Method of operating a combined-cycle power plant

A method of operating a combined-cycle plant, essentially comprising a gas turbine, at least one generator and a steam circuit, this steam circuit essentially comprising a heat-recovery steam generator, at least one low-pressure and/or intermediate-pressure steam turbine and a high-pressure steam turbine, wherein, in the event of load shedding, at least one valve acting upstream of the high-pressure steam turbine is closed, wherein the gas turbine and the generator are uncoupled from the low-pressure and/or intermediate-pressure steam turbine in such a way that gas turbine and the generator go into isolated operation, wherein the speed of the uncoupled steam turbine is not greater than the speed of the gas turbine and the generator, wherein steam in the flow path of a reheater belonging to the heat-recovery steam generator expands freely through the low-pressure and/or intermediate-pressure steam turbine, and wherein this expansion does not cause the speed of the gas turbine and of the generator to exceed their protective speed.