A method for determining parameters for controlling N electric generators at an instant t, the method including, for a required power Ptot(t)=Σi=1NPi(t) at an instant t with Pi(t) the electric power supplied by the electric generator i at the instant t and a reserve power Preserve(t)≤Σi=1N(Pimax−Pi(t)×δi(t) at an instant t with Pimax the maximum power that the electric generator i can develop and δi(t) the coefficient of activation of the electric generator i which is equal to 1 when the electric generator is on and 0 when the electric generator is off, a step of determining the optimal power Piopt(t) at the instant t associated with each electric generator i so as to minimise the fuel consumption per unit of electrical energy produced sfc ⁡ ( t ) = 1 P tot ⁡ ( t ) ⁢ ∑ i = 1 N ⁢ f i ⁡ ( P i ⁡ ( t ) ) × P i ⁡ ( t ) with fi(x) the function giving the fuel consumption of the electric generator i for the electric power x.