A coordinated control strategy for battery/supercapacitor hybrid energy storage system to eliminate unbalanced voltage in a standalone AC microgrid

Ren, Yaxing ORCID: 0000-0002-8716-6024, Rind, Saqib Jamshed and Jiang, Lin ORCID: 0000-0001-6531-2791 (2020) A coordinated control strategy for battery/supercapacitor hybrid energy storage system to eliminate unbalanced voltage in a standalone AC microgrid. Journal of Intelligent Manufacturing and Special Equipment, 1 (1). pp. 3-23.

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Abstract

<jats:sec><jats:title content-type="abstract-subheading">Purpose</jats:title><jats:p>A standalone microgrid (MG) is able to use local renewable resources and reduce the loss in long distance transmission. But the single-phase device in a standalone MG can cause the voltage unbalance condition and additional power loss that reduces the cycle life of battery. This paper proposes an energy management strategy for the battery/supercapacitor (SC) hybrid energy storage system (HESS) to improve the transient performance of bus voltage under unbalanced load condition in a standalone AC microgrid (MG).</jats:p></jats:sec><jats:sec><jats:title content-type="abstract-subheading">Design/methodology/approach</jats:title><jats:p>The SC has high power density and much more cycling times than battery and thus to be controlled to absorb the transient and unbalanced active power as well as the reactive power under unbalanced condition. Under the proposed energy management design, the battery only needs to generate balanced power to balance the steady state power demand. The energy management strategy for battery/SC HESS in a standalone AC MG is validated in simulation study using PSCAD/EMTDC.</jats:p></jats:sec><jats:sec><jats:title content-type="abstract-subheading">Findings</jats:title><jats:p>The results show that the energy management strategy of HESS maintains the bus voltage and eliminates the unbalance condition under single-phase load. In addition, with the SC to absorb the reactive power and unbalanced active power, the unnecessary power loss in battery is reduced with shown less accumulate depth of discharge and higher average efficiency.</jats:p></jats:sec><jats:sec><jats:title content-type="abstract-subheading">Originality/value</jats:title><jats:p>With this technology, the service life of the HESS can be extended and the total cost can be reduced.</jats:p></jats:sec>

Item Type:	Article
Uncontrolled Keywords:	7 Affordable and Clean Energy, 13 Climate Action
Divisions:	Faculty of Science and Engineering > School of Electrical Engineering, Electronics and Computer Science
Depositing User:	Symplectic Admin
Date Deposited:	24 Apr 2024 11:26
Last Modified:	24 Apr 2024 11:26
DOI:	10.1108/jimse-08-2020-0007
Related URLs:	Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3180565