Matrix: QY/case9

Description: Transient stabilty constrained interior pt. optimal power flow, J. Quanyuan

QY/case9 graph
(undirected graph drawing)


QY/case9 dmperm of QY/case9
scc of QY/case9

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  • Matrix group: QY
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  • download as a MATLAB mat-file, file size: 10 MB. Use UFget(2214) or UFget('QY/case9') in MATLAB.
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    Matrix properties
    number of rows14,454
    number of columns14,454
    nonzeros147,972
    structural full rank?yes
    structural rank14,454
    # of blocks from dmperm2
    # strongly connected comp.2
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?no
    positive definite?no

    authorJ. Quanyuan
    editorT. Davis
    date2008
    kindpower network problem sequence
    2D/3D problem?no

    Additional fieldssize and type
    bsparse 14454-by-1
    Acell 12-by-1
    b1cell 12-by-1
    b2cell 12-by-1

    Notes:

    Transient stabilty constrained interior pt. optimal power flow, J. Quanyuan
    Two problem sets from Dr. Jiang Quanyuan from Zhejiang University,         
    Hangzhou, China, March, 2008, used in an electrical power system.          
    Each matrix A is solved sequentially with two right-hand-sides, b1 and     
    b2, one at a time.  In the UF collection, the sequence of all first        
    and second right-hand-sides is in Problem.aux.b2 and Problem.aux.b1.       
    These matrices are symmetric indefinite (x=A\b uses MA57)                  
    Note that the last matrices in the sequence are ill-conditioned.           
                                                                               
    Transient Stability Constrained Interior Point Optimal Power Flow Program  
          Version 1.0 -- Developed by Dr. Jiang Quanyuan, March 2008           
                                                                               
    case9.m - TSOPF converges after 12 iterations                              
     object    = 3.945939E+03                                                  
     max_equ   = 3.287326E-11                                                  
     low_inequ = None                                                          
     up_inequ  = None                                                          
    

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD178,786
    Cholesky flop count2.6e+06
    nnz(L+U), no partial pivoting, with AMD343,118
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD591,437
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD42,799,020

    SVD-based statistics:
    norm(A)5306.19
    min(svd(A))6.37429e-09
    cond(A)8.32437e+11
    rank(A)14,444
    sprank(A)-rank(A)10
    null space dimension10
    full numerical rank?no
    singular value gap1.22581

    singular values (MAT file):click here
    SVD method used:s = svd (full (A)) ;
    status:ok

    QY/case9 svd

    For a description of the statistics displayed above, click here.

    Maintained by Tim Davis, last updated 12-Mar-2014.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.