Stochastic control for optimal power flow in islanded microgrid

Diep-Thanh, Thang; Nguyen-Phung, Quang; Nguyen-Duc, Huy

doi:10.11591/ijece.v9i2.pp1045-1057

Cited by 4 publications

(3 citation statements)

References 19 publications

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“…In the unit-commitment formulation, a stochastic approach is used, particularly, the authors in [7] report about the use of scenarios for generation with distribution probability functions, the demand is considered constant. Formulations with a stochastic approach has been suggested to manage wind power uncertainty in power system operation [8][9][10][11] and in microgrids in [12]. The flexibility in power system operation will be a critical issue under high penetration of wind power to deal with uncertainty and intermittency.…”

Section: Introductionmentioning

confidence: 99%

Quantification of operating reserves with high penetration of wind power considering extreme values

Obando¹,

González²,

Moreno³

2020

IJECE

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The high integration of wind energy in power systems requires operating reserves to ensure the reliability and security in the operation. The intermittency and volatility in wind power sets a challenge for day-ahead dispatching in order to schedule generation resources. Therefore, the quantification of operating reserves is addressed in this paper using extreme values through Monte-Carlo simulations. The uncertainty in wind power forecasting is captured by a generalized extreme value distribution to generate scenarios. The day-ahead dispatching model is formulated as a mixed-integer linear quadratic problem including ramping constraints. This approach is tested in the IEEE-118 bus test system including integration of wind power in the system. The results represent the range of values for operating reserves in day-ahead dispatching.

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Section: Introductionmentioning

confidence: 99%

Quantification of operating reserves with high penetration of wind power considering extreme values

Obando¹,

González²,

Moreno³

2020

IJECE

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“…Two main approaches were suggested for microgrids control: centralized and distributed control. Centralized control has been extensively used in literature for both AC and DC microgrids control [3][4][5][6][7][8][9][10][11][12][13] including secondary control [3][4][5] and power management [6][7][8] among others [9][10][11][12][13]. Distributed control is a modern control approach developed as a natural solution for the naturally distributed systems as a more reliable control strategy, since the control is geographically distributed along with the system.…”

Section: Introductionmentioning

confidence: 99%

Fixed-time observer-based distributed secondary voltage and frequency control of islanded AC microgrids

Ghazzali

Haloua

Giri

2020

IJECE

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This paper deals with the problem of voltage and frequency control of distributed generators (DGs) in AC islanded microgrids. The main motivation of this work is to obviate the shortcomings of conventional centralized and distributed control of micro-grids by providing a better alternative control strategy with better control performance than state-of-the art approaches. A distributed secondary control protocol based on a novel fixed-time observer-based feedback control method is designed for fixed-time frequency and voltage reference tracking and disturbance rejection. Compared to the existing secondary microgrid controllers, the proposed control strategy ensures frequency and voltage reference tracking and disturbance rejection before the desired fixed-time despite the microgrid initial conditions, parameters uncertainties and the unknown disturbances. Also, the controllers design and tuning is simple, straightfor-ward and model-free.i.e, the knowledge of the microgrid parameters, topology, loads or transmission lines impedance are not needed in the design procedure. The use of distributed control approach enhances the reliability of the system by making the control system geographically distributed along with the power sources, by using the neighboring DGs informations instead of the DG’s local informations only and by cooperatively rejecting external disturbances and maintaining the frequency and the voltage at their reference values at any point of the microgrid. The efficiency of the proposed approach is verified by comparing its performance in reference tracking and its robustness to load power variations to some of the works in literature that addressed distributed secondary voltage and frequency control.

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“…In [17], the energy storage systems and DR are introduced to the traditional scheduling model of wind and thermal power with carbon emission trading for reducing the influence of random nature of wind power on system operation. From the above literature review, it can be observed that there is a pressing requirement for an optimal operation of MG considering the RESs, BES systems, EVs and DR [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Optimal operation management of grid-connected microgrids under uncertainty

Salkuti

2019

IJEECS

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<span>This paper proposes a new optimal operation of Microgrids (MGs) in a distribution system with wind energy generators (WEGs), solar photovoltaic (PV) energy systems, battery energy storage (BES) systems, electric vehicles (EVs) and demand response (DR). To reduce the fluctuations of wind, solar PV powers and load demands, the BES systems and DR are utilized in the proposed hybrid system. The detailed modeling of WEGs, solar PV units, load demands, BES systems and EVs has been presented in this paper. The objective considered here is the minimization of total operating cost of microgrid, and it is formulated by considering the cost of power exchange between the main power grid and microgrid, cost of wind and solar PV energy systems, cost of BES systems, EVs and the cost due to the DR in the system. Simulations are performed on a test microgrid, and they are implemented using GAMS software. Various case studies are performed with and without considering the proposed hybrid system.</span>

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Stochastic control for optimal power flow in islanded microgrid

Cited by 4 publications

References 19 publications

Quantification of operating reserves with high penetration of wind power considering extreme values

Quantification of operating reserves with high penetration of wind power considering extreme values

Fixed-time observer-based distributed secondary voltage and frequency control of islanded AC microgrids

Optimal operation management of grid-connected microgrids under uncertainty

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