Enhanced Reactive Power Sharing and Voltage Restoration Based on Adaptive Virtual Impedance and Consensus Algorithm

Keddar, Mohamed; Doumbia, Mamadou Lamine; Belmokhtar, K.; Krachai, M. Della

doi:10.3390/en15103480

Cited by 7 publications

(3 citation statements)

References 20 publications

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“…In contrast, the reactive power sharing, voltage restoration, and online tuning control gains of PI controllers were not addressed in references [29,30]. Uneven sharing of reactive power caused by a mismatch in line impedance is addressed in [31] by proposing a virtual impedance controller with consensusbased adaptation. To adjust the reactive power mismatch, a consensus algorithm is employed, and a term to correct impedance virtualization is produced via a PI controller to eliminate a mismatch in line impedance.…”

Section: Introductionmentioning

confidence: 99%

Consensus-Based Intelligent Distributed Secondary Control for Multiagent Islanded Microgrid

Jasim

Aymen

et al. 2023

International Transactions on Electrical Energy Systems

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Isolated microgrids (MGs) face challenges in performance stability and active/reactive power sharing as a result of frequency/voltage deviations and mismatched line impedance issues. In this paper, a consensus-based multiagent system (MAS) is proposed as a solution to restore voltage/frequency deviations and enable true power sharing. The invention of an Intelligent Distributed Secondary Control Scheme (IDSCS) can efficiently achieve hoped-for outcomes. The proposed IDSCS features estimation and compensation sublayers. For the estimation sublayer, discrete dynamic consensus algorithm-based state estimators are presented to collect average information of frequency, voltage, and reactive power. Each DG is viewed as an agent sharing information with its immediate neighbors through a sparse cyber communication network. In the compensation sublayer, online tuned proportional integral (PI) controllers using artificial neural networks (ANNs) are proposed as an intelligent voltage and frequency compensators. This combination uses the simplicity of the PI controller mathematical formula and ANN’s ability to deal with parameter variations and nonlinearity. Due to the global nature of the frequency parameter, the active power-sharing compensator is unnecessary. For compensating reactive power deviations, ANNs-based reactive power controllers are proposed. Furthermore, at the primary control level, the proposed strategy employs discrete-time proportional resonant (PR) controllers in a stationary reference frame, eliminating the need for any α β / d q or d q / α β transformations. Distributed implementation of the proposed method guarantees system scalability without MG topology or demand pattern expertise. The control scheme was validated using hypothetical MAS in MATLAB Simulink platform. The simulation findings indicate the proposed MG system can effectively distribute power among the DGs while maintaining voltage and frequency stable.

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Section: Introductionmentioning

confidence: 99%

Consensus-Based Intelligent Distributed Secondary Control for Multiagent Islanded Microgrid

Jasim

Aymen

et al. 2023

International Transactions on Electrical Energy Systems

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“…Among the suggested solutions, some are based on the usage of electrical storage [ 1 , 2 , 3 , 4 ], and some of them apply power flow dispatch at generating facilities [ 5 , 6 ]. Other solutions are based on the utilization of reactive power equipment [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. Considering the influence of the high costs of high-voltage storage, reactive power usage as the voltage regulation model may be preferable among other methods.…”

Section: Introductionmentioning

confidence: 99%

The Actual Exactness of a Fast RMS Correction during Abrupt Voltage Change

Danin

Amiel

Miteva

et al. 2023

Sensors

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The requirement of RMS (voltage and current) measurements under a fraction of the AC period has become increasingly attractive in power systems. Some of these power applications are responsible for voltage stabilization in distribution lines when the voltage correction should be made in a short time, no more than one or two periods of the AC signal. Previously developed RMS correction applications must be validated in real-world situations characterized by an abrupt change (discontinuity) in voltage magnitude occurring even during a single AC period. Such circumstances can substantially influence the RMS estimation and, therefore, should be considered. This article suggests a mathematically based approach, validated in the laboratory, that improves the accuracy of a voltage RMS estimation for the appropriate measurement devices. It produces better results in cases where the RMS assessment should be done in a fraction of the AC period.

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“…Te autonomous dissemination of power is shaped through a classical decentralized droop control scheme, but power sharing gets disturbed due to dependency on network parameters and line impedance mismatch. To tackle this efect, a consensus-based approach is adopted to eliminate the line impedance mismatch by incorporating the correction term of virtual impedance produced by the PI controller [15]. An improved droop control is designed based on dual ascent algorithm to maintain an optimal allocation of power [16].…”

Section: Introductionmentioning

confidence: 99%

Conservation Voltage Reduction Strategy for Autonomous Microgrid with Improved Voltage-CurrentDroop-Based Inverter Control Framework

Jha

Kumar

Samantaray

2023

International Transactions on Electrical Energy Systems

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In a conventional AC distribution system, the conservation voltage reduction (CVR) strategy is widely employed to lower down the voltage of specific load to lower the power consumption. The wide applicability of demand side management (DSM) using CVR in a stand-alone microgrid through VSI-based energy sources is a thrust area, that is, not examined yet and needs to be explored. The fast dynamics and flexible control are the characteristics of the voltage-current droop method which further increases the inertia of the voltage source inverter. For utilizing these advantages of this droop method, it is required to determine the accurate droop gain to properly coordinate the distribution of power among DGs. In this paper, the voltage-current droop method is utilized to carry out the function of DSM, and a modified droop computation method for voltage-current droop is formulated to determine the impedance from initial of the DG point to the downstream end for multifeeder network. As most of the droop control techniques emulate the conventional power grid such as Q-V droop control which reduces voltage with the increase of reactive power, the research prospect is very high in devising the new droop computation method for voltage-current droop for accurate control of power. In addition to it, the work is extended to apply the benefits of voltage-current droop to execute DSM strategy in standalone MG. Moreover, the capability of the proposed estimation of droop parameter is implemented on a standalone 5-bus single-feeder multi-DGs network, and furthermore, the scheme is applied to IEEE-9 bus multifeeder multi-DGs network to show the applicability of the proposed scheme. The simulation results produced from MATLAB/Simulink are compared with the decentralized power-based droop method and conventional voltage-current droop technique to analyse the performance of the devised scheme.

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Enhanced Reactive Power Sharing and Voltage Restoration Based on Adaptive Virtual Impedance and Consensus Algorithm

Cited by 7 publications

References 20 publications

Consensus-Based Intelligent Distributed Secondary Control for Multiagent Islanded Microgrid

Consensus-Based Intelligent Distributed Secondary Control for Multiagent Islanded Microgrid

The Actual Exactness of a Fast RMS Correction during Abrupt Voltage Change

Conservation Voltage Reduction Strategy for Autonomous Microgrid with Improved Voltage-CurrentDroop-Based Inverter Control Framework

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