Method for determining at least one power limit of a hybrid drive train for a transport vehicle, in particular an aircraft

A method for determining at least one minimum power margin of a hybrid drive train for an aircraft, the hybrid drive train comprising a plurality of power sources of different natures, a plurality of power consumers and a plurality of drive elements, each of the plurality of drive elements being associated with at least one of the plurality of power sources and at least one of the plurality of power consumers, the method comprising:

• acquiring measurements of a plurality of power parameters of the hybrid drive train using a calculator, at least two of the measurements being expressed according to different units of measure,
• comparing each of the measurements with at least one limitation threshold, determined respectively for each of the plurality of power parameters from a threshold database using the calculator, in order to deduce therefrom at least one gross power margin for each of said plurality of power parameters,
• converting from a transformation database including a transformation ratio database, the at least one gross power margin of said plurality of power parameters into refined power margins expressed according to a same common unit of measure using the calculator,
• transposing from a yield database, the refined power margins into standardized power margins at an at least one reference point of the hybrid drive train using the calculator, the yield database storing predetermined yield ratios for a plurality of transmission members including at least an electric generator configured to convert mechanical power from a turbogenerator to electrical power, at least one rectifier configured to convert alternating current to direct current, at least one electrical channel configured to transport electrical power, at least one inverter configured to convert direct current to alternating current, and at least one electric motor configured to convert electrical power to mechanical power, wherein the yield database determines yields of the plurality of transmission members that are between an acquisition point and the at least one reference point by multiplying the predetermined yield ratios of the plurality of transmission members that are between the acquisition point and the at least one reference point,
• determining a source power margin, from the standardized power margins of the plurality of power sources at said at least one reference point, and a consumer power margin, from the standardized power margins of the plurality of power consumers at said reference point using the calculator,
• determining the minimum power margin by selecting a lowest power margin between the consumer power margin and the source power margin at said at least one reference point using the calculator, and
• controlling the plurality of transmission members of the hybrid drive train for the aircraft based on the selected lowest power margin.