31results about How to "Achieve a smooth start" patented technology

The application discloses an alternating-current excitation device charging and discharging system and method for variable-speed pumped storage units and a medium. The system is provided with a charging and discharging circuit, so that the alternating-current excitation device only needs one charging and discharging circuit to realize the orderly charging and discharging operation of each power submodule, realizes the smooth starting and shutdown of the alternating-current excitation device, and reduces the hardware cost compared with the existing hardware scheme, reduces the volume of the excitation device, and effectively improves the economy, safety and stability of the system.