Generation in PQ bus
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
Jacobian matrix
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. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
Re: Question about LMP
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. mailto:victor.hinoj...@usm.cl>> 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 --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
Effective line (bearing a flow exceeding 90% of its normal rate)
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. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
Jacobian matrix of 5 bus system
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. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com
RTS-96 Test System in matpower format
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! --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com
Re: RTS-96 Test System in matpower format
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 EspaƱa SL Grupo AIA On Mon, Apr 20, 2015 at 7:59 PM, Kanis <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! --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com