Method for controlling an electricity distribution grid at a consumption point of the electricity grid, the consumption point being able to manage an electrical load connected to the electricity grid, the method comprising: - a step of measuring electrical voltages at the consumption point, - a step (42, 43) of estimating, at the consumption point, variables which are representative of a state of equilibrium of the electricity grid from the measured electrical voltages, the representative variables comprising the frequency (f) and the time-frequency variation (df/dt) of the electricity grid as well as the difference (ΔP) between the electrical power produced and the electrical power consumed in the electricity grid, the estimation step first estimating the frequency (f) of the electricity grid from the voltages measured at the consumption point and estimating the frequency variation (df/dt) of the electricity grid, - a command step during which the electricity consumption of the electrical load is modified when the estimated representative variables are outside a predetermined operating range, characterized in that: - the estimation step estimates, in real time, the difference (ΔP) between electrical power produced and electrical power consumed using an extended Kalman filter, of which one of the state variables is a calibration parameter (α) representing the inertia of the electricity grid, - the control method comprises a periodic recalibration step during which the calibration parameter (α) is periodically updated by communication between the consumption point and an electricity grid operator and during which information (ΔP predicted) predicting a deviation between power produced and power consumed is provided by the electricity grid operator and is used in the command step in order to determine the predetermined operating range. - a step of measuring electrical voltages at the consumption point, - a step (42, 43) of estimating, at the consumption point, variables which are representative of a state of equilibrium of the electricity grid from the measured electrical voltages, the representative variables comprising the frequency (f) and the time-frequency variation (df/dt) of the electricity grid as well as the difference (ΔP) between the electrical power produced and the electrical power consumed in the electricity grid, the estimation step first estimating the frequency (f) of the electricity grid from the voltages measured at the consumption point and estimating the frequency variation (df/dt) of the electricity grid, - a command step during which the electricity consumption of the electrical load is modified when the estimated representative variables are outside a predetermined operating range, characterized in that: - the estimation step estimates, in real time, the difference (ΔP) between electrical power produced and electrical power consumed using an extended Kalman filter, of which one of the state variables is a calibration parameter (α) representing the inertia of the electricity grid, - the control method comprises a periodic recalibration step during which the calibration parameter (α) is periodically updated by communication between the consumption point and an electricity grid operator and during which information (ΔP predicted) predicting a deviation between power produced and power consumed is provided by the electricity grid operator and is used in the command step in order to determine the predetermined operating range. - the estimation step estimates, in real time, the difference (ΔP) between electrical power produced and electrical power consumed using an extended Kalman filter, of which one of the state variables is a calibration parameter (α) representing the inertia of the electricity grid, - the control method comprises a periodic recalibration step during which the calibration parameter (α) is periodically updated by communication between the consumption point and an electricity grid operator and during which information (ΔP predicted) predicting a deviation between power produced and power consumed is provided by the electricity grid operator and is used in the command step in order to determine the predetermined operating range.