Matrix: IPSO/HTC_336_4438

Description: Power simulation matrix, Li Peijie, Inst. of Power Systems, Guangxi Univ.

IPSO/HTC_336_4438 graph
(undirected graph drawing)


IPSO/HTC_336_4438 dmperm of IPSO/HTC_336_4438
scc of IPSO/HTC_336_4438

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  • Matrix group: IPSO
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  • download as a MATLAB mat-file, file size: 2 MB. Use UFget(2534) or UFget('IPSO/HTC_336_4438') in MATLAB.
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  • download in Rutherford/Boeing format, file size: 2 MB.

    Matrix properties
    number of rows226,340
    number of columns226,340
    nonzeros783,496
    structural full rank?yes
    structural rank226,340
    # of blocks from dmperm29,588
    # strongly connected comp.14,796
    explicit zero entries121,026
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?no
    positive definite?no

    authorL. Peijie
    editorJ. Hogg
    date2011
    kindpower network problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 226340-by-1

    Notes:

    Three different kinds of optimization methods (OPF, TSCOPF, HTC)
    applied to power system simulation.  All matrices are symmetric 
    indefinite.  From Li Peijie, Institute of Power Systems,        
    Guangxi University (beyondpeijie at gxu.edu.cn).  Collected by  
    Jonathan Hogg, Rutherford Appleton Laboratory, Oxfordshire, UK. 
    

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD1,119,531
    Cholesky flop count5.7e+07
    nnz(L+U), no partial pivoting, with AMD2,012,722
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD40,953,261
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD93,401,877

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 121026 explicit zero entries.

    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.