Frequency-division power sharing and hierarchical control design for DC shipboard microgrids with hybrid energy storage systems

Jin, Zheming; Meng, Lexuan; Vasquez, Juan C.; Guerrero, Josep M.

doi:10.1109/apec.2017.7931224

Cited by 21 publications

(10 citation statements)

References 24 publications

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“…Out of these methods, fuzzy logic control, DC‐bus signalling and droop control are the most commonly used ones due to various advantages that are discussed in this section. However, droop control has been reviewed in more detail due to its simplicity in adoption and superior in performance at the primary level control over other control methods [17–21, 23, 24].…”

Section: Primary Controlmentioning

confidence: 99%

Review of hierarchical control strategies for DC microgrid

Abhishek

Ranjan

Devassy

et al. 2020

IET Renewable Power Generation

128

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This work presents an extensive review of hierarchical control strategies that provide effective and robust control for a DC microgrid. DC microgrid is an efficient, scalable and reliable solution for electrification in remote areas and needs a reliable control scheme such as hierarchical control. The hierarchical control strategy is divided into three layers namely primary, secondary and tertiary based on their functionality. In this study, different methods of primary control for current and voltage regulation, secondary control for error-correction in voltage and current, power sharing in a microgrid and microgrid clusters and tertiary control for power and energy management with a primary focus on minimal power loss and operational cost in a DC microgrid system are reviewed in-depth. Along with this, the advantages and limitations of various control structures like centralised, decentralised, distributed are discussed in this study. After a comparative study of all control strategies, the optimum control schemes from the author's point of view are also presented.

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Section: Primary Controlmentioning

confidence: 99%

Review of hierarchical control strategies for DC microgrid

Abhishek

Ranjan

Devassy

et al. 2020

IET Renewable Power Generation

128

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“…In addition, for naval ships equipped with high power pulsed loads, the power system control is more complicated with HESS. Since UC and flywheel ESS could generally discharge with a higher power ramp rate than the battery, power sharing for a HESS consisting of a battery and UC or flywheel can be achieved by allocating the high-frequency load demand to the UC or flywheel ESS, while allocating the low-frequency load demand to the battery [23,24].…”

Section: Introductionmentioning

confidence: 99%

Coordinated Control of Diesel Generators and Batteries in DC Hybrid Electric Shipboard Power System

Wei

et al. 2021

Energies

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Hybrid electric ships powered by diesel generators and batteries are the main configuration for shipboard microgrids (SMGs) in the current maritime industry. Extensive studies have been conducted for the hybrid operation mode, whereas the all-electric operation mode and the switching between the aforementioned two modes in a system with multiple generators and batteries have not been tested. In this paper, a coordinated approach for a hybrid electric ship is proposed, where two operation modes have been simultaneously considered. More specifically, for achieving an efficient operation with reduced generator wear losses, the governor-less diesel-engine-driven generators have been adopted in the study. According to the practical operation conditions, two operation modes, the all-electric and hybrid modes, are preset. Based on these, the coordination of the generators acting as the main power sources and batteries regulating the power flow and improving the generator efficiency is studied. The governor-less diesel generators are regulated to inject the rated power in order to maximize the generator efficiency, while the DC bus voltage is regulated by DC/DC converters. For the benefit of the overall lifespan of battery banks, power sharing during charging and discharging states have been realized by the state of charge (SoC)-based adaptive droop regulator. For the test of two operation modes, as well as the mode switching, a simulation assessment in a 1 kV DC SMG has been conducted. The simulation results show that the DC bus voltage can be controlled well, and that the power sharing among batteries follows the design. Additionally, smooth transients can be observed during mode switching when the proposed control scheme is applied.

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“…In [12], the HESS consisting of superconducting magnetic energy storage and lithium battery is studied and the dynamic droop control is adopted to control charge/discharge of the ESDs. In [13], a frequency-division based EMS is proposed and the power allocation in the HESS is realized through the droop control and inverse-droop control. In [14], a distributed state of charge (SOC) balancing control scheme is proposed for the HESS power allocation.…”

Section: Introductionmentioning

confidence: 99%

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

Xue-ping

2020

IEEE Access

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Hybrid energy storage system (HESS) consisted of battery and supercapacitor plays an essential role in supporting the normal operation of pulse load in vessel integrated power system (IPS) as well as improving power quality. However, due to the unique properties of the pulse load and diversified operations of the vessel, such advanced power system architectures tend to face greater challenges in optimal power allocation. In order to address the power allocation challenges, a novel optimized state-of-charge (SOC) feedback based energy management strategy is proposed for HESS in IPS to restrain the DC bus voltage fluctuation in this paper. Firstly, considering the operating characteristics of the pulse load in IPS, the optimized SOC of the HESS is introduced to the low-pass filter (LPF) with variable time constant to split the power in the HESS. Secondly, SOC recovery control of the supercapacitor is introduced to the LPF to optimize the size of the HESS as well as prolong the lifetime of the battery. Also, the enforced intervention is introduced to avoid the opposite state of the HESS. The proposed strategy can make full use of the HESS complementary characteristics to compensate the pulse load and optimize the HESS. Finally, the simulation conducted in PSCAD demonstrates the effectiveness of the strategy proposed in pulse load compensation as well as HESS optimization. INDEX TERMS Integrated power system, pulse load, hybrid energy storage system, low pass filter, SOC recovery, SOC feedback.

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Frequency-division power sharing and hierarchical control design for DC shipboard microgrids with hybrid energy storage systems

Cited by 21 publications

References 24 publications

Review of hierarchical control strategies for DC microgrid

Review of hierarchical control strategies for DC microgrid

Coordinated Control of Diesel Generators and Batteries in DC Hybrid Electric Shipboard Power System

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

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