Voltage Level Increase in Low Voltage Networks through Reactive Power Compensation Using Capacitors

Moldovan, Catalin; Damian, Claudiu; Georgescu, Ovidiu

doi:10.1016/j.proeng.2017.02.459

Cited by 7 publications

(8 citation statements)

References 1 publication

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“…Increasing the tuning parameters of these controllers will increase the convergence speed but will increase along the overshoot more than the one observed in Figure 5 and Figure 6 and will hinder the system stability and the controller's robustness to parameters uncertainties and external disturbances. The controller suggested in this work, however, achieves the same control objectives in the desired settling-time and with less than 2% overshoot (less than 6 V) which is far less than the maximum allowable voltage deviation 10% [34].…”

Section: Comparative Simulation Study 41 Simulation Presentationmentioning

confidence: 83%

“…. For high control efficiency, the droop coefficients are tuned to limit the voltage drop due to primary control to no more than 2%, which is far less than 10% the maximum deviation tolerated for low voltage networks [34]. The microgrid specifications and the loads active and reactive powers are presented in Table.…”

Section: Comparative Simulation Study 41 Simulation Presentationmentioning

confidence: 99%

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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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Section: Comparative Simulation Study 41 Simulation Presentationmentioning

confidence: 83%

Section: Comparative Simulation Study 41 Simulation Presentationmentioning

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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“…The filter parameters and the droop coefficients are summarized in Table I. The droop coefficients are assumed so that the voltage deviations are less than the maximum allowable voltage deviation below 10% [43]. Therefore, to achieve high control performance, the maximum allowable voltage deviation is DV max = 2%.…”

Section: Comparative Simulation Studymentioning

confidence: 99%

Fixed-time Distributed Voltage and Reactive Power Compensation of Islanded Microgrids Using Sliding-mode and Multi-agent Consensus Design

Ghazzali

Haloua

Giri

2022

Journal of Modern Power Systems and Clean Energy

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This paper investigates a fixed-time distributed voltage and reactive power compensation of islanded microgrids using sliding-mode and multi-agent consensus design. A distributed sliding-mode control protocol is proposed to ensure voltage regulation and reference tracking before the desired preset fixed-time despite the unknown disturbances. Accurate reactive power sharings among distributed generators are maintained. The secondary controller is synthesized without the knowledge of any parameter of the microgrid. It is implemented using a sparse one-way communication network modeled as a directed graph. A comparative simulation study is conducted to highlight the performance of the proposed control strategy in comparison with finite-time and asymptotic control systems with load power variations.

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“…The optimizations' constraints are illustrated in Table . As depicted from the table, voltage constraints are set between 0.9 pu and 1.1 pu . PV‐inverter is selected to be between 30% and 100% of peak demand.…”

Section: System Modelingmentioning

confidence: 99%

“…As depicted from the table, voltage constraints are set between 0.9 pu and 1.1 pu. 32 PV-inverter is selected to be between 30% and 100% of peak demand. The maximum BESS output is selected to be 50% of peak demand (3143 kVA).…”

Section: Optimization Constraintsmentioning

confidence: 99%

Optimal placement and sizing of photovoltaics and battery storage in distribution networks

Chedid

Sawwas

2019

Energy Storage

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A two‐step optimization approach is proposed to study the effects of adding a battery energy storage system (BESS) to a distribution network incorporating renewable energy sources. In this article, the first step finds the optimal size and placement of the photovoltaic (PV) arrays that lead to the lowest possible losses, cost and voltage deviation from the reference bus, while the second step starts by performing another optimization in order to find the optimal size and placement of the BESS that lead to a further reduction in the same objectives. The optimized Grid‐PV and Grid‐PV‐BESS configurations are subjected to a time domain power flow so that the annual energy losses and voltage profile of each bus can be observed. The article provides a novel formulation that treats the problem as a multi‐objective optimization and uses the Genetic Algorithm technique to reach optimal configuration in both steps. An Institute of Electrical and Electronic Engineers 13‐Bus test feeder is used to demonstrate the usefulness of the proposed technique.

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Voltage Level Increase in Low Voltage Networks through Reactive Power Compensation Using Capacitors

Cited by 7 publications

References 1 publication

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

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

Fixed-time Distributed Voltage and Reactive Power Compensation of Islanded Microgrids Using Sliding-mode and Multi-agent Consensus Design

Optimal placement and sizing of photovoltaics and battery storage in distribution networks

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