FLEXIBLE DC-TO-DC CONVERTER CAPABLE OF MULTI-PORT DC POWER FLOW CONTROL AND CONTROL METHOD THEREOF

WIPO Patent Application WO/2024/016749

A1

Disclosed are a flexible DC-to-DC converter capable of multi-port DC power flow control and a control method thereof. The flexible DC-to-DC converter comprises a modular multi-level flexible DC-to-DC converter and a DC power flow controller built in the flexible DC-to-DC converter. The flexible DC-to-DC converter has the characteristics of modularization and flexible adjustment of the number of ports, and can implement bidirectional control of DC power flows in two or more lines, thereby solving the problem of insufficient freedom of DC power flow control in a meshed DC system. The DC power flow controller is directly built in the flexible DC-to-DC converter. In this way, energy balance can be achieved without an external power supply source and a high-voltage isolation device, and the power flow adjustment range is wide. By means of the control method proposed in the present invention, the balance of internal and external energy of the device can be controlled. The main loop parameter design method proposed in the present invention can provide a model selection basis for circuit elements for designing the device. The fault protection strategy and fault current active suppression method proposed in the present invention can improve reliability of the device under a complex and extreme working condition and assist a system in fault ride through.

JP2016195509	LOOP CONTROLLER AND DISTRIBUTION CIRCUIT CONTROL SYSTEM
JPS59161348	[Title of the device] A control device of a ship electric-power generator

ZHANG JIANWEN (CN)
ZHOU JIANQIAO (CN)
SHI GANG (CN)
CAI XU (CN)
LIU YUWEN (CN)
SU LIQIAN (CN)
LIANG KEJING (CN)

PCT/CN2023/087952

January 25, 2024

April 13, 2023

Click for automatic bibliography generation  

UNIV SHANGHAI JIAOTONG (CN)

H02J3/06; H02J3/24; H02J3/36; H02M1/088; H02M7/219

CN115333106A	2022-11-11
CN112701716A	2021-04-23
CN114629158A	2022-06-14
CN111725831A	2020-09-29
CN112510715A	2021-03-16

LIU, ZICHEN; ZHANG, JIANWEN; SHI, GANG; ZHOU, JIANQIAO; ZHANG, YIXIN: "An Embedded DC Power Flow Controller Based on Modular Multilevel Converter and Its Control Strategy", PROCEEDINGS OF THE CSEE, vol. 42, no. 19, 28 October 2021 (2021-10-28), CN , pages 7170 - 7182, XP009552719, ISSN: 0258-8013, DOI: 10.13334/j.0258-8013.pcsee.211458
SUN YONG; XIAO YONGSHAN; FAN XINMING; ZHANG JIANWEN; ZHOU JIANQIAO; SHI GANG; CAI XU: "A Novel Multiport Modular Multilevel Converter for AC-DC Hybrid Distribution Power System", 2022 INTERNATIONAL POWER ELECTRONICS CONFERENCE (IPEC-HIMEJI 2022- ECCE ASIA), IEEJ-IAS, 15 May 2022 (2022-05-15), pages 2187 - 2193, XP034141896, DOI: 10.23919/IPEC-Himeji2022-ECCE53331.2022.9807054
LIU YUWEN; FAN XINMING; ZHOU JIANQIAO; SHI GANG; WANG JIACHENG; ZANG JIAJIE; CAI XU; ZHANG JIANWEN: "An Isolated Modular Multi-level DC Transformer with Embedded Multi-port Current Flow Controller for Meshed DC Distribution Grids", 2022 INTERNATIONAL POWER ELECTRONICS CONFERENCE (IPEC-HIMEJI 2022- ECCE ASIA), IEEJ-IAS, 15 May 2022 (2022-05-15), pages 2182 - 2186, XP034141816, DOI: 10.23919/IPEC-Himeji2022-ECCE53331.2022.9807097

YUV (NANJING) INTELLECTUAL PROPERTY FIRM (SPECIAL GP) (CN)

View/Download PDF      PDF Help

Previous Patent: PUMP BODY ASSEMBLY, COMPRESSOR AND DOUBLE-TEMPERATURE AIR CONDITIONING SYSTEM

Next Patent: LASER HAIR REMOVAL HANDLE