A Novel Virtual Resistor and Capacitor Droop Control for HESS in Medium-Voltage DC System

Control strategy to improve load/power sharing, DC bus voltage restoration, and batteries SOC balancing in a DC microgrid

“…The ESUs SOC balancing is performed by moving droop curves based on the batteries SOC in [23]. Chen et al [24] have paid attention to proper load current-sharing and batteries SOC balancing, but do not consider system stability and DC bus voltage regulation. In [25][26][27][28], power-sharing and ESUs SOC balancing are realised by the use of the virtual impedance method, however, neither DC bus voltage restoration nor line resistance changes are considered.…”

SOC Optimization Based Energy Management Strategy for Hybrid Energy Storage System in Vessel Integrated Power System

“…However, a single type of ESD is difficult to meet the various requirements of the IPS due to its own characteristic limitations. For battery with high energy density, it has relatively low power density and slow dynamic response [9], which makes it oversized to handle the pulse power of the high power weapons. For supercapacitors with high power density and fast dynamic response, the relative low energy density makes it oversized to meet the energy demand of the IPS under some extreme cases.…”

“…For supercapacitors with high power density and fast dynamic response, the relative low energy density makes it oversized to meet the energy demand of the IPS under some extreme cases. Therefore, the hybrid energy storage system (HESS) consisting of both high energy density (battery) and high power density (supercapacitor) storages provides a promising solution for IPS with pulse load [9], [10].…”

“…The EMS of the HESS in IPS mainly focus on mitigating pulse load as well as improving voltage stability. These strategies can be classified into the decentralized control method [9]- [14] and the centralized control method [15]- [21]. In [9], a novel virtual resistor and capacitor droop control is proposed to handle the power allocation problem within HESS in IPS.…”

“…These strategies can be classified into the decentralized control method [9]- [14] and the centralized control method [15]- [21]. In [9], a novel virtual resistor and capacitor droop control is proposed to handle the power allocation problem within HESS in IPS. In [10] and [11], the intelligent decentralized control algorithm for the HESS in IPS is studied in detail.…”