The Hierarchical Control Algorithm for DC Microgrid Based on the Improved Droop Control of Fuzzy Logic

Zhang, Liang; Chen, Kang; Chi, Shengbin; Lyu, Ling; Cai, Guowei

doi:10.3390/en12152995

Cited by 15 publications

(8 citation statements)

References 20 publications

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“…The absence of a microgrid's centralized supervisor improves the strategy's dependability. Last but not least, the simulation outcomes support the suggested method [10]. Differences in line resistance between the different converters and the DC-bus in a direct current (DC) microgrid made up of numerous distributed generations degrade the current sharing accuracy of the system.…”

Section: Related Workmentioning

confidence: 59%

“…When it comes to voltage regulation and load current sharing, traditional droop control inevitably creates a conflict. This study [10] suggested a hierarchical control algorithm based on the enhanced droop control of the fuzzy logic to resolve this issue. Improving the droop curve solved problems with voltage regulation and current distribution.…”

Section: Related Workmentioning

confidence: 99%

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A Novel Hybrid Approach for Power Quality Improvement in a Vehicle-to-Grid Setup Using Droop-ANN Model

Aurangzeb

Xin

Iqbal

et al. 2023

International Journal of Energy Research

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The integration of electric vehicles (EVs) in the power grid has attracted considerable attention due to its potential benefits, such as demand response and power quality improvement. However, the intermittent and unpredictable nature of EVs’ charging and discharging behavior can cause significant challenges to the grid’s stability and power quality. This research study explores the use of a droop-ANN model to improve power quality in vehicle-to-grid (V2G) systems. The proposed approach integrates an artificial neural network (ANN) into the droop control technique to accurately predict the voltage and frequency of the charger. Through simulations, the model’s effectiveness in reducing power fluctuations and enhancing power quality was validated. The results indicate that the droop-ANN model significantly improves power quality across various battery state of charge (SoC) and charging/discharging scenarios. The findings highlight the potential of the droop-ANN model to enhance stability and reliability in V2G systems. Further research is needed to validate the model in real-world applications and explore its full potential. Overall, the droop-ANN model offers a promising solution for improving power quality in V2G systems.

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Section: Related Workmentioning

confidence: 59%

Section: Related Workmentioning

confidence: 99%

A Novel Hybrid Approach for Power Quality Improvement in a Vehicle-to-Grid Setup Using Droop-ANN Model

Aurangzeb

Xin

Iqbal

et al. 2023

International Journal of Energy Research

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“…The level of impact may however be reduced by using lower size of droop coefficients. 55 Figure 9 demonstrates the synchronization of the three VISMAs on the grid at a unified system frequency. The transient and steady-state behaviors of the VISMAs are also illustrated, respectively, in Figures 10 and 11 for active and reactive power injections at the virtual buses.…”

Section: Model Extension With Externally Added Droopmentioning

confidence: 99%

“…The plot shows that voltage at the system buses is negatively impacted when external droop control is added. The level of impact may however be reduced by using lower size of droop coefficients 55 …”

Section: Validation Of the Proposed Algorithmmentioning

confidence: 99%

Steady‐state operating points of islanded virtual synchronous machine microgrid

Kamilu,

Beck

2024

Energy Science & Engineering

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Before starting stability analysis of the multivirtual synchronous machine (n‐VISMA) power system, it is necessary to obtain the steady‐state operating points (SSOPs) of all dynamic nodes in the network. Modified traditional iterative schemes using the concept of droop bus technique in an islanded microgrid are not feasible for load flow analysis of VISMA microgrid incorporating non‐control dynamics. This paper proposes closed‐form steady‐state, fundamental‐frequency models for islanded VISMA microgrids using the concept of virtual swing buses. In this technique, the virtual internal buses of all VISMAs in the network are governed by the swing equation. The voltage at all buses is variable except the virtual buses in which the pole wheel voltages are prespecified. The algorithm was extended by a droop control localized to each VISMA. The suitability of the proposed algorithm to obtaining SSOPs of VISMA was tested on IEEE‐9 bus system with VISMA replacing electromechanical synchronous machines and also on a low‐voltage distribution system. To validate the applicability of the proposed algorithm and prove its accuracy, the case study systems were also modeled in the SIMULINK environment for detailed time domain analysis. The algorithm was found to be computationally effective for a load flow analysis of the VISMA microgrid. The results also reveal that the addition of external droop control improves the frequency stability of the system.

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“…However, the lack of mature protection schemes is a huge obstacle for development of DC microgrids [4,5]. One of serious issues is the contradiction between the system protection and control caused by system structures.…”

Section: Introductionmentioning

confidence: 99%

A Protection System for Improved Ring-Bus DC Microgrids

et al. 2019

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An improved system structure and a corresponding protection system are proposed in this paper, which aims at providing future DC microgrids with suitable protection ideas. At first, the ring-bus system is adjusted to balance the system control and protection and make the system more conventional for the equipment expansion. In addition, based on this structure, a protection system is established. It consists of two parts, which are local protection and pilot centralized protection. The local protection is designed for protecting the vulnerable power electronic components in converters and the pilot protection is mainly proposed for the fault isolation. The combination between two parts makes the whole system overcome the contradiction between protection speed and reliability and the method also takes the protection suitability into consideration. Finally, all the methods are verified by the simulation system based on the PSCAD /EMTDC.

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The Hierarchical Control Algorithm for DC Microgrid Based on the Improved Droop Control of Fuzzy Logic

Cited by 15 publications

References 20 publications

A Novel Hybrid Approach for Power Quality Improvement in a Vehicle-to-Grid Setup Using Droop-ANN Model

A Novel Hybrid Approach for Power Quality Improvement in a Vehicle-to-Grid Setup Using Droop-ANN Model

Steady‐state operating points of islanded virtual synchronous machine microgrid

A Protection System for Improved Ring-Bus DC Microgrids

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