A Dynamic and Cooperative Control Strategy for Multi-Hybrid Energy Storage System of DC Microgrid Based on SOC

Li, Hao; Fu, Lijun; Zhang, Yan; Xiong, Yiyong

doi:10.3389/fenrg.2021.795513

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…In reference [3], an improved E index U/I droop control for energy storage was constructed. Reference [4] balances different energy storage SOCs based on LPF method and droop method. In reference [5], an improved droop control was proposed considering SOC and load power demand.…”

Section: Introductionmentioning

confidence: 99%

Adaptive hierarchical control strategy for AC/DC microgrid considering SOC of energy storage

Chen

Zhang

Han

2023

Eighth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2022)

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In order to improve the reliability and flexibility of energy storage in microgrid, an adaptive hierarchical control strategy considering energy storage SOC was proposed. Firstly, the operation state of energy storage was controlled by the sequence of battery voltage, bus voltage and energy storage SOC. Secondly, the State Of Charge (SOC) of energy storage was graded and the improved droop coefficient with continuous different changing trends was set. Then, the Microgrid Interconnect Converter (MIC) adopted the outer loop normalized power sharing control and the feed-forward inner loop current control. Finally, the AC-DC hybrid microgrid simulation model of fan, photovoltaic, energy storage and load were established to verify the effectiveness of the proposed strategy. The results showed that the proposed strategy can ensure the stability of frequency and voltage of the system when dealing with the changes of external environment.

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Section: Introductionmentioning

confidence: 99%

Adaptive hierarchical control strategy for AC/DC microgrid considering SOC of energy storage

Chen

Zhang

Han

2023

Eighth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2022)

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“…Several important studies on this topic have been reported in the literature (Tummuru et al, 2015a;Tummuru et al, 2015b;Karimi et al, 2017;Manandhar et al, 2019;Xu et al, 2020;Hosseini et al, 2021;Jiang et al, 2021;Li et al, 2022). However, these studies have focused on isolated situations with DC link for RES-grid connected HESS or DG resources.…”

Section: Introductionmentioning

confidence: 99%

“…In MG management systems, a coordinated SoC control strategy is implemented to stabilize the bus frequency and voltage amplitude of MGs based on a model predictive control algorithm for DG and ESS units. If one communication link fails, the whole system is out of synchronization, so ESS and RES are coordinated by centralized management control (Li et al, 2022). According to the EMS proposed in (Xu et al, 2020), power can be injected or withdrawn from the grid based on changes in DC and AC load and changes in RES power.…”

Section: Introductionmentioning

confidence: 99%

Energy management of renewable energy-based microgrid system with HESS for various operation modes

Kumar

Palanisamy²

2022

Front. Energy Res.

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This paper proposes a ramp-rate control approach for a grid-connected MG with a hybrid energy storage system. Distributed energy sources (DERs), such as solar photovoltaic (PV) and wind, combined with energy storage (ES) and controllable loads, are critical to a power grid that can handle the intermittent nature of renewable energy sources. Therefore, the complexity of the system is increasing as researchers move towards a more renewable based power grid. An energy management system (EMS) for microgrids must consider the power available in RESs as well as the storage capacity of energy storage devices (ESSs). Modern MGs include a wide range of converters for a variety of applications, including distributed generation interconnection, grid integration, energy storage management systems, and demand management, among others. So, the ramp-rate control smooths fluctuations in photovoltaic power, which increases system reliability. In the proposed system, 80 V DC is used to supply high and low power DC loads. The suggested system can extract the maximum amount of energy from RESs, maintain efficient ESS management, and achieves quick DC-link voltage regulation with settling time of 230 ms throughout all operating modes. These conditions are met by the energy management system, which gives the MG with operational capability and ensures its reliability. The MG with proposed features and EMS was validated using the MATLAB/Simulink environment, and results were obtained using the Hardware-in-the-Loop (HIL) experimental test bench. The proposed small-scale RES-based MG can be used to develop and test algorithms for a wide range of MG applications.

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Technical Performance Optimization of a Novel Geothermal Hybrid Power Generation System

Zhou

Qin

et al. 2022

Front. Energy Res.

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Geothermal Aided Power Generation (GAPG) technology is a geothermal hybrid power system that geothermal energy has been integrated into the fossil fired plant to preheat the feedwater, and displace the extraction steam of fossil fired plant. In such a power system, the heat exchange process between extraction steam and geo-fluid occurs in a heat exchange between. When the geo-fluid in the heat exchanger quench to lower temperature for heat transfer purpose, silica scaling would occur in the heat exchanger system. The performance of the GAPG plant would be influenced by the configuration of the heat exchanger and silica scaling in the heat exchanger. For a GAPG plant, it has two possible configurations for a heat exchanger system: series arrangement and parallel arrangement. The different configuration also impacts on the technical performance of the GAPG plant. The silica scaling in the heat exchanger system would harm the performance of the GAPG plant. In this study, a GAPG power system from a 300 MW power plant is used as a case study to understand the impact of displacement selections and heat exchanger arrangement on the performance of the GAPG plant. It was found that there is no silica scaling occurring in heat exchangers system if geo-fluid is used to displace to high-grade extraction steam only. Furthermore, the Parallel arrangement is better than the Series arrangement in terms of the additional power output. Moreover, the GAPG plant has protentional to reduce carbon dioxide emissions by 13%.

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A Dynamic and Cooperative Control Strategy for Multi-Hybrid Energy Storage System of DC Microgrid Based on SOC

Cited by 4 publications

References 21 publications

Adaptive hierarchical control strategy for AC/DC microgrid considering SOC of energy storage

Adaptive hierarchical control strategy for AC/DC microgrid considering SOC of energy storage

Energy management of renewable energy-based microgrid system with HESS for various operation modes

Technical Performance Optimization of a Novel Geothermal Hybrid Power Generation System

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