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662 BUS: Power systems admittance matrices
Power system networks

from set PSADMIT, from the Harwell-Boeing Collection

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Visualizations

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Matrix Statistics

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Size Type
662 x 662, 1568 entries real symmetric indefinite symmetric positive definite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
2474 662 906 906 0
Column Data Row Data
Average nonzeros per column : 3.7
Standard deviation : 1.5

indexnonzeros
longest385 10
shortest35 2

Average nonzeros per row : 3.7
Standard deviation : 1.5

indexnonzeros
longest385 10
shortest35 2

Bandwidths Profile Storage
lower336 upper336
average |i-j|55 std.dev.69
minmaxave.std.dev.
lower bandwidth1 336 69 80
upper bandwidth1 336 69 80

Symmetric skyline storage requirement:45827

Heaviest diagonals
offset from main0 -1 1 -2 2 -5 5 -3 3 -7
nonzeros662 65 65 19 19 16 16 15 15 12
accumulated percent26.7629.3932.0132.7833.5534.2034.8435.4536.0536.54

Top 10 out of 463 nonvoid diagonals.
Conditioning
Frobenius norm7.4e+03 condition number (est.)8.3e+05
2-norm (est.)4e+03 diagonal dominanceno


Set Information

Set PSADMIT
Source: Dan Tylavsky, Arizona State University
Discipline:Power system networks
Accession:Summer 1985


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Last change in this page: Wed Sep 22 13:33:49 US/Eastern 2004 [Comments: ]