A Hybrid Search Algorithm for Midterm Optimal Scheduling of Thermal Power Plants

Table 2

Comparison of three methods for two typical months.

	May				September
	Heuristic	VSA	LSA	HSA	Heuristic	VSA	LSA	HSA
Operating hours of installed capacity (h)
Plant 1	475.2	484.8	499.2	499.2	264	288	288	288
Plant 2	499.2	499.2	499.2	499.2	304	284.8	284.8	288
Plant 3	475.2	499.2	499.2	499.2	244.8	278.4	292.8	288
Plant 4	499.2	499.2	499.2	499.2	268.8	282.2	282.2	288
Plant 5	489.6	499.2	499.2	499.2	288	288	288	288
Plant 6	499.2	499.2	499.2	499.2	288	288	288	288
Plant 7	499.2	499.2	499.2	499.2	288	288	288	288
Plant 8	489.6	499.2	499.2	499.2	288	288	288	288
Plant 9	480	480	480	499.2	268.8	288	288	288
Average (h)	489.6	495.5	497.1	499.2	278.04	285.9	287.5	288
Max-min difference (h)	24	19.2	19.2	0	59.2	9.6	10.6	0
Objective value (h2)	97.28	50.06	36.4	0	282.61	10.81	7.17	0