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.

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.