A method for controlling the combustion in a gas turbine of the type comprising at least one compressor, capable of compressing air introduced therein through an inlet duct, at least one combustion chamber, where said compressed air is mixed with a gaseous fuel coming from a supply duct, and at least one turbine, capable of transforming the energy of the gas coming from said combustion chamber into work energy which can be exploited for activating one or more operating machines, the method comprising: • measuring, by means of one or more probes situated in correspondence with said combustion chamber, the amplitude of the pressure oscillations inside the combustion chamber and the persistence time, defined also as cycle, of the same oscillations; • characterised by evaluating the behaviour under fatigue conditions of said combustion chamber, by constructing the Wohler curve from a series of tests for a certain material which forms said combustion chamber, for a predefined combustion frequency and for some amplitude levels of the measured pressure oscillations and determining the number of cycles associated to a 50% probability of breakage at said amplitude levels; • measuring the cumulative damage to said combustion chamber during functioning under fatigue conditions of said turbine by means of the Palmgren-Miner hypothesis, said Palmgren-Miner hypothesis being defined as: D = ∑ i = I k n i / N i wherein: D = cumulative damage; k = number of amplitude levels; N i = number of cycles necessary for reaching breakage at the i-th level of amplitude, deriving from said Wohler curve; n i is the number of cycles which have passed at the i-th level of amplitude; wherein the method further comprises the steps of • approximating, with an exponential regression f(x), said values of the amplitude levels measured, with x being said number of cycles N i; • calculating the inverse function g(x) of said exponential regression f(x) for determining said number of cycles N i as a function of the amplitude level; and • undertaking protection actions of said turbine if the cumulative damage value measured exceeds a predefined value. • measuring, by means of one or more probes situated in correspondence with said combustion chamber, the amplitude of the pressure oscillations inside the combustion chamber and the persistence time, defined also as cycle, of the same oscillations; • characterised by evaluating the behaviour under fatigue conditions of said combustion chamber, by constructing the Wohler curve from a series of tests for a certain material which forms said combustion chamber, for a predefined combustion frequency and for some amplitude levels of the measured pressure oscillations and determining the number of cycles associated to a 50% probability of breakage at said amplitude levels; • measuring the cumulative damage to said combustion chamber during functioning under fatigue conditions of said turbine by means of the Palmgren-Miner hypothesis, said Palmgren-Miner hypothesis being defined as: D = ∑ i = I k n i / N i wherein: D = cumulative damage; k = number of amplitude levels; N i = number of cycles necessary for reaching breakage at the i-th level of amplitude, deriving from said Wohler curve; n i is the number of cycles which have passed at the i-th level of amplitude; wherein the method further comprises the steps of wherein: D = cumulative damage; k = number of amplitude levels; N i = number of cycles necessary for reaching breakage at the i-th level of amplitude, deriving from said Wohler curve; n i is the number of cycles which have passed at the i-th level of amplitude; • approximating, with an exponential regression f(x), said values of the amplitude levels measured, with x being said number of cycles N i; • calculating the inverse function g(x) of said exponential regression f(x) for determining said number of cycles N i as a function of the amplitude level; and • undertaking protection actions of said turbine if the cumulative damage value measured exceeds a predefined value.