State of Charge Balance of Distributed Batteries in DC Shipboard Microgrids
ID:21
Submission ID:24 View Protection:ATTENDEE
Updated Time:2021-12-03 10:29:33 Hits:720
Oral Presentation

Start Time:2021-12-15 15:00 (Asia/Shanghai)
Duration:15min
Session:[B] Power electronic technology and application » [B1] Session 2
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Abstract
Electric ships have become popular for the purpose of reducing greenhouse gas emissions and improving energy efficiency. The DC shipboard microgrid (SMG) provides a good solution to integrate the battery energy storage system (BESS), generators, electric propulsion system, and shipboard loads. In order to avoid over-discharging and over-charging of batteries and prolong the battery lifetime, it is necessary to balance the state-of-charge (SoC) of batteries. This paper proposes a decentralized SoC balance method based on droop control in the DC SMG. The battery SoC balancing speed is regulated by an exponent parameter n, and larger n leads to faster SoC balance. In addition, the voltage drop caused by the proposed SoC-based droop control can be ensured within the allowed value in the entire SoC range. Verification of the proposed method is implemented in Matlab/Simulink model, which consists of two batteries. The simulation results verify the effectiveness of the proposed method.
Keywords
DC shipboard microgrid,battery energy storage system,state of charge,droop control
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