公开(公告)号：US12119778B2

公开(公告)日：2024-10-15

申请号：US17308929

申请日：2021-05-05

Applicant: TIANJIN UNIVERSITY

Inventor： Jiebei Zhu ,  Zhaoshun Deng ,  Feng Li

IPC: H02P9/10 ,  F03D9/25 ,  H02J3/00 ,  H02P9/00 ,  H02P21/00 ,  H02P101/15

CPC classification number: H02P9/10 ,  F03D9/25 ,  H02J3/00 ,  H02P9/00 ,  H02P21/00 ,  F05B2270/32 ,  H02P2101/15

Abstract: The present invention discloses a FPR system of DFIG, comprising a DC chopper circuit made up of a fully-controlled power switching device and a dump resistor first connected in series and then connected to the positive and negative poles of the DC-link; the fully-controlled power switching device is driven by a power switching device driver; the power switching device driver comprises a first inverting adder, a first PI controller and a PWM modem; the positive and negative input ends of the first inverting adder receive the real-time DC-link voltage signal and its threshold value respectively, and the output end of the first inverting adder is connected to the input end of the first PI controller; the output end of the first PI controller is connected to the input end of the PWM modem; the PWM modem outputs the pulse signal to the control end of the fully-controlled power switching device.

公开(公告)号：US20220069751A1

公开(公告)日：2022-03-03

申请号：US17308929

申请日：2021-05-05

Applicant: TIANJIN UNIVERSITY

Inventor： Jiebei Zhu ,  Zhaoshun Deng ,  Feng Li

IPC: H02P9/10 ,  F03D9/25

Abstract: The present invention discloses a FPR system of DFIG, comprising a DC chopper circuit made up of a fully-controlled power switching device and a dump resistor first connected in series and then connected to the positive and negative poles of the DC-link; the fully-controlled power switching device is driven by a power switching device driver; the power switching device driver comprises a first inverting adder, a first PI controller and a PWM modem; the positive and negative input ends of the first inverting adder receive the real-time DC-link voltage signal and its threshold value respectively, and the output end of the first inverting adder is connected to the input end of the first PI controller; the output end of the first PI controller is connected to the input end of the PWM modem; the PWM modem outputs the pulse signal to the control end of the fully-controlled power switching device.

公开(公告)号：US11509262B2

公开(公告)日：2022-11-22

申请号：US17183174

申请日：2021-02-23

Applicant: TIANJIN UNIVERSITY

Inventor： Jiebei Zhu ,  Zhipeng Shen ,  Feng Li ,  Suxuan Li

IPC: H02S40/32 ,  H02S40/38 ,  H02J7/34

Abstract: The present invention discloses a photovoltaic power generation virtual inertia compensation system based on SCES, comprising a photovoltaic array, a boost circuit and a grid-connected inverter, which are electrically connected in sequence, and further comprising a supercapacitor assembly for energy storage, a bidirectional DC-DC converter and a virtual inertia control module; an end of the bidirectional DC-DC converter is electrically connected to an output end of the unidirectional DC-DC boost circuit and an input end of the power grid inverter, and the other end thereof is electrically connected to the supercapacitor assembly; the bidirectional DC-DC converter comprises two power switch devices; the virtual inertia control module comprises a first inverting adder, a virtual inertia converter, a second inverting adder, a first PI controller, a third inverting adder, a second PI controller and a PWM modem, which are electrically connected in sequence.

公开(公告)号：US20220029581A1

公开(公告)日：2022-01-27

申请号：US17183174

申请日：2021-02-23

Applicant: Tianjin University

Inventor： Jiebei Zhu ,  Zhipeng Shen ,  Feng Li ,  Suxuan Li

IPC: H02S40/32 ,  H02S40/38 ,  H02J7/34

Abstract: The present invention discloses a photovoltaic power generation virtual inertia compensation system based on SCES, comprising a photovoltaic array, a boost circuit and a grid-connected inverter, which are electrically connected in sequence, and further comprising a supercapacitor assembly for energy storage, a bidirectional DC-DC converter and a virtual inertia control module; an end of the bidirectional DC-DC converter is electrically connected to an output end of the unidirectional DC-DC boost circuit and an input end of the power grid inverter, and the other end thereof is electrically connected to the supercapacitor assembly; the bidirectional DC-DC converter comprises two power switch devices; the virtual inertia control module comprises a first inverting adder, a virtual inertia converter, a second inverting adder, a first PI controller, a third inverting adder, a second PI controller and a PWM modem, which are electrically connected in sequence.