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公开(公告)号：US09166500B2
公开(公告)日：2015-10-20
申请号：US14222898
申请日：2014-03-24
Applicant: General Electric Company
Inventor： Xinhui Wu , Jiao Liu , Dan Hou , Xueqin Wu , Zhuohui Tan
Abstract: A power conversion system is disclosed including a DC bus for receiving DC power, a power converter for converting the DC power to AC power, and a controller. The controller includes an active power regulator for generating a phase angle command signal, a reactive power regulator for generating a voltage magnitude command, and an active power (P) and reactive power (Q) decoupling unit for decoupling interaction between the active and reactive power regulators. The PQ decoupling unit includes an active power compensation element and a reactive power compensation element. The active power compensation element is used for generating a phase angle compensation signal based on a reactive power error signal, to compensate the phase angle command signal. The reactive power compensation element is used for generating a voltage magnitude compensation signal based on an active power error signal, to compensate the voltage magnitude command signal.
Abstract translation: 公开了一种电力转换系统，包括用于接收DC电力的DC总线，用于将DC电力转换为AC电力的功率转换器以及控制器。 该控制器包括用于产生相位角命令信号的有功功率调节器，用于产生电压幅度指令的无功功率调节器以及用于去耦有功和无功功率之间的相互作用的有功功率（P）和无功功率（Q）去耦单元 监管者。 PQ解耦单元包括有功功率补偿元件和无功功率补偿元件。 有源功率补偿元件用于基于无功功率误差信号产生相位角补偿信号，以补偿相位角指令信号。 无功功率补偿元件用于基于有功功率误差信号产生电压幅度补偿信号，以补偿电压幅度指令信号。
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公开(公告)号：US11268494B2
公开(公告)日：2022-03-08
申请号：US16334622
申请日：2016-09-19
Applicant: General Electric Company
Inventor： Zhuohui Tan , Bo Qu , Xiongzhe Huang , Xu Fu , Shuang Gu , Fernando Javier D'Amato
Abstract: A wind turbine is provided. The wind turbine includes a mechanical system, an electrical system and a controller. The controller is for determining an electrical capability limit of the electrical system according at least in part to one or more operating conditions of the wind turbine and one or more environment conditions of a site of the wind turbine, comparing the electrical capability limit of the electrical system and a mechanical capability limit of the mechanical system, and controlling the electrical system to operate at the smaller one of the electrical capability limit and the mechanical capability limit. A method for controlling a wind turbine comprising a mechanical system and an electrical system is also provided.
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公开(公告)号：US10731631B2
公开(公告)日：2020-08-04
申请号：US16256189
申请日：2019-01-24
Applicant: General Electric Company
Inventor： Zhuohui Tan , Yang Liu , Wenguang Pan
Abstract: The present disclosure provides a wind power generation system, which comprises a wind turbine for generating mechanical energy; a generator for converting the mechanical energy into electrical energy; a converter for converting the electrical energy to expected power for supplying to a grid, wherein a rotor of the generator is connected to converter, an output of a stator of the generator and an output of a converter are both connected to the grid; a controller for controlling the converter to absorb rotor-side reactive power Qrotor and to increase line-side reactive power Qline, so as to meet a reactive power demand of the grid, when a rotor speed is less than a predetermined value.
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公开(公告)号：US11601079B2
公开(公告)日：2023-03-07
申请号：US16523432
申请日：2019-07-26
Applicant: General Electric Company
Inventor： Yashomani Y Kolhatkar , Jayanti Ganesh , Zhuohui Tan , Arvind Kumar Tiwari
Abstract: The present application relates to a method for controlling a power system connected to a power grid, including: receiving a reactive power instruction and a measured reactive power from a generator; generating a reactive power error signal based on the difference between the reactive power instruction and the measured reactive power; receiving the reactive power error signal; generating a voltage instruction based on reactive power error signal; generating a voltage droop signal based on a reference reactance and a voltage at a point of common coupling; generating a voltage error signal according to at least one of the voltage instruction or the measured terminal voltage of the generator and the voltage droop signal; and producing a reactive current instruction for the converter power path based on the voltage error signal. The present application also discloses a control system for a power system connected to a power grid and a wind farm.
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公开(公告)号：US10951030B2
公开(公告)日：2021-03-16
申请号：US16611007
申请日：2018-05-02
Applicant: General Electric Company
Inventor： Govardhan Ganireddy , Rajni Burra , Wei Ren , Anthony Michael Klodowski , Saurabh Shukla , Zhuohui Tan , Robert Gregory Wagoner
Abstract: A method for reactive power control of a wind farm having a plurality of clusters of wind turbines with a cluster transformer connecting each cluster of wind turbines to a power grid is provided. The method includes receiving, via a plurality of cluster-level controllers, a reactive power command from a farm-level controller. The method also includes generating, via the cluster-level controllers, a cluster-level reactive current command for each cluster of wind turbines based on the reactive power command. Further, the method includes distributing, via the cluster-level controllers, a turbine-level reactive current command to turbine-level controllers of the wind turbines based on the cluster-level reactive current command.
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Patent Agency Ranking
公开(公告)号：US20200083710A1
公开(公告)日：2020-03-12
申请号：US16611007
申请日：2018-05-02
Applicant: General Electric Company
Inventor： Govardhan Ganireddy , Rajni Burra , Wei Ren , Anthony Michael Klodowski , Saurabh Shukla , Zhuohui Tan , Robert Gregory Wagoner
Abstract: A method for reactive power control of a wind farm having a plurality of clusters of wind turbines with a cluster transformer connecting each cluster of wind turbines to a power grid is provided. The method includes receiving, via a plurality of cluster-level controllers, a reactive power command from a farm-level controller. The method also includes generating, via the cluster-level controllers, a cluster-level reactive current command for each cluster of wind turbines based on the reactive power command. Further, the method includes distributing, via the cluster-level controllers, a turbine-level reactive current command to turbine-level controllers of the wind turbines based on the cluster-level reactive current command.
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公开(公告)号：US10819262B2
公开(公告)日：2020-10-27
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
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.
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公开(公告)号：US10352298B2
公开(公告)日：2019-07-16
申请号：US15386431
申请日：2016-12-21
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Zhuohui Tan , Robert Gregory Wagoner , Anthony Michael Klodowski
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.
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公开(公告)号：US11637515B2
公开(公告)日：2023-04-25
申请号：US16523432
申请日：2019-07-26
Applicant: General Electric Company
Inventor： Yashomani Y Kolhatkar , Jayanti Ganesh , Zhuohui Tan , Arvind Kumar Tiwari
Abstract: The present application relates to a method for controlling a power system connected to a power grid, including: receiving a reactive power instruction and a measured reactive power from a generator; generating a reactive power error signal based on the difference between the reactive power instruction and the measured reactive power; receiving the reactive power error signal; generating a voltage instruction based on reactive power error signal; generating a voltage droop signal based on a reference reactance and a voltage at a point of common coupling; generating a voltage error signal according to at least one of the voltage instruction or the measured terminal voltage of the generator and the voltage droop signal; and producing a reactive current instruction for the converter power path based on the voltage error signal. The present application also discloses a control system for a power system connected to a power grid and a wind farm.
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10.发明申请公开(公告)号：US20200052493A1
公开(公告)日：2020-02-13
申请号：US16523432
申请日：2019-07-26
Applicant: General Electric Company
Inventor： Yashomani Y. Kolhatkar , Jayanti Ganesh , Zhuohui Tan , Arvind Kumar Tiwari
Abstract: The present application relates to a method for controlling a power system connected to a power grid, including: receiving a reactive power instruction and a measured reactive power from a generator; generating a reactive power error signal based on the difference between the reactive power instruction and the measured reactive power; receiving the reactive power error signal; generating a voltage instruction based on reactive power error signal; generating a voltage droop signal based on a reference reactance and a voltage at a point of common coupling; generating a voltage error signal according to at least one of the voltage instruction or the measured terminal voltage of the generator and the voltage droop signal; and producing a reactive current instruction for the converter power path based on the voltage error signal. The present application also discloses a control system for a power system connected to a power grid and a wind farm.
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