公开(公告)号：US20190089279A1

公开(公告)日：2019-03-21

申请号：US16126110

申请日：2018-09-10

Applicant: General Electric Company

Inventor： Yunjie GU ,  Yuxiang WANG ,  Jiao LIU ,  Zhuohui TAN ,  David SMITH ,  Wei REN ,  Wuhua LI

IPC: H02P9/10 ,  H02P9/00 ,  H02P9/02 ,  F03D9/25

Abstract: The present invention discloses a power generation system including a double-fed induction generator, a power converter, and a controller. The double-fed induction generator includes a rotor and a stator coupled to a grid. The power converter includes a rotor side converter coupled to the rotor of the generator, a grid side converter coupled to the grid, and a DC bus coupled between the rotor side converter and the grid side converter. The controller includes a rotor side controller for controlling the rotor side converter and a grid side controller for controlling the grid side converter. The rotor side controller includes a compensator having a transfer function and configured to counter a negative resistance effect of the generator to suppress sub-synchronous oscillations. The present invention further discloses a system for suppressing sub-synchronous oscillations and a method for controlling operation of a power system.