transient optimal power flow, Reduced-Space. Guangchao Geng, Zhejiang Univ
Name TSOPF_RS_b678_c1
Matrix ID 2243
Num Rows 18,696
Num Cols 18,696
Nonzeros 4,396,289
Pattern Entries 4,396,289
Kind Power Network Problem
Symmetric No
Date 2009
Author G. Geng
Editor T. Davis
Structural Rank 18,696
Structural Rank Full true
Num Dmperm Blocks 221
Strongly Connect Components 221
Num Explicit Zeros 0
Pattern Symmetry 0.4%
Numeric Symmetry 0%
Cholesky Candidate no
Positive Definite no
Type real
SVD Statistics
Matrix Norm 1.512520e+05
Minimum Singular Value 2.494893e-05
Condition Number 6.062464e+09
Rank 18,696
sprank(A)-rank(A) 0
Null Space Dimension 0
Full Numerical Rank? yes
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Transient stability-constrained optimal power flow (TSOPF) problems from     
Guangchao Geng, Institute of Power System, College of Electrical Engineering,
Zhejiang University, Hangzhou, 310027, China.  (genggc AT gmail DOT com).    
Matrices in the  Full-Space (FS) group are symmetric indefinite, and are best
solved with MA57.  Matrices in the the Reduced-Space (RS) group are best     
solved with KLU, which for these matrices can be 10 times faster than UMFPACK
or SuperLU.