Distributed cooperative control system for smart microgrids

Hamidi, Reza Jalilzadeh; Livani, Hanif; Hosseinian, Seyed Hossein; Gharehpetian, Gevork B.

doi:10.1016/j.epsr.2015.09.012

Cited by 40 publications

(24 citation statements)

References 28 publications

(73 reference statements)

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“…To respond to the variation in system load, the droop control gains are controlled to provide a proper power-sharing between DGs. 47 The proposed traditional controller will be applied to set the voltage and frequency to their predetermined limits in Section 4.…”

Section: Traditional Control Methodsmentioning

confidence: 99%

“…The equations for calculating the fundamental reactive and active power and the droop controller equations are expressed in previous studies. [47][48][49][50] The droop controller output is a small signal variation of the reference voltage v * odq and a frequency ω. The state space modeling of the power control loop is expressed in (1) and (2).…”

Section: H∞ Repetitive Power Control Schemementioning

confidence: 99%

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A multistage H‐infinity–based controller for adjusting voltage and frequency and improving power quality in islanded microgrids

Sedhom

El‐Saadawi

Hatata

et al. 2019

Int Trans Electr Energ Syst

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Summary This paper proposes a novel methodology for controlling voltage and frequency of islanded microgrids and meanwhile improving the system power quality. The proposed methodology is based on applying a multi‐stage H‐Infinity (H∞) controller with different control loops to restore the nominal values of voltage and frequency after any load variation. These control loops include power control, current control, and voltage control loops. The H∞ is also applied with an LCL filter to enhance the system power quality. The proposed controller is applied to a test system under three different loading conditions and the obtained results are compared with that obtained by applying the model predictive control (MPC) method. The results are compared with that obtained by applying a proposed traditional control method in the same test system. A comparison between the droop controller and the proposed controller, MPC is performed based on fitness value, controller response time, and maximum frequency deviation. In addition, the system stability is analysed using root locus, system step response, singular value decomposition, and bode diagram. The results prove the effectiveness and the efficiency of the proposed method in restoring voltage and frequency and improving the system power quality.

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Section: Traditional Control Methodsmentioning

confidence: 99%

Section: H∞ Repetitive Power Control Schemementioning

confidence: 99%

A multistage H‐infinity–based controller for adjusting voltage and frequency and improving power quality in islanded microgrids

Sedhom

El‐Saadawi

Hatata

et al. 2019

Int Trans Electr Energ Syst

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show abstract

“…The differential algebraic equations (DAE) for the voltage controller have been derived and given as [41,42,37,43]:…”

Section: Voltage Controllermentioning

confidence: 99%

Coordinated control of three-phase AC and DC type EV–ESSs for efficient hybrid microgrid operations

Rahman

Hossain

2016

Energy Conversion and Management

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a b s t r a c tThis paper presents a three-layered coordinated control to incorporate three-phase (3P) alternating current (AC) and direct current (DC) type electric vehicle energy storage systems (EV-ESSs) for improved hybrid AC/DC microgrid operations. The first layer of the algorithm ensures DC subgrid management by regulating the DC bus voltage and DC side power management. The second and third layer manages AC subgrid by regulating the AC bus voltage and the frequency by managing reactive and active power respectively. The multi-layered coordination is embedded into the microgrid central controller (MGCC) which controls the interlinking controller in between AC and DC microgrid and the interfacing controllers of the participating electric vehicles (EVs) and distributed generation (DG) units. The whole system is designed in MATLAB/SIMULINK Ò environment resembling the under construction microgrid at Griffith University, Australia. Extensive case studies are performed using real life irradiation data and commercial loads of the campus buildings. Impacts of homogeneous and heterogeneous single-phase EV charging are investigated to observe both balanced and unbalanced scenarios. Synchronization during the transition from the islanded to grid-tied mode is tested considering a contingency situation. From the comparative simulation results it is evident that the proposed controller exhibits effective, reliable and robust performance for all the cases.

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“…Hence, in this paper, we studied the effects of reclosers and proposed an approach based on the Monte Carlo method to set reclosers in distribution networks. The method is also applicable to be implemented in smart micro-grids since the energy resiliency is highly considered in smart grids [18][19][20][21]. The objective of the proposed method is minimization of total outage costs by establishing a trade-off between transient and permanent outages.…”

Section: Introductionmentioning

confidence: 99%

Optimal Recloser Setting, Considering Reliability and Power Quality in Distribution Networks

Azari¹,

Chitsazan²,

Niazazari³

2017

EPES

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Reclosers and fuses are the commonplace protective devices in distribution networks. A recloser can prevent long-time outages by clearing temporary faults before operation of the fuses in the system. Thus, it decreases the rate of long-term outages and improves system reliability and power quality. Despite positive features of reclosers, each operation of a recloser causes a momentary voltage interruption that exacerbates power quality. Nowadays, power quality issues have become more important because of the increasing use of sensitive equipment to voltage interruptions. According to the mentioned concerns, it seems necessary to set reclosers to strike a balance between power quality and the effectiveness of fuse saving scheme. Thus, we proposed a method to set reclosers. Due to the random nature of faults, the proposed method is stochastic based on the Monte Carlo method. The proposed method determines the optimal number of operations, reclosing intervals, and protection zones. The proposed method efficiency is evaluated according to the simulation results, and the proposed method is capable of establishing an optimal trade-off between power quality and protection efficiency.

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Distributed cooperative control system for smart microgrids

Cited by 40 publications

References 28 publications

A multistage H‐infinity–based controller for adjusting voltage and frequency and improving power quality in islanded microgrids

A multistage H‐infinity–based controller for adjusting voltage and frequency and improving power quality in islanded microgrids

Coordinated control of three-phase AC and DC type EV–ESSs for efficient hybrid microgrid operations

Optimal Recloser Setting, Considering Reliability and Power Quality in Distribution Networks

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