Ducted bidirectional tidal current power station system

A ducted bidirectional tidal current power station system, mainly consisting of a bidirectional tidal current power generation device, a dam, an open sea, an inland sea, a duct, and an opening/closing gate;

• wherein the bidirectional tidal current power generation device is installed in the duct on the bottom of the dam;
• and openings, respectively communicated with the open sea and the inland sea, are formed at two ends of the duct, and an opening/closing gate is arranged at each of the two openings;
• wherein the bidirectional tidal current power generation device comprises an impeller, a rotor, a stator, a rear guide base, a front guide base, a cylindrical roller, a thrust roller and an electrical control system;
• the impeller is arranged on a periphery of the rotor;
• the rotor, as a shaftless structure, is rotatably installed between the front guide base and the rear guide base by the cylindrical roller and the thrust roller;
• the front guide base and the rear guide base are fixedly installed in the duct radial loads and axial loads generated by the impeller and the rotor are transferred to the front guide base and the rear guide base by the cylindrical roller and the thrust roller;
• and the stator is installed between the front guide base and the rear guide base and located inside the rotor;
• the electrical control system comprises a master controller, a current transformer, a power generator side switch, and a power grid side switch;
• each of the current transformer, the power generator side switch and the power grid side switch is connected to the master controller;
• each of the power generator side switch and the power grid side switch is connected to the current transformer;
• and, the power generator side switch is connected to a leading out wire of the stator of the bidirectional tidal current power generation device, and the power grid side switch is connected to a power grid;
• and
• the electrical control system further comprises a Hall sensor, a frequency converter, an electrically-driving grid side switch and an electromotor side switch;
• each of the frequency converter, the electrically-driving grid side switch and the electromotor side switch is connected to the master controller;
• the Hall sensor is connected to the frequency converter;
• each of the electrically-driving grid side switch and the electromotor side switch is connected to the frequency converter;
• and, the electromotor side switch is connected to the leading out wire of the stator of the bidirectional tidal current power generation device, and the electrically-driving grid side switch is connected to the power grid.