The purpose of the present invention is to provide gas turbine power generation equipment capable of suppressing missteps when an instantaneous voltage drop or other grid accident has occurred, in a local grid having naturally fluctuating power generation equipment and gas turbine power generation equipment. The gas turbine power generation equipment (10) supplies power together with naturally fluctuating power generation equipment (30), in a local grid (50) connected to a power grid (7), and comprises: a fuel flow rate adjustment valve (201) that adjusts the flow rate for fuel supplied to a combustor (2); an air bleed valve (105) and an intake flow rate adjustment valve (100) that adjust the flow rate for compressed air compressed by a compressor (1) and supplied to the combustor (2); and a control device (400) that, when the voltage of the power grid has dropped to below a threshold value (V(t)), instantaneously reduces at least either the fuel flow rate or the compressed air flow rate and instantaneously restores same after a prescribed period has passed, by outputting control signals to the fuel flow rate adjustment valve (201), the air bleed valve (105), or the intake flow rate adjustment valve (100).