A comprehensive voltage control strategy with voltage flicker compensation for highly PV penetrated distribution networks

Arshad, Ammar; Lehtonen, Matti

doi:10.1016/j.epsr.2019.02.019

Cited by 22 publications

(22 citation statements)

References 17 publications

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“…The study [22] validated the ability of the conventional inverter to control active and reactive power independently under different methodologies. The literature [23,24] developed three complementary levels of voltage control to tackle the voltage deviation problem. The lower-level deals with the sudden flicking through reactive power to offset the active power so that the change in the voltage is kept constant.…”

Section: A Related Workmentioning

confidence: 99%

A Novel Cooperative Control Strategy to Mitigate PV Power Fluctuation and Increase its Penetration

Alsharif

2021

IEEE Access

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This paper proposes a novel optimization-based power sharing control strategy to moderate PV power intermittency and increase its penetration. Such a control strategy aims to minimize the total PV power sensitivity to the light change by re-distributing the demand power among available PV units such that the demanding power met with minimal variation. PV plant is coupled with the grid utility, and it should maintain a specific amount of power determined by the grid operator. However, due to the PV power sensitivity to the light, the delivered power at the coupling point fluctuates and leads to undesirable responses such as grid frequency excursion, stability problems, and unoptimized power generation. To address such issues, we formulate an optimization problem to reduce the total PV power sensitivity by selecting the optimal reference voltage for each PV panel. We define the power sensitivity as the rate of power change to light fluctuation to be the objective function of the proposed optimization problem, and the selected reference voltages for all PV panels are the decision variables. Compared to other conventional power-sharing techniques such as the same utilization level, droop control, and lookup table, MATLAB simulation results verify the contribution of the proposed algorithm's performance superiority in PV power sensitivity reduction, grid stability assurance, and power generation enhancement. Moreover, when there is insufficient PV power to meet the grid operator's demand, the proposed algorithm automatically sets the entire PV plant to work at its MPP without switching circuits.

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Section: A Related Workmentioning

confidence: 99%

A Novel Cooperative Control Strategy to Mitigate PV Power Fluctuation and Increase its Penetration

Alsharif

2021

IEEE Access

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“…The proposed strategy employs voltage source converters to improve the Power Quality, coupling inductor to decrease harmonics in grid current and RC filter for reducing higher-order harmonics. The inverter's local voltage control mechanism is discussed in [130] that reacts instantly to minimize the fast voltage fluctuations and hence flicker in the analysis of a 33-bus MV distribution system. The control strategy defined in this study resulted in the maximum long-term flicker index value (0.1938) to be 57% less than the base case value (0.4466) without any control.…”

Section: Power Quality Compensation (Harmonics Unbalance Flicker)mentioning

confidence: 99%

Review on the PV Hosting Capacity in Distribution Networks

2020

Self Cite

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The increasing penetration of Photovoltaic (PV) generation results in challenges regarding network operation, management and planning. Correspondingly, Distribution Network Operators (DNOs) are in the need of totally new understanding. The establishment of comprehensive standards for maximum PV integration into the network, without adversely impacting the normal operating conditions, is also needed. This review article provides an extensive review of the Hosting Capacity (HC) definitions based on different references and estimated HC with actual figures in different geographical areas and network conditions. Moreover, a comprehensive review of limiting factors and improvement methods for HC is presented along with voltage rise limits of different countries under PV integration. Peak load is the major reference used for HC definition and the prime limiting constraint for PV HC is the voltage violations. However, the varying definitions in different references lead to the conclusion that, neither the reference values nor the limiting factors are unique values and HC can alter depending on the reference, network conditions, topology, location, and PV deployment scenario.

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“…In case of large nonlinear loads, harmonic content should be decreased using passive or active power filters which are an expensive solution, so ILCs can be effectively used to suppress harmonic currents imposed by nonlinear loads. The ILCs can contribute to voltage stability improvement [3,4], voltage unbalance compensation [5,6], flicker mitigation [7], harmonic compensation [8][9][10] and reactive power compensation [11] in MGs and distribution networks. As the number of nonlinear loads is growing rapidly in distribution systems, ILC harmonics compensation plays an interesting and important role.…”

Section: Introductionmentioning

confidence: 99%

Hybrid energy storage system control analogous to power quality enhancement operation of interlinking converters

Hajiaghasi

Salemnia

Hamzeh³

2021

IJECE

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Increasing nonlinear loads and power electronic converters lead to various power quality issues in microgrids (MGs). The interlinking converters (ILCs) can participate in these systems to harmonic control and power quality enhancement. However, ILC participation deteriorates the dc link voltage, system stability, and storage lifetime due to oscillatory current phenomena. To address these problems, a new control strategy for a hybrid energy storage system (HESS) is proposed to eliminate the adverse effects of the harmonic control operation of ILC. Specifically, battery and super-capacitor (SC) are used as HESSs that provide low and high power frequency load, respectively. The proposed strategy tries to compensate the current oscillation imposed by ILC with fuzzy control of HESS. In this method, a proportional-resonant (PR) controller integrated with harmonic compensator (HC) is employed to control the ILC for power quality enhancement and oscillatory current elimination. The main advantages of the proposed strategy are to reduce DGs power ﬂuctuations, precise DC bus voltage regulation for generation and load disturbances, improved grid power quality under nonlinear load and transition conditions. The performance of the proposed method for isolated and grid-connected modes is verified using simulation studies in the MATLAB software environment.

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A comprehensive voltage control strategy with voltage flicker compensation for highly PV penetrated distribution networks

Cited by 22 publications

References 17 publications

A Novel Cooperative Control Strategy to Mitigate PV Power Fluctuation and Increase its Penetration

A Novel Cooperative Control Strategy to Mitigate PV Power Fluctuation and Increase its Penetration

Review on the PV Hosting Capacity in Distribution Networks

Hybrid energy storage system control analogous to power quality enhancement operation of interlinking converters

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