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公开(公告)号：US20210285418A1
公开(公告)日：2021-09-16
申请号：US16334622
申请日：2016-09-19
发明人： Zhuohui TAN , Bo QU , Xiongzhe HUANG , Xu FU , Shuang GU , Fernando Javier D'AMATO
摘要： 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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2.发明申请公开(公告)号：US20190072073A1
公开(公告)日：2019-03-07
申请号：US16119119
申请日：2018-08-31
发明人： Robert Gregory WAGONER , Zhuohui TAN , Weihao ZHOU , Nithya ANAND
摘要： 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.
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公开(公告)号：US20140307494A1
公开(公告)日：2014-10-16
申请号：US14222898
申请日：2014-03-24
发明人： Xinhui WU , Jiao LIU , Dan HOU , Xueqin WU , Zhuohui TAN
IPC分类号： H02M7/537
摘要： 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.
摘要翻译： 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：US20190089279A1
公开(公告)日：2019-03-21
申请号：US16126110
申请日：2018-09-10
发明人： Yunjie GU , Yuxiang WANG , Jiao LIU , Zhuohui TAN , David SMITH , Wei REN , Wuhua LI
摘要： 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：US20180171976A1
公开(公告)日：2018-06-21
申请号：US15386431
申请日：2016-12-21
CPC分类号： F03D7/0272 , F03D7/0276 , F05B2270/327 , H02K7/183 , H02P9/007 , Y02E10/723 , Y02E10/725
摘要： 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：US20170353123A1
公开(公告)日：2017-12-07
申请号：US15535108
申请日：2015-12-11
发明人： Pengju KANG , Xueqin WU , Yingqi ZHANG , Zhuohui TAN , Ming SU
CPC分类号： H02M7/217 , H02J3/14 , H02J3/28 , H02J3/32 , H02J7/0052 , H02J7/0063 , H02J7/345 , H02M1/08 , H02M7/487 , H02M7/53871 , H02M7/539 , H02M2001/0048 , H02M2007/4835 , Y02B70/3225 , Y04S20/222
摘要： It is a system for supplying power to at least one load. The system comprises at least one power source, load bank and control device coupled to the at least one load. The load bank is coupled to at least one power source and at least one load. The load bank comprises a controllable voltage source, at least three resistors coupled between an output side of the controllable voltage source and the at least one power source, and at least one storage element. The controllable voltage source comprises more than one switches. And the at least one storage element comprises one or more capacitors, batteries, or combinations thereof. The control device is configured for controlling the switches during a first condition such that, to the extent that an output power of the at least one power source exceeds a requisite power of the at least one load, any excess output power is either supplied to the at least one storage element or consumed by the at least three resistors. This invention also provides a method for supplying power to at least one load.
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7.发明申请公开(公告)号：US20160197559A1
公开(公告)日：2016-07-07
申请号：US14955094
申请日：2015-12-01
IPC分类号： H02M5/458
CPC分类号： H02P9/007 , H02J3/386 , H02M5/4585 , H02P23/26 , Y02E10/763
摘要： A system includes a source side converter for being electrically coupled to a generator of a power source, a line side converter for being electrically coupled to a power network, a DC link coupled between the source side converter and the line side converter, and a controller for generating source side switching signals based on a current or torque of the generator and a virtual impedance signal for system damping or reactive power compensation when at least one detected signal of the system is not normal. A method for controlling the system is also included.
摘要翻译： 一种系统包括用于电耦合到电源的发生器的源极侧转换器，用于电耦合到电力网络的线路侧转换器，耦合在源极侧转换器和线路侧转换器之间的DC链路，以及控制器 用于当所述系统的至少一个检测信号不正常时，基于所述发电机的电流或扭矩产生源侧开关信号和用于系统阻尼或无功功率补偿的虚拟阻抗信号。 还包括用于控制系统的方法。
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