Generation in PQ bus

[kanis kanis]

Dear all,

Is it possible to put a negative number for real power demand in a PQ bus
so as to consider it as a fixed active power generation? Can you tell me
please if it can be done also for a PQ bus in an IGM file?

Thank you in advance
Greg

Effective line (bearing a flow exceeding 90% of its normal rate)

[Kanis Kanis]

Hi everybody,

has  anybody bibliography about the subject that
a line which power flow exceeds 90% of its normal rate is effective?

Thanks in advance.


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Re: Question about LMP

[Kanis Kanis]

Dear all,

I would like to ask something more about LMPs. Is there any function 
like DCOPF that incorporates the impact of losses in
the calculation of LMPs, like the models (that are now applied in PJM, 
NYISO etc.) which explicitly balance the losses in the energy balance 
equation?


Thank for your comments.

Regards Gregory.




On 11/19/2015 6:12 AM, Jovan Ilic wrote:


Dear Victor,

If there is no congestion in the network, there is the same LMP at all 
the nodes.

The LMP consists of loss, congestion, and energy costs. DCOPF has no
losses, and if there is no congestion only the energy cost is 
accounted for.
You can think of it as if since there is no congestion or loss cost 
the energy can

be distributed to all nodes at the same price.

Regards,
Jovan Ilic

On Wed, Nov 18, 2015 at 4:37 PM, Victor Hugo Hinojosa M. 
> wrote:


Dear Prof. Zimmerman,

I have a question about Local Marginal Prices (LMP) that are shown in
Matpower.

The definition of the LMP is the marginal cost of supplying, at
least cost,
the next increment of electric demand at a specific location
(node) on the
electric power network, taking into account both supply
(generation/import)
bids and demand (load/export) offers and the physical aspects of the
transmission system including transmission and other operational
constraints.

When it is performed a DCOPF, Matpower shows LMP for each bus
considering
the marginal cost (energy cost) and the congestion cost so that
I'd like to
know why the generation constraints (maximum and minimum power) aren't
considered in the LMP.

Thank you so much for your ideas and comments.

Regards,

Vh







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Jacobian matrix

[Kanis Kanis]

Hello,
the Jacobian matrix from full(makeJac) function is a matrix which 
elements are placed, all PV buses before PQ buses for the real power 
rows and voltage angle columns. Is there any way to reform the matrix in 
a (n-1+m)x(n-1+m) matrix, where n the number of buses and m the number 
of PQ buses;


Thanks in advance for your interest.


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Re: RTS-96 Test System in matpower format

[kanis]

Thank you both so much for the help. That is what i needed.

All the best.

On 4/21/2015 11:02 AM, Jose Luis Marin wrote:


I found a copy here: 
http://www.mail-archive.com/matpower-l@cornell.edu/msg01301.html


But I don't know if it really matches the actual RTS-96 data (see 
http://www.ee.washington.edu/research/pstca/rts/pg_tcarts.htm). If you 
get to analyze it in detail, could you please share the details here?


Regards,

--
Jose L. Marin
Gridquant España SL
Grupo AIA


On Mon, Apr 20, 2015 at 7:59 PM, Kanis kaniskanis...@gmail.com 
mailto:kaniskanis...@gmail.com wrote:


Hi, i would like to ask if someone has  RTS-96 Test System in
matpower format. A link

http://www.parallelcoding.com/wp-content/uploads/Research/MCSPruning/case96.m
that is suggested in a previous conversation is not working.

Thanks in advance for your interest!

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RTS-96 Test System in matpower format

[Kanis]

Hi, i would like to ask if someone has  RTS-96 Test System in matpower 
format. A link 
http://www.parallelcoding.com/wp-content/uploads/Research/MCSPruning/case96.m 
that is suggested in a previous conversation is not working.


Thanks in advance for your interest!

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Jacobian matrix of 5 bus system

[Kanis]

Hello,
i have the following test case and i'm trying to find the Jacobian 
matrix of NR method using the /makeJac/ function of matpower and a code 
that i have implemented in matlab.
However, the results between the two methods, which are attached below, 
are different and i think that my code shows the correct Jacobian. Can 
you please tell me if i implement wrong /makeJac /function. I write 
mpc=case5_v1; makeJac(mpc);



function mpc = case5_v1
mpc.version = '2';
%% system MVA base
mpc.baseMVA = 100;

%% bus data
%   bus_i   typePd  Qd  Gs  Bs  area Vm  
Va baseKV  zoneVmaxVmin

mpc.bus = [
1   3   0   0   0   0   1 1   
0   230 1   1.1 0.9;
2   1   300 100 0   0   1 1   
0   230 1   1.1 0.9;
3   2   300 100 0   0   1 1   
0   230 1   1.1 0.9;
4   2   300 100 0   0   1 1   
0   230 1   1.1 0.9;
5   2   0   0   0   0   1 1   
0   230 1   1.1 0.9;

];

%% generator data
%   bus Pg  Qg  QmaxQminVg  mBase status  
PmaxPminPc1 Pc2 Qc1min  Qc1max  Qc2min Qc2max  ramp_agc  
ramp_10 ramp_30 ramp_q  apf

mpc.gen = [
1   0 0   30  -30 1   100 1
0 0   0   0   0   0   0 0   0   0   
0   0   0;
3   0 0   390 -3901   100 1
0 0   0   0   0   0   0 0   0   0   
0   0   0;
4   0 0   150 -1501   100 1
0 0   0   0   0   0   0 0   0   0   
0   0   0;
5   0 0   450 -4501   100 1
0 0   0   0   0   0   0 0   0   0   
0   0   0;

];

%% branch data
%   fbustbusr   x   b   rateA rateB   
rateC   ratio   angle   status  angmin  angmax

mpc.branch = [
1   2   0.00281 0.0281  0   999 999 999 
0   0   1   -360360;
1   4   0.00304 0.0304  0   999 999 999 
0   0   1   -360360;
1   5   0.00064 0.0064  0   999 999 999 
0   0   1   -360360;
2   3   0.00108 0.0108  0   999 999 999 
0   0   1   -360360;
3   4   0.00297 0.0297  0   999 999 999 
0   0   1   -360360;
4   5   0.00297 0.0297  0   240 240 240 
0   0   1   -360360;

];


*Results with matpower:*
  125.0125  -33.3367   0  -91.6758   -9.1676
  -33.3367   99.2424  -33.33670   0
0  -33.3367  188.0396  0 0
  -91.675800  126.9107   12.6911
9.1676 0 0  -12.6911  126.9107

*Results of my code:*
  126.9107  -91.6758  0  0   12.6911
  -91.6758  125.0125   -33.3367   0   -9.1676
 0-33.3367 99.2424  -33.3367   0
 0 0  -33.3367   188.0396  0
  -12.69119.1676  0 0 126.9107

Thank you in advance for your interest.




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