Magnetic-gas composite thrust control system and method for organic Rankine cycle generator set

The invention discloses a magnetic-gas composite thrust control system and method for an organic Rankine cycle generator set, and relates to the technical field of organic Rankine cycle generator sets. The problems that a conventional organic Rankine cycle generator set needs to be provided with an oil system and a mechanical seal and the axial force of a magnetic suspension organic Rankine cycle unit is difficult to control are solved. The turbine-generator high-speed direct drive is adopted, the magnetic suspension bearing is adopted, a reduction gearbox, an oil system, a mechanical seal or a dry gas seal and the like are thoroughly omitted, and lubricating oil in the system is thoroughly eliminated; a balance hole is formed in the impeller, and an axial balance seal is arranged on the back of the impeller to control the axial force value of the centripetal turbine; by adopting a magnetic-gas combined thrust control system and algorithm, the size and load of the magnetic suspension thrust bearing are reduce