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Content Provider | IET Digital Library |
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Author | Zhang, Yuhan Du, Guiping Lei, Yanxiong |
Abstract | In this study, a novel energy management strategy (EMS) with two degrees of freedom is proposed for hybrid energy storage systems consisting of supercapacitor (SC) and battery in islanded microgrids. The proposal introduces two degrees of freedom including an adaptive high-pass filter cut-off frequency f c and a charge/discharge coefficient k b, according to the SC and battery state of charge (SOC), respectively. The f c regulates SC current in the transient process and the k b controls battery current in the steady-state. Therefore, appropriate power distribution that the SC suppresses the transient power fluctuations while the battery supports average power demand is realised, over-charging, and over-discharging are avoided and the current stress of the battery during the shut-down process is reduced. Moreover, three operation modes for isolated DC microgrids, comprising power-sharing mode, battery-only mode, and extreme mode are demonstrated. Hence, the DC microgrid can remain stable for the whole time, achieve seamless transitions from the power-sharing mode to the two others, and provide faster SOC recovery of the SC. The effectiveness of the proposed EMS is validated by experimental studies with a prototype of the simplified DC microgrid. |
Starting Page | 3171 |
Ending Page | 3179 |
Page Count | 9 |
ISSN | 17554535 |
Volume Number | 13 |
e-ISSN | 17554543 |
Issue Number | Issue 14, Nov (2020) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-pel/13/14 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2020.0404 |
Journal | IET Power Electronics |
Publisher Date | 2020-06-24 |
Access Restriction | Open |
Rights Holder | © The Institution of Engineering and Technology |
Subject Keyword | Appropriate Power Distribution Average Power Demand Battery-only Mode Control of Electric Power System Current Control Current Stress Degree of Freedom Distributed Power Generation Electric Current Control EMS Energy Management Strategy Energy Management System Energy Storage High-pass Filter Cut-off Frequency Hybrid Energy Storage System Islanded DC Microgrid Islanded Microgrid Isolated DC Microgrid Other Power Apparatus And Electric Machine Power Generation Control Power System Economics Power System Managemen Power System Operation Power-sharing Mode Secondary Cell Simplified DC Microgrid Supercapacitor Transient Power Fluctuations Transient Process |
Content Type | Text |
Resource Type | Article |
Subject | Electrical and Electronic Engineering |
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