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494 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
494 x 494, 1080 entries real symmetric indefinite symmetric positive definite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
1666 494 586 586 0
Column Data Row Data
Average nonzeros per column : 3.4
Standard deviation : 1.4

indexnonzeros
longest457 10
shortest2 2

Average nonzeros per row : 3.4
Standard deviation : 1.4

indexnonzeros
longest457 10
shortest2 2

Bandwidths Profile Storage
lower429 upper429
average |i-j|69 std.dev.1.1e+02
minmaxave.std.dev.
lower bandwidth1 429 84 1.2e+02
upper bandwidth1 429 84 1.2e+02

Symmetric skyline storage requirement:41469

Heaviest diagonals
offset from main0 -1 1 -2 2 -3 3 -4 4 -5
nonzeros494 95 95 44 44 34 34 29 29 16
accumulated percent29.6535.3541.0643.7046.3448.3850.4252.1653.9054.86

Top 10 out of 465 nonvoid diagonals.
Conditioning
Frobenius norm5.8e+04 condition number (est.)3.9e+06
2-norm (est.)3e+04 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: ]