Synchronous Generator Control Concept and Modified Droop for Frequency and Voltage Stability of Microgrid Including Inverter-Based DGs

Rajamand, Sahbasadat

doi:10.1007/s42835-020-00383-z

Cited by 16 publications

(4 citation statements)

References 30 publications

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“…Microgrids working in islanded mode adopt the droop controller for voltage and frequency regulation as discussed by Rajamand [2]. Inverters connected in parallel are synchronized using the droop controller.…”

Section: Introductionmentioning

confidence: 99%

Steady state stability assessment of voltage source converter in a DC microgrid under weak grid conditions

Viswanathan,

Jayaramaiah

2024

IJPEDS

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Traditionally, steady-state assessment involves analyzing numerous variables using Eigen analysis. This paper presents a decision support application for diagnosing the steady-state assessment of droop-controlled voltage source inverters in islanded microgrid operations or weak grid operations with reduced input attributes. This paper proposes an approach using feature extraction from the state space variables of the droop-controlled voltage source inverter (VSI). Photovoltaic (PV) and wind energy sources are considered with their stipulated power-delivering capability considered. To improve the generalization of the predictive model, preprocessing techniques are employed to eliminate data distortions. Dimensionality reduction is achieved through principal component analysis (PCA) applied to the steady-state variables. The evaluation of the VSI's steady-state stability is conducted utilizing support vector classification algorithm. To ascertain the reliability of the steady-state stability classification, an assessment of the support vector machine (SVM) model's performance is carried out, which includes the examination of metrics like the area under the curve (AUC) and the receiver operating characteristics (ROC) curve. The findings from the assessment of VSI's steady-state stability indicate a commendable level of performance, achieving an accuracy rate of 93.5%.

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Section: Introductionmentioning

confidence: 99%

Steady state stability assessment of voltage source converter in a DC microgrid under weak grid conditions

Viswanathan,

Jayaramaiah

2024

IJPEDS

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“…While microgrids offer benefits such as dynamic islanding during faults and voltage dips, and improved value proposition for utilities and customers, several technical challenges remain unaddressed. Previous studies have explored control schemes for inverter-based microgrids (8) , variable droop methods for improved frequency control and load sharing (9) , droop control approaches for islanding detection (10) and algorithms to mitigate frequency distortion and voltage drop issues (11) . In gridconnected mode, Phase-Locked Loops (PLLs) are crucial for synchronizing the inverter's output with the grid, ensuring stable power flow, while LCL filters are essential for reducing harmonic distortions and maintaining power quality.…”

Section: Introductionmentioning

confidence: 99%

Small Signal Modelling and Stability Analysis of a Grid Connected Inverted Based Microgrid

Sharma,

Palwalia

2024

IJST

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Objectives: This work focuses on the stability analysis of grid connected microgrids. It considers the impact of load disturbance and grid voltage change on voltage and current levels, as well as reactive and active power responses, is analysed. Methods: A comprehensive small-signal state-space model is developed for an inverter-based microgrid, incorporating submodules of inverters, phase-locked loops (PLLs), and LCL filters. The model is linearized around a stable operating point, and eigenvalue analysis is performed and validated through MATLAB/Simulink simulations. A current controller operating in the d-q frame is proposed to enhance stable power conversion and maintain microgrid stability. Findings: The proposed model and control strategy demonstrate the microgrid's ability to maintain transient voltage stability under severe dynamic conditions. During a 10% grid voltage fluctuation, the microgrid exhibits stable active and reactive power responses, with currents and voltages at the point of common coupling stabilizing within 0.2 seconds. Furthermore, when a 25 kVA active load is disconnected, the microgrid effectively manages the power transition, maintaining stable operation with minimal deviations in key parameters. The current controller simplifies AC current control, integrating active power management from solar input, DC-link voltage stability, and reactive power control. Novelty: The novelty lies in the comprehensive analysis of transient voltage stability in grid-connected microgrids under grid voltage fluctuations and load disturbances, areas that have received limited attention in previous research. By developing a detailed small-signal state-space model incorporating PLL and LCL filter dynamics and proposing a robust control strategy with the current controller, this study offers new insights into enhancing the resilience and reliability of grid-connected microgrids during transient events. Keywords: Microgrid, Small Signal Stability, Voltage Source Inverter, State Space model, Eigen Values

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“…Even if enough EVs are present at the charging station, an V2G may not occur, so would reduce peak power consumption or improve microgrid stability. Even though PV-powered EV charging stations have the potential to increase microgrid stability, there are a number of considerations that must be made [11,12].…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Review of Electric Vehicle Charging Stations with Solar Photovoltaic System Considering Market, Technical Requirements, Network Implications, and Future Challenges

et al. 2023

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Electric cars (EVs) are getting more and more popular across the globe. While comparing traditional utility grid-based EV charging, photovoltaic (PV) powered EV charging may significantly lessen carbon footprints. However, there are not enough charging stations, which limits the global adoption of EVs. More public places are adding EV charging stations as EV use increases. However, using the current utility grid, which is powered by the fossil fuel basing generating system, to charge EVs has an impact on the distribution system and could not be ecologically beneficial. The current electric vehicle (EV) market, technical requirements including recent studies on various topologies of electric vehicle/photovoltaic systems, charging infrastructure as well as control strategies for Power management of electric vehicle/photovoltaic system., and grid implications including electric vehicle and Plug-in hybrid electric vehicles charging systems, are all examined in depth in this paper. The report gives overview of present EV situation as well as a thorough analysis of significant global EV charging and grid connectivity standards. Finally, the challenges and suggestions for future expansion of the infrastructure of EV charging, grid integration, are evaluated and summarized. It has been determined that PV-grid charging has the ability to create a profit. However, due to the limited capacity of the PV as well as the batteries, the Power system may not be cost effective. Furthermore, since PV is intermittent, it is probable that it will not be able to generate enough electricity to meet consumer demand.

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Synchronous Generator Control Concept and Modified Droop for Frequency and Voltage Stability of Microgrid Including Inverter-Based DGs

Cited by 16 publications

References 30 publications

Steady state stability assessment of voltage source converter in a DC microgrid under weak grid conditions

Steady state stability assessment of voltage source converter in a DC microgrid under weak grid conditions

Small Signal Modelling and Stability Analysis of a Grid Connected Inverted Based Microgrid

A Comprehensive Review of Electric Vehicle Charging Stations with Solar Photovoltaic System Considering Market, Technical Requirements, Network Implications, and Future Challenges

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