Hierarchical voltage control system of multi-energy complementary hybrid energy storage system and energy management method
US11791107B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2020 |
| Grant date | Oct 17, 2023 |
| Priority date | — |
| Expiry date | Nov 19, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/13
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A hierarchical voltage control system is provided. A supercapacitor unit and a lithium battery unit are both connected to a DC bus to form a parallel-structure-type hybrid energy storage system, and are each configured with a power device and a switch to control a connection relationship between the corresponding unit and the DC bus. A detection circuit detects current and voltage values of the supercapacitor unit, the lithium battery unit, and the DC bus, detects an operating parameter of a power conversion system, and transmits the operating parameter to a processor, the power conversion system being connected in parallel to the DC bus for bidirectional power conversion of AC and DC energy sources. A microprocessor determines a system operating condition and uses a hierarchical voltage control strategy to control charging and discharging states of the supercapacitor unit and the lithium battery unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.