Coordinated Control Strategy for Hybrid off-Grid System Based on Variable Speed Diesel Generator

Rezkallah, Miloud; Dubuisson, F.; Singh, Sanjeev; Singh, Bhim; Chandra, Ambrish; Ibrahim, Hussein; Ghandour, Mazen

doi:10.1109/tia.2022.3174825

Cited by 6 publications

(3 citation statements)

References 26 publications

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“…At present, the research and application of domestic and foreign scholars for converter on/off-grid flexible switching, power transfer control, and other technologies are mainly focused on the fields of uninterruptible power supply, distributed grid, micro-grid, and new energy generation. Reference [21] and Reference [22] adopt adaptive droop control and virtual synchronous generator methods, respectively, but due to the variability of power supply capacity and frequency of the grid, its regulation ability is limited, and the power transfer and precise control effect are not good. The unified control mode using voltage outer loop and current inner loop does not require control mode switching, thus it is easy to realize smooth switching between on/off-grid, but the dynamic response of the power supply converter, which is controlled as a current source characteristic in the off-grid mode, is slow, and the disadvantage is especially obvious in the occasion of load high-power casting and switching.…”

Section: Introductionmentioning

confidence: 99%

A Novel Voltage-Current Dual-Drop Control Method for Shipboard DC Micro-Grid With Energy Storage Systems

Chen,

Tian,

et al. 2024

IEEE Access

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The DC micro-grid system, as a new generation of shipboard DC micro-grid system, has the advantages of integrating renewable energy and enhancing the stability and reliability of the power system. For the energy distribution problem of energy storage battery charging and discharging in shipboard DC micro-grid, P-V voltage droop control and SOC-I current droop control methods are proposed. The SOC-I control method incorporated in the battery charging and discharging process can effectively balance the SOC and output power of the energy storage battery. For the on/off-grid process of shipboard power converter and onshore power, the control method of voltage and current control mode switching is proposed, which realizes the fast response of output voltage in off-grid mode and the controllable transfer of power interacting with the grid in grid-connected mode. Secondly, a pre-synchronized control based on amplitude and frequency modulation achieves a flexible on-grid/off-grid connection of the power converter. A method based on the parallel connection of multiple reduced-order generalized integrator (ROGI) is introduced to achieve suppression of output voltage unbalance as well as 5th and 7th harmonics. Finally, the efficiency and correctness of the proposed control method has been successfully evaluated an level 750KVA shipboard micro-grid system.INDEX TERMS Energy storage converter, harmonic suppression, on/off-grid control, shipboard DC microgrid system, voltage-current dual-droop control

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Section: Introductionmentioning

confidence: 99%

A Novel Voltage-Current Dual-Drop Control Method for Shipboard DC Micro-Grid With Energy Storage Systems

Chen,

Tian,

et al. 2024

IEEE Access

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“…Lidozzi et al [5] used adaptive direct-tuning control to improve the response of the DC-link voltage during largescale changes in grid load and diesel speed. Miloud et al [6] studied the control mode and method of the DC-link voltage in a doubly fed motor with battery energy storage system, which improved the response speed. Zhou et al [7] demonstrated good performance in the power distribution control of hybrid electric propulsion ships composed of variable speed diesel generators and lithium batteries under different distribution modes.…”

Section: Introductionmentioning

confidence: 99%

“…Iwanski et al [12] used an empirical formula among the fuel consumption rates, torque, and speed, and applied an incremental tracking algorithm to obtain the optimal fuel consumption rate, which still utilized the differentiability of the empirical formula to gradually calculate the optimal speed. Miloud et al [6] also used the same method to calculate the optimal speed.…”

Section: Introductionmentioning

confidence: 99%

Research on Speed Optimization and Adjusting Strategy of Variable Speed Diesel Generator Base on Sliding Interval

Wang,

Yun

2023

JMSE

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A marine variable speed generator can dynamically adjust the set speed of a diesel engine according to the actual power load level by the grading method, so the goal of energy conservation is achieved. However, the grading method relies on engineering experience. The actual range of power load fluctuation is uncertain, which leads to a decrease in fuel efficiency. Therefore, a method based on load sliding interval is put forward. In this method, a fixed width load interval is set at first, and then the interval slides on the diesel engine load at a step of 1%. The minimum fuel consumption rate speed for the interval is optimized during the sliding process. Finally, a minimum fuel consumption rate speed curve corresponding to the sliding interval position is obtained. The optimization objective is to have the minimum weighted average fuel consumption rate at the integer load points within each interval. The actual power load is monitored and used to determine the current load interval during the calculation of the set speed. The minimum fuel consumption rate speed curve optimized was applied to query the setting value of the diesel speed. The mean value engine model was applied for simulation under three load conditions. The results show that the sliding interval method could achieve the best fuel saving effect under any power load; the set value of the diesel engine speed changed smoothly under the fluctuating power load conditions, and the fuel saving ability was better according to the actual power load conditions on the ship.

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Control of Hybrid Off-Microgrid Configurations Based on Renewable and Non-renewable Energy Sources

Rezkallah

Ibrahim

Chandra

et al. 2023

Studies in Infrastructure and Control

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Coordinated Control Strategy for Hybrid off-Grid System Based on Variable Speed Diesel Generator

Cited by 6 publications

References 26 publications

A Novel Voltage-Current Dual-Drop Control Method for Shipboard DC Micro-Grid With Energy Storage Systems

A Novel Voltage-Current Dual-Drop Control Method for Shipboard DC Micro-Grid With Energy Storage Systems

Research on Speed Optimization and Adjusting Strategy of Variable Speed Diesel Generator Base on Sliding Interval

Control of Hybrid Off-Microgrid Configurations Based on Renewable and Non-renewable Energy Sources

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