Comprehensive Modelling and Small Signal Stability Analysis of RES-based Microgrid

Krismanto, Awan Uji; Mithulananthan, N.; Lee, Kwang Y.

doi:10.1016/j.ifacol.2015.12.391

Cited by 12 publications

(21 citation statements)

References 11 publications

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“…The small-signal and transient stabilities in the presence of DFIGs equipped with power system stabilizers were investigated in Bhukya and Mahajan. 21 The small-signal stability of the microgrids was studied in previous studies [22][23][24] considering renewable resources and the model of the hybrid system, including solar as well as wind generators. However, few studies have been conducted in the simultaneous examination of the effects of WT and SOFC on the stability of the hybrid power system.…”

Section: Literature Reviewmentioning

confidence: 99%

“…The direct and quadrature components are depicted by d and q indices, and indices s and r refer to stator and rotor frameworks. In (19) to (22), ω s is the synchronous speed and ω r is the rotational speed of the rotor, V wdr and V wqr are the rotor voltages, and i wdr and i wqr are rotor currents given in (23) and (24):…”

Section: Modeling a Wt Based On Dfigmentioning

confidence: 99%

“…The small‐signal stability of the microgrids was studied in previous studies considering renewable resources and the model of the hybrid system, including solar as well as wind generators. However, few studies have been conducted in the simultaneous examination of the effects of WT and SOFC on the stability of the hybrid power system.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modeling of integrated power system with wind turbine based on a doubly fed induction generator and solid oxide fuel cell for small‐signal stability analysis

Safari

Badr

Farrokhifar

2019

Int Trans Electr Energ Syst

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Summary This paper aims to propose the small‐signal model of a wind turbine (WT) based on a doubly fed induction generator (DFIG) and a solid oxide fuel cell (SOFC) into the transmission network for dynamic stability analysis of the integrated system. The principal goal is to introduce the novel small‐signal model of the hybrid power system in the presence of the WT and SOFC power plants for analyzing of electromechanical oscillations. Therefore, the modeling of each generation unit of the integrated system in the same framework is illustrated. Besides, a comprehensive mathematical model is demonstrated from WT and SOFC units integrated with a synchronous generator (SG) and the infinite bus system. Based on the proposed model, the linear analysis is illustrated under different conditions for stability studies. Moreover, this study presents the influence of different portions of WT and SOFC units on the small‐signal stability. The simulation results represent the performance of the suggested model.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Modeling a Wt Based On Dfigmentioning

confidence: 99%

See 1 more Smart Citation

Modeling of integrated power system with wind turbine based on a doubly fed induction generator and solid oxide fuel cell for small‐signal stability analysis

Safari

Badr

Farrokhifar

2019

Int Trans Electr Energ Syst

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“…Even though the RES uncertainties are a key element in MG stability, only a few works investigated probabilistic small signal stability in autonomous MG. Most of the research presented stability analysis of the MG under variation of the power-sharing scheme in a specific range of droop gain parameters [14,15,[17][18][19]. For MG design and planning purposes, it is important to determine the risk of instability under different MG operating points.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, how the RES uncertainties affect the powersharing scheme and dynamic response of the MG should be carefully investigated. The main concern in observing the uncertainties in the MG is how to incorporate stochastic features of RES into a developed comprehensive model MG in [17,19], to provide a complete picture of MG dynamic behaviour when it is operated under uncertain operating points. Another concern in presenting statistical analysis from the probabilistic small signal stability study is how to extract the investigated critical modes from a large number of eigenvalue data.…”

Section: Introductionmentioning

confidence: 99%

Oscillatory stability assessment of microgrid in autonomous operation with uncertainties

Krismanto

Mithulananthan

Kamwa

2018

IET Renewable Power Generation

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One of the main challenges of the microgrid (MG) operation in autonomous mode is the uncertain output due to the fluctuating nature of renewable energy resources (RES). This study investigates the effects of RES uncertainties to the oscillatory stability of a hybrid MG in islanded operation. A comprehensive model of Wind Energy Conversion System (WECS), a two-stage Photovoltaic (PV) and bio-diesel engine (BDE) based distributed generation (DG) units are considered to capture a complete dynamic response of the hybrid MG. Trajectories and distribution of damping ratios and oscillatory frequencies of the critical modes were thoroughly investigated through Monte Carlo simulation considering wind speed and solar irradiance uncertainties. From the probabilistic study, it was observed that the presence of RES variations results in a dynamic change of power-sharing strategies and introduce an adverse effect on small signal stability. Uncertain condition of wind speed brings more deterioration in system damping than solar irradiation variation. From time domain simulation, it was confirmed that at higher wind speed, damping on the critical modes reduced. As a consequence, the hybrid MG experienced more oscillatory conditions and even lead to unstable situation at high wind speed conditions. While with solar irradiance change, the investigated MG system can maintain its stable operation.

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Stability of Renewable Energy based Microgrid in Autonomous Operation

Krismanto

Mithulananthan

Krause

2018

Sustainable Energy, Grids and Networks

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This paper develops a comprehensive small-signal model of hybrid renewable-energy-based microgrid (MG) in an attempt to perceive oscillatory stability performance and capture the potential interaction between low-frequency critical modes within the MG. Trajectories of sensitive modes due to controller gain variations were evaluated in order to determine the stability boundaries. It was noticeable that various power-sharing schemes significantly influenced the small-signal stability of MG. Moreover, modal interaction emerged due to the proximity of RES-based DG units and non-linear dynamic behaviour of the sensitive modes. The interaction may result in a more oscillatory situation which potentially leads to instability of MG. The low-frequency critical modes obtained from eigenvalues analysis were then verified with the help of nonlinear time domain simulations. The presented work contributes to enhance the design and tuning of controller gain and proposes appropriate power-sharing scheme within MG.

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Comprehensive Modelling and Small Signal Stability Analysis of RES-based Microgrid

Cited by 12 publications

References 11 publications

Modeling of integrated power system with wind turbine based on a doubly fed induction generator and solid oxide fuel cell for small‐signal stability analysis

Modeling of integrated power system with wind turbine based on a doubly fed induction generator and solid oxide fuel cell for small‐signal stability analysis

Oscillatory stability assessment of microgrid in autonomous operation with uncertainties

Stability of Renewable Energy based Microgrid in Autonomous Operation

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