sir
as i sent previous mail.i tried the as below for a 0.5*41,where i take 41
as the peakload,by considering period of 8hrs,and the load change at 3rd
bus,i got it but some error came and i want to include for 0.8 and
1*peakload for 4hrs and 10 hrs respectively.


 mpc = loadcase('case14o');
>> define_constants;
>> for factor=0.5
mpc.bus(3,PD) = factor*41.0;
mpc.bus(3,QD) = factor*41.0;
for t=1:8
mpc(t)=mpc;
results(t) = runopf(mpc(t));
end
end

MATPOWER Version 5.1, 20-Mar-2015 -- AC Optimal Power Flow
MATLAB Interior Point Solver -- MIPS, Version 1.2, 20-Mar-2015
 (using built-in linear solver)
Converged!

Converged in 0.08 seconds
Objective Function Value = 5205.49 $/hr
================================================================================
|     System Summary
    |
================================================================================

How many?                How much?              P (MW)            Q (MVAr)
---------------------    -------------------  -------------
 -----------------
Buses             14     Total Gen Capacity     772.4         -52.0 to 148.0
Generators         5     On-line Capacity       772.4         -52.0 to 148.0
Committed Gens     5     Generation (actual)    192.3              60.5
Loads             11     Load                   185.3              75.0
  Fixed           11       Fixed                185.3              75.0
  Dispatchable     0       Dispatchable          -0.0 of -0.0      -0.0
Shunts             1     Shunt (inj)             -0.0              21.0
Branches          20     Losses (I^2 * Z)         7.02             31.08
Transformers       3     Branch Charging (inj)     -               24.5
Inter-ties         0     Total Inter-tie Flow     0.0               0.0
Areas              1

                          Minimum                      Maximum
                 -------------------------  --------------------------------
Voltage Magnitude   0.986 p.u. @ bus 14         1.060 p.u. @ bus 1
Voltage Angle     -16.33 deg   @ bus 14         0.00 deg   @ bus 1
P Losses (I^2*R)             -                  1.90 MW    @ line 1-2
Q Losses (I^2*X)             -                  6.60 MVAr  @ line 1-5
Lambda P           33.95 $/MWh @ bus 1         39.88 $/MWh @ bus 14
Lambda Q           -0.04 $/MWh @ bus 1          1.36 $/MWh @ bus 14

================================================================================
|     Bus Data
    |
================================================================================
 Bus      Voltage          Generation             Load
 Lambda($/MVA-hr)
  #   Mag(pu) Ang(deg)   P (MW)   Q (MVAr)   P (MW)   Q (MVAr)     P
 Q
----- ------- --------  --------  --------  --------  --------  -------
 -------
    1  1.060    0.000*   162.05      0.00       -         -      33.946
 -0.039
    2  1.044   -3.249     30.27     19.08     21.70     12.70    35.134
-
    3  1.030   -6.530      0.00     21.17     20.50     20.50    36.163
-
    4  1.019   -7.400       -         -       47.80     -3.90    36.687
0.084
    5  1.019   -6.509       -         -        7.60      1.60    36.351
0.174
    6  1.060  -12.528      0.00     15.08     11.20      7.50    36.540
-
    7  1.051  -10.215       -         -         -         -      36.600
0.064
    8  1.060  -10.215      0.00      5.20       -         -      36.600
-
    9  1.052  -11.682       -         -       29.50     16.60    36.555
0.098
   10  1.046  -12.120       -         -        9.00      5.80    36.742
0.211
   11  1.050  -12.448       -         -        3.50      1.80    36.744
0.169
   12  1.041  -13.646       -         -        6.10      1.60    37.278
0.286
   13  1.030  -13.885       -         -       13.50      5.80    37.779
0.551
   14  0.986  -16.328       -         -       14.90      5.00    39.885
1.359
                        --------  --------  --------  --------
               Total:    192.32     60.54    185.30     75.00

================================================================================
|     Branch Data
   |
================================================================================
Brnch   From   To    From Bus Injection   To Bus Injection     Loss (I^2 *
Z)
  #     Bus    Bus    P (MW)   Q (MVAr)   P (MW)   Q (MVAr)   P (MW)   Q
(MVAr)
-----  -----  -----  --------  --------  --------  --------  --------
 --------
   1      1      2    105.04     -5.89   -103.14      5.86     1.905
 5.81
   2      1      5     57.01      5.89    -55.41     -4.61     1.599
 6.60
   3      2      3     31.29     -1.59    -30.87     -1.34     0.422
 1.78
   4      2      4     44.27     -0.06    -43.23     -0.38     1.047
 3.18
   5      2      5     36.14      2.17    -35.45     -3.74     0.691
 2.11
   6      3      4     10.37      2.01    -10.30     -3.17     0.072
 0.18
   7      4      5    -34.86     10.93     35.04    -10.39     0.172
 0.54
   8      4      7     25.73     -4.01    -25.73      5.31     0.000
 1.31
   9      4      9     14.85      0.53    -14.85      0.58     0.000
 1.11
  10      5      6     48.23     17.14    -48.23    -11.62     0.000
 5.52
  11      6     11      1.48      4.74     -1.46     -4.69     0.021
 0.04
  12      6     12      9.95      3.19     -9.83     -2.94     0.119
 0.25
  13      6     13     25.60     11.28    -25.13    -10.37     0.461
 0.91
  14      7      8     -0.00     -5.16      0.00      5.20    -0.000
 0.04
  15      7      9     25.73     -0.15    -25.73      0.81    -0.000
 0.66
  16      9     10     11.09      3.03    -11.05     -2.93     0.038
 0.10
  17      9     14      0.00      0.00      0.00      0.00     0.000
 0.00
  18     10     11      2.05     -2.87     -2.04      2.89     0.009
 0.02
  19     12     13      3.73      1.34     -3.70     -1.32     0.032
 0.03
  20     13     14     15.33      5.88    -14.90     -5.00     0.434
 0.88
                                                             --------
 --------
                                                    Total:     7.022
31.08

================================================================================
|     Voltage Constraints
   |
================================================================================
Bus #  Vmin mu    Vmin    |V|   Vmax    Vmax mu
-----  --------   -----  -----  -----   --------
    1      -      0.940  1.060  1.060   321.034
    6      -      0.940  1.060  1.060   133.465
    8      -      0.940  1.060  1.060    38.400

================================================================================
|     Generation Constraints
    |
================================================================================
 Gen   Bus                  Active Power Limits
  #     #     Pmin mu     Pmin       Pg       Pmax    Pmax mu
----  -----   -------   --------  --------  --------  -------
   3     3      3.837      0.00      0.00    100.00      -
   4     6      3.460      0.00      0.00    100.00      -
   5     8      3.400      0.00      0.00    100.00      -

 Gen   Bus                 Reactive Power Limits
  #     #     Qmin mu     Qmin       Qg       Qmax    Qmax mu
----  -----   -------   --------  --------  --------  -------
   1     1      0.039      0.00      0.00     10.00      -

MATPOWER Version 5.1, 20-Mar-2015 -- AC Optimal Power Flow
MATLAB Interior Point Solver -- MIPS, Version 1.2, 20-Mar-2015
 (using built-in linear solver)
Converged!

Converged in 0.07 seconds
Objective Function Value = 5205.49 $/hr
================================================================================
|     System Summary
    |
================================================================================

How many?                How much?              P (MW)            Q (MVAr)
---------------------    -------------------  -------------
 -----------------
Buses             14     Total Gen Capacity     772.4         -52.0 to 148.0
Generators         5     On-line Capacity       772.4         -52.0 to 148.0
Committed Gens     5     Generation (actual)    192.3              60.5
Loads             11     Load                   185.3              75.0
  Fixed           11       Fixed                185.3              75.0
  Dispatchable     0       Dispatchable          -0.0 of -0.0      -0.0
Shunts             1     Shunt (inj)             -0.0              21.0
Branches          20     Losses (I^2 * Z)         7.02             31.08
Transformers       3     Branch Charging (inj)     -               24.5
Inter-ties         0     Total Inter-tie Flow     0.0               0.0
Areas              1

                          Minimum                      Maximum
                 -------------------------  --------------------------------
Voltage Magnitude   0.986 p.u. @ bus 14         1.060 p.u. @ bus 1
Voltage Angle     -16.33 deg   @ bus 14         0.00 deg   @ bus 1
P Losses (I^2*R)             -                  1.90 MW    @ line 1-2
Q Losses (I^2*X)             -                  6.60 MVAr  @ line 1-5
Lambda P           33.95 $/MWh @ bus 1         39.88 $/MWh @ bus 14
Lambda Q           -0.04 $/MWh @ bus 1          1.36 $/MWh @ bus 14

================================================================================
|     Bus Data
    |
================================================================================
 Bus      Voltage          Generation             Load
 Lambda($/MVA-hr)
  #   Mag(pu) Ang(deg)   P (MW)   Q (MVAr)   P (MW)   Q (MVAr)     P
 Q
----- ------- --------  --------  --------  --------  --------  -------
 -------
    1  1.060    0.000*   162.05      0.00       -         -      33.946
 -0.039
    2  1.044   -3.249     30.27     19.08     21.70     12.70    35.134
-
    3  1.030   -6.530      0.00     21.17     20.50     20.50    36.163
-
    4  1.019   -7.400       -         -       47.80     -3.90    36.687
0.084
    5  1.019   -6.509       -         -        7.60      1.60    36.351
0.174
    6  1.060  -12.528      0.00     15.08     11.20      7.50    36.540
-
    7  1.051  -10.215       -         -         -         -      36.600
0.064
    8  1.060  -10.215      0.00      5.20       -         -      36.600
-
    9  1.052  -11.682       -         -       29.50     16.60    36.555
0.098
   10  1.046  -12.120       -         -        9.00      5.80    36.742
0.211
   11  1.050  -12.448       -         -        3.50      1.80    36.744
0.169
   12  1.041  -13.646       -         -        6.10      1.60    37.278
0.286
   13  1.030  -13.885       -         -       13.50      5.80    37.779
0.551
   14  0.986  -16.328       -         -       14.90      5.00    39.885
1.359
                        --------  --------  --------  --------
               Total:    192.32     60.54    185.30     75.00

================================================================================
|     Branch Data
   |
================================================================================
Brnch   From   To    From Bus Injection   To Bus Injection     Loss (I^2 *
Z)
  #     Bus    Bus    P (MW)   Q (MVAr)   P (MW)   Q (MVAr)   P (MW)   Q
(MVAr)
-----  -----  -----  --------  --------  --------  --------  --------
 --------
   1      1      2    105.04     -5.89   -103.14      5.86     1.905
 5.81
   2      1      5     57.01      5.89    -55.41     -4.61     1.599
 6.60
   3      2      3     31.29     -1.59    -30.87     -1.34     0.422
 1.78
   4      2      4     44.27     -0.06    -43.23     -0.38     1.047
 3.18
   5      2      5     36.14      2.17    -35.45     -3.74     0.691
 2.11
   6      3      4     10.37      2.01    -10.30     -3.17     0.072
 0.18
   7      4      5    -34.86     10.93     35.04    -10.39     0.172
 0.54
   8      4      7     25.73     -4.01    -25.73      5.31     0.000
 1.31
   9      4      9     14.85      0.53    -14.85      0.58     0.000
 1.11
  10      5      6     48.23     17.14    -48.23    -11.62     0.000
 5.52
  11      6     11      1.48      4.74     -1.46     -4.69     0.021
 0.04
  12      6     12      9.95      3.19     -9.83     -2.94     0.119
 0.25
  13      6     13     25.60     11.28    -25.13    -10.37     0.461
 0.91
  14      7      8     -0.00     -5.16      0.00      5.20    -0.000
 0.04
  15      7      9     25.73     -0.15    -25.73      0.81    -0.000
 0.66
  16      9     10     11.09      3.03    -11.05     -2.93     0.038
 0.10
  17      9     14      0.00      0.00      0.00      0.00     0.000
 0.00
  18     10     11      2.05     -2.87     -2.04      2.89     0.009
 0.02
  19     12     13      3.73      1.34     -3.70     -1.32     0.032
 0.03
  20     13     14     15.33      5.88    -14.90     -5.00     0.434
 0.88
                                                             --------
 --------
                                                    Total:     7.022
31.08

================================================================================
|     Voltage Constraints
   |
================================================================================
Bus #  Vmin mu    Vmin    |V|   Vmax    Vmax mu
-----  --------   -----  -----  -----   --------
    1      -      0.940  1.060  1.060   321.034
    6      -      0.940  1.060  1.060   133.465
    8      -      0.940  1.060  1.060    38.400

================================================================================
|     Generation Constraints
    |
================================================================================
 Gen   Bus                  Active Power Limits
  #     #     Pmin mu     Pmin       Pg       Pmax    Pmax mu
----  -----   -------   --------  --------  --------  -------
   3     3      3.837      0.00      0.00    100.00      -
   4     6      3.460      0.00      0.00    100.00      -
   5     8      3.400      0.00      0.00    100.00      -

 Gen   Bus                 Reactive Power Limits
  #     #     Qmin mu     Qmin       Qg       Qmax    Qmax mu
----  -----   -------   --------  --------  --------  -------
   1     1      0.039      0.00      0.00     10.00      -
In an assignment  A(:) = B, the number of elements in A and B must be the
same.



>> my main objective is i require a load curve with different loads during
different periods and for different periods the price should be different.

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