Title:
VOLTAGE HIERARCHICAL CONTROL SYSTEM AND ENERGY MANAGEMENT METHOD FOR MULTI-ENERGY COMPLEMENTARY HYBRID ENERGY STORAGE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/000643
Kind Code:
A1
Abstract:
Provided are a voltage hierarchical control system and energy management method for a multi-energy complementary hybrid energy storage system; both a supercapacitor unit and a lithium battery unit are connected to a DC bus (1, 11), constituting a parallel structure-type hybrid energy storage system, and the supercapacitor unit and the lithium battery unit are equipped with power devices (2, 4) and switches (6, 7) to control the connection relationships between the corresponding units and the DC bus; a detection circuit (14) detects the current and voltage values of the supercapacitor unit, lithium battery unit, and DC bus, and detects the operating parameters of an energy conversion system unit (8) and transmits them to a microprocessor (13); the energy conversion system unit is connected in parallel to the DC bus, and performs two-way energy conversion of AC and DC energy; the microprocessor, according to the collected relationship of the voltages of the supercapacitor unit and the lithium battery unit, determines system operating conditions, and uses a voltage hierarchical control policy to control the charging and discharging state of the supercapacitor unit and the lithium battery unit.
Inventors:
ZHOU GUANGXU (CN)
HOU DONGDONG (CN)
ZHU MENGMEI (CN)
SONG NINGRAN (CN)
LIU YUAN (CN)
GAO JIA (CN)
MU YONGYUN (CN)
GUO KUN (CN)
HOU DONGDONG (CN)
ZHU MENGMEI (CN)
SONG NINGRAN (CN)
LIU YUAN (CN)
GAO JIA (CN)
MU YONGYUN (CN)
GUO KUN (CN)
Application Number:
PCT/CN2020/087638
Publication Date:
January 07, 2021
Filing Date:
April 29, 2020
Export Citation:
Assignee:
INST OF AUTOMATION SHANDONG ACADEMY OF SCIENCES (CN)
International Classes:
H02J3/32; H02J7/34
Foreign References:
| CN110350559A | 2019-10-18 | |||
| CN106329572A | 2017-01-11 | |||
| CN106208113A | 2016-12-07 | |||
| CN106899029A | 2017-06-27 |
Other References:
MENG RUNQUAN , LIU JIAYING , WEN BO , HAN XIAOQING: "Hybrid Energy Storage Control and System Hierarchical Coordinated Control Strategy for DC Microgrids", HIGH VOLTAGE ENGINEERING, vol. 41, no. 7, 31 July 2015 (2015-07-31), pages 2186 - 2193, XP055771615, ISSN: 1003-6520, DOI: 10.13336/j.1003-6520.hve.2015.07.010
Attorney, Agent or Firm:
JINAN SHENGDA INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
Download PDF: