Table 2.

Computation time (ms) for evaluating the Jacobian matrix for the 4-bus test system.

	${\mathbb{J}}_{\mathit{exact}}$	${\mathbb{J}}_{\mathit{proposed}}$	${\mathbb{J}}_{\mathit{approx}}$
Mean	0.6579	0.6423	7.4060
Minimum	0.6401	0.6250	7.278
Maximum	1.0095	0.9900	8.4856