into pf.txt.

When done, type anything to continue.





// At this point the above window is waiting

// DON'T close it!

// Open "psap.exe"





POWER SYSTEM ANALYSIS PROGRAM - PSAP

----- ------ -------- -------   ----

        by James Cote



VERSION 4.3--- December 23, 1988





PSAP >>> read pf.txt                   

 

END OF INPUT FILE FOUND.                    // hit "enter" if no changes

ENTER LINE DATA :

FROM,TO,ID,R,X,GF,BF,GT,BT,STATUS,RATING



ENTER DC LINE DATA :                        // hit "enter" 

FROM,TO,MODE,ORDER,VDC,R,ALPHA,MIN,MAX,LOW,GAMMA,MIN,MARGIN,

BRIDGES,MVA,TURNS RATIO,REACTANCE,DCTAP,ACTAP,TAPHI,TAPLO,TSTEP (RECT)

BRIDGES,MVA,TURNS RATIO,REACTANCE,DCTAP,ACTAP,TAPHI,TAPLO,TSTEP (INVT)



ENTER TRANSFORMER DATA :                    // hit "enter"

FROM, TO, ID, R, X, FRMVLT, TOVLT, STATUS, RATING





SYSTEM SUMMARY :



  3 BUSSES

  2 GENERATORS

  3 AC LINES

  0 DC LINES

  0 TRANSFORMERS













PSAP >>> solve

NUMBER OF YBUS TERMS =   6



ITER    DELTA P(BUS#)  DELTA ANG(BUS#)    DELTA Q(BUS#)    DELTA V(BUS#)

------------------------------------------------------------------------

   1     3.1000(   3)     .37250(   3)      .9119(   3)     .15633(   3)

   2      .2592(   3)     .04029(   3)      .1589(   3)     .02356(   3)

   3      .0282(   3)     .00470(   2)      .0211(   3)     .00319(   3)

   4      .0035(   3)     .00043(   3)      .0033(   3)     .00050(   3)

   5      .0008(   3)     .00009(   3)      .0004(   3)     .00006(   3)

   6      .0000(   2)     .00000(   2)      .0001(   3)     .00001(   3)



SOLUTION REACHED IN  6 ITERATIONS.



PSAP >>> write pf.txt

DELETE EXISTING FILE ? y



FINISHED WRITING PF.TXT



PSAP >>> stop 



// The "psap.exe" window should have disappeared after hitting "enter"

// 

// Now switch back to the "ee499.exe" window

// Continued from above...



Open pf.txt.  Then select the contents and paste them into a file to run in psap

.exe.  After running the power flow, copy the result and paste it into pf.txt.

When done, type anything to continue.



c        // any "char" character will suffice here--"c" is a random choice





Branch flows (from node1 to node2 at node1):

1-2-1  -0.741431 0.142345

2-3-1  -1.85852 -0.356382

3-1-1  -1.2417 0.24105



c

Radials branches/buses:





Loop branches/buses:

1-2-1

2-3-1

3-1-1



1

2





c       



Here are the branch weights:

1-2-1  -2

2-3-1  5

3-1-1  3



c        // after hitting "enter" here, the "ee499.exe" window disappears