Method and system for controlling a fuel flow to a turbomachine

Method of controlling a fuel flow to a turbomachine and turbine control system. The turbine control system (190) receives a plurality of operating data. The turbine control system (190) utilizes at least one algorithm, which applies an energy balance to the received operating data. The operating data may include, but is not limited to, airflow data, data from the fuel system (160), data related to the shaft work, exhaust data, and data related to the heat loss. This energy balance is used to determine the required mass flow rate.