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

IPC: H02M7/537 ,  H02M7/48 ,  H02J3/38 ,  H02J3/48 ,  H02J3/50

CPC classification number: H02M7/537 ,  H02J3/383 ,  H02J3/48 ,  H02J3/50 ,  H02M7/48 ,  Y02E10/563

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。

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

IPC: H02P9/10 ,  H02J3/24 ,  H02P9/00 ,  F03D9/25 ,  H02P9/02 ,  H02P101/15 ,  H02J3/38

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.

公开(公告)号：US20190207598A1

公开(公告)日：2019-07-04

申请号：US16223514

申请日：2018-12-18

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Hao Yu ,  Fan Zhang ,  Zhihui Yuan ,  Jiao Liu ,  Stefan Schroeder ,  Yingqi Zhang

IPC: H03K17/0812

CPC classification number: H03K17/0822 ,  H03K17/0828

Abstract: A protection circuit for a controllable switch comprising a control terminal, a first terminal, and a second terminal having a lower electric potential than the first terminal, the protection device comprising: an active clamping module, coupled between the first terminal and the control terminal of the controllable switch, configured to clamp a first voltage across the first terminal and the second terminal; and a damping module, coupled to an output of the active clamping module and configured to damp oscillations of a second voltage across the control terminal and the second terminal. Embodiments of the present disclosure also relate to a protection method for a controllable switch.