Stochastic Optimization for Network-Constrained Power System Scheduling Problem

Table 6

Comparison of loss approximation methods.

	Number of variables	Number of constraints	Error [%]	Number of iterations	CPU time [sec]	Cost increment [%]
Without network const. & losses	984	2574	—	—	1.70	—
Iterative	1284	3894	0	5	2.31	11.74
Piecewise-4 seg.	4440	12117	27.01	—	8.06	12.49
Piecewise-6 seg.	5784	15798	12.80	—	16.56	12.01
Piecewise-10 seg.	8472	22947	4.92	—	26.83	11.69
Piecewise-14 seg.	11160	30513	2.47	—	39.12	11.61