公开(公告)号：US11545836B2

公开(公告)日：2023-01-03

申请号：US17535284

申请日：2021-11-24

Applicant: Delta Electronics, Inc.

Inventor： Changyong Wang ,  Yangyang She ,  Li Chen

IPC: H02J3/38 ,  G01R19/25 ,  H02J3/32 ,  H02M3/158

Abstract: A photovoltaic energy storage system includes an energy storage device, an inverter, a photovoltaic array device, a DC/DC conversion device and a controller. When an output voltage of the photovoltaic array device is greater than or equal to a predetermined threshold value, the photovoltaic energy storage system is operated in a first working mode. When the output voltage of the photovoltaic array device is lower than the predetermined threshold value, the photovoltaic energy storage system is operated in a second working mode. The DC/DC conversion device includes a bypass switch and a DC/DC converter. When the photovoltaic energy storage system is operated in the second working mode, the bypass switch is turned on and the DC/DC converter is disabled. Consequently, the electric power of the energy storage device is transmitted to the inverter through the bypass switch.

公开(公告)号：US20220294226A1

公开(公告)日：2022-09-15

申请号：US17535284

申请日：2021-11-24

Applicant: Delta Electronics, Inc.

Inventor： Changyong Wang ,  Yangyang She ,  Li Chen

IPC: H02J3/38 ,  H02M3/158 ,  H02J3/32

Abstract: A photovoltaic energy storage system includes an energy storage device, an inverter, a photovoltaic array device, a DC/DC conversion device and a controller. When an output voltage of the photovoltaic array device is greater than or equal to a predetermined threshold value, the photovoltaic energy storage system is operated in a first working mode. When the output voltage of the photovoltaic array device is lower than the predetermined threshold value, the photovoltaic energy storage system is operated in a second working mode. The DC/DC conversion device includes a bypass switch and a DC/DC converter. When the photovoltaic energy storage system is operated in the second working mode, the bypass switch is turned on and the DC/DC converter is disabled. Consequently, the electric power of the energy storage device is transmitted to the inverter through the bypass switch.

公开(公告)号：US10050573B2

公开(公告)日：2018-08-14

申请号：US15068659

申请日：2016-03-14

Applicant: DELTA ELECTRONICS, INC.

Inventor： Chang-Yong Wang ,  Fei Lu ,  Hai-Fen Xue ,  Li Chen ,  Liang Cao

IPC: H02P9/00 ,  F03D7/02 ,  F03D9/25

Abstract: A wind power generation system and a control method thereof are provided herein. The wind power generation system includes a doubly-fed generator, a generator-side converter, a grid-side converter and an auxiliary converter. The doubly fed generator includes a stator winding and a rotor winding. The stator winding is coupled to a grid. The generator-side converter is coupled to the rotor winding. The grid-side converter is coupled between the generator-side converter and the grid. The auxiliary converter includes a first side and a second side. The first side is coupled to the stator winding. The second side is coupled between the generator-side converter and the grid-side converter. The generator-side converter, the grid-side converter and the auxiliary converter use the same DC bus.

公开(公告)号：US09680306B2

公开(公告)日：2017-06-13

申请号：US14972667

申请日：2015-12-17

Applicant: DELTA ELECTRONICS,INC

Inventor： Haifen Xue ,  Li Chen ,  Fei Lu ,  Changyong Wang

IPC: F03D9/00 ,  H02P9/04 ,  H02J3/38 ,  H02P11/00

CPC classification number: H02J3/386 ,  Y02E10/725 ,  Y02E10/763

Abstract: A wind power generation control device, coupled between a wind power generator and a power grid, includes a converter unit and a switching unit. The converter unit includes a generator-side converter, a DC bus capacitor and a grid-side converter, wherein an AC-side of the generator-side converter is coupled to a rotor-side of the wind power generator, a DC-side of the generator-side converter is coupled to the DC bus capacitor, a DC-side of the grid-side converter is coupled to the DC bus capacitor, and an AC-side of the grid-side converter is coupled to the power grid. The switching unit is configured to switch the wind power generation control device between the doubly-fed power generation operating mode and the full-power operating mode according to a wind speed. A wind power generation system uses the wind power generation control device.