In order to enhance the tracking performance of power generation equipment with respect to a load variation and increase the reliability of the power generation equipment, a dynamic characteristic model simulating the dynamic characteristics of a multi-shaft gas turbine is used to calculate an output prediction value of a first power generator in a case where a combustor is controlled so as to match the output of the first power generator to an output target value; on the basis of the output target value and the output prediction value of the first power generator, a first power generator output instruction value as an instruction value for the output from the first power generator to a power system and a second power generator output instruction value as an instruction value for the output from a second power generator to the power system are calculated; and the combustor is controlled on the basis of the first power generator output instruction value and a frequency convertor is controlled on the basis of the second power generator output instruction value.

The apparatus includes a wind turbine system for the collection of wind energy and the conversion thereof through staged-compression into highly compressed gas. The highly compressed gas is routed to a central tank, and then expanded into a plurality of concentric ring tanks, each storing gas at successively lower pressures. The cooling resulting from this expansion is utilized to cool hot compressed gas from an intermediate line of gas compressors, increasing the efficiency of the following compressors. This absorption of heat also improves the efficiency of the gas turbines driving electrical generators. The gas compressor in each wind turbine is located near ground level, and driven by a vertical shaft passing through the wind turbine support tower. One embodiment has conventional radially extending blades, and another embodiment has ducted blades to withstand higher winds. Both ground mounted and deep water adaptions for the wind turbines are disclosed.