公开(公告)号：US20190072073A1

公开(公告)日：2019-03-07

申请号：US16119119

申请日：2018-08-31

Applicant: General Electric Company

Inventor： Robert Gregory WAGONER ,  Zhuohui TAN ,  Weihao ZHOU ,  Nithya ANAND

IPC: F03D7/02 ,  F03D9/25 ,  G05B19/02

Abstract: A system and method for preventing voltage collapse of a wind turbine power system includes receiving a power input value and a voltage input value from a point of common coupling of the wind turbine power system. The method also includes determining a limit cycle reference point of the wind turbine power system as a function of the input values. The method further includes comparing the limit cycle reference point to at least one predetermined threshold. If the limit cycle reference point is greater than the at least one predetermined threshold, the method includes determining a delta value for the real and reactive voltage commands of the wind turbine power system. Further, the method includes determining updated real and reactive voltage commands based on the delta value. As such, the method also includes operating the wind turbine power system based on the updated real and reactive voltage commands.

公开(公告)号：US20180331643A1

公开(公告)日：2018-11-15

申请号：US15975888

申请日：2018-05-10

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Govardhan GANIREDDY ,  Saurabh SHUKLA ,  Robert Gregory WAGONER

IPC: H02P9/00 ,  F03D9/25

CPC classification number: H02P9/007 ,  F03D7/0272 ,  F03D7/043 ,  F03D9/25 ,  F05B2260/821 ,  F05B2270/1033 ,  F05B2270/32 ,  F05B2270/404 ,  H02P9/008 ,  H02P2101/10 ,  H02P2101/15 ,  H02P2101/25

Abstract: A method for operating a power generation system is presented. The method includes estimating, by a controller, at least one of a required load and input power of the doubly-fed induction generator for a pre-determined future time duration. The method includes comparing, by the controller, the estimated at least one of the required load and the input power with a corresponding threshold value. Moreover, the method includes transitioning, by the controller, operation of the power generation system from a partial power conversion mode to a full power conversion mode by controlling switching of one or more of a plurality of switches if the estimated at least one of the required load and the input power is less than the corresponding threshold value, wherein the plurality of switches includes a first set of switches coupled to stator winding of the doubly-fed induction generator.

公开(公告)号：US20180171976A1

公开(公告)日：2018-06-21

申请号：US15386431

申请日：2016-12-21

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Zhuohui TAN ,  Anthony Michael KLODOWSKI ,  Robert Gregory WAGONER

IPC: F03D7/02 ,  H02P9/00 ,  H02K7/18 ,  F03D9/25

CPC classification number: F03D7/0272 ,  F03D7/0276 ,  F05B2270/327 ,  H02K7/183 ,  H02P9/007 ,  Y02E10/723 ,  Y02E10/725

Abstract: A wind generation system includes a wind turbine for generating mechanical power, a doubly-fed induction generator for converting the mechanical power to electrical power, a converter for converting the electrical power to a desired electrical power for supplying to a power grid, and a transformer through which a stator of the generator is coupled to the power grid. When a measured rotation speed feedback from the rotor of the generator is lower than an original cut-in rotation speed of the rotor, a cut-in rotation speed of the rotor is lowered by determining a DC link voltage margin of the converter, determining a DC link voltage setpoint of the converter based on the determined DC link voltage margin; and controlling the converter based on the determined DC link voltage setpoint; and/or by increasing a turn ratio of the transformer to reduce a grid voltage from the power grid.