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Table 5 Numerical properties of the coefficient matrix with traditional measurements

From: An efficient method to include equality constraints in branch current distribution system state estimation

Method Coefficient matrix Coefficient matrix Condition
  density (%) size number
VM a 3.09 451 × 451 5.75 · 106
LM 1.40 689 × 689 2.26 · 104
SVR 20.56 213 × 213 5.41 · 103
  1. aWeight used for the virtual measurements = 1010.