Improved Firefly Algorithm: A Novel Method for Optimal Operation of Thermal Generating Units

Table 12

The comparison of costs (in $/h) for Subcase 5.2.

Method	Best cost ($)	Mean cost ($)	Worst cost ($)		BCI (%)
ICSA [16]	623.8684	623.9495	626.3666	12,000	−0.0013
CCDE [13]	623.8288	623.8574	623.8904	7000	−0.0077
CSA [15]	623.8684	623.9495	626.3666	10,000	−0.0013
DSPSO-TSA [19]	623.8375	623.8625	623.9001	3000	−0.0063
PSO [19]	624.3045	624.5054	625.9252	3000	0.0685
GA [19]	624.505	624.7419	624.8169	3000	0.1006
TSA [19]	624.3078	635.0623	624.8285	3000	0.0690
KHA1 [23]	611.3276	613.0895	614.8293	10,000	−2.0528
KHA2 [23]	609.0768	610.3271	611.2105	10,000	−2.4299
KHA3 [23]	607.5437	608.1164.	608.5431	10,000	−2.6884
KHA4 [23]	605.7582	605.8043	605.9426	10,000	−2.9911
FA	664.5306	675.5344	679.426	2000	6.1177
IFA	623.8768	625.2704	629.2765	1000