Voltage support control of unbalanced distribution systems by reactive power regulation

Calderaro, Vito; Galdi, Vincenzo; Lamberti, Francesco; Piccolo, Antonio; Graditi, Giorgio

doi:10.1109/isgteurope.2014.7028911

Cited by 7 publications

(5 citation statements)

References 16 publications

(15 reference statements)

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“…The consequence of this reactive power compensation demonstrated in ref. [98] is the increase of the entire network losses by 24 kWh for the whole day, whereas the VUF is reduced significantly. It is important to note that the proposed method [98] cannot guarantee that the voltage unbalance compensation will be achieved for all unbalance conditions.…”

Section: Summary Of Existing Solutions For the Voltage Unbalance Comp...mentioning

confidence: 99%

“…[98] is the increase of the entire network losses by 24 kWh for the whole day, whereas the VUF is reduced significantly. It is important to note that the proposed method [98] cannot guarantee that the voltage unbalance compensation will be achieved for all unbalance conditions. This is because this method is only activated when the measured line‐to‐line voltage is greater than the reference voltage.…”

Section: Summary Of Existing Solutions For the Voltage Unbalance Comp...mentioning

confidence: 99%

“…The rest of the active strategies for voltage unbalance compensation is basically relied on the use of either three‐phase or single‐phase DERs. Various voltage unbalance compensation strategies are based on the three‐phase DERs utilisation [84–107] as an alternative and economical solution by simply oversizing the inverter capacities to provide the compensation capability. The virtual impedance control [84–90] of the three‐phase DERs has been developed to compensate for the voltage unbalance and improve power‐sharing in a microgrid.…”

Section: Introductionmentioning

confidence: 99%

“…The sensitivity analysis method is demonstrated in ref. [98] to provide the most appropriate reactive power compensation on each phase in order to mitigate the voltage unbalance, while considering the reactive power capability curves of DER units, which are wind turbines in this case. The reactive power contribution (compensation) is determined from the inverse of the sensitivity matrix (i.e.…”

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confidence: 99%

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Comprehensive review and a novel technique on voltage unbalance compensation

2023

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Voltage unbalance has gained more attention due to a rapid increase in single-phase distributed energy resources (DERs) penetration compound with existing unbalance characteristics of low voltage distribution network. The purposes of this article are to summarise various techniques on voltage unbalance compensation from three different strategies: (1) techniques based on passive approach and advanced power electronics; (2) Techniques based on three-phase DERs; (3) techniques based on single-phase DERs. In addition, a novel voltage unbalance compensation technique that applies a voltage sensitivity analysis along with a symmetrical component concept to meet a desired voltage unbalance factor (VUF) is introduced in this article. Coordination among single-phase DERs that contributes in the voltage unbalance compensation is also considered. In order to evaluate the effectiveness of this proposed technique, its results are compared with the results that are obtained using a current unbalance compensation strategy. The results indicate that the novel technique proposed in this study provides more stable voltage unbalance compensation while successfully achieving the specified VUF thresholds. K E Y W O R D Sdistribution networks, electric vehicles, photovoltaic power systems, quality control, reactive power control, renewable energy sources, voltage controlThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Summary Of Existing Solutions For the Voltage Unbalance Comp...mentioning

confidence: 99%

Section: Summary Of Existing Solutions For the Voltage Unbalance Comp...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Comprehensive review and a novel technique on voltage unbalance compensation

2023

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“…Enhancement of unbalanced radial distribution systems (URDS) regarding voltage control, stability, and profile is discussed in [20][21][22][23][24]. In [25,26], renewable energy-based DG allocation in URDS is discussed.…”

Section: Introductinmentioning

confidence: 99%

Crow Search Algorithm for Allocation of Multi-Type Distributed Generation in Unbalanced Radial Distribution System

El-Saeed

El‐Hameed

AbdElGwaad

2018

The Egyptian International Journal of Engineering Sciences and

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Optimal allocation of multiple-type distributed generators in unbalanced radial distribution systems is proposed in this article. Reduction of system total losses along with voltage profile enhancement represent the objectives of such multiple distributed generator allocation. Three types of distributed generator with different abilities to generate or consume reactive power are considered in this study. Photovoltaic based distributed generator can be synchronized with each phase independently; therefore, single-phase distribution of Photovoltaic is examined in this article. To reduce the searching effort especially with large systems, candidate locations are picked up first depending on a voltage-total real line loss index. Then, sizes of these three types of distributed generator are found by applying crow search algorithm, where a constrained optimization problem with voltage profile and loss indices as the objectives is constructed. The proposed method is applied on IEEE 13bus, 34-bus and 123-bus unbalanced radial distribution systems. Numerical results realized by crow search algorithm are compared with those obtained by the artificial bee colony method. Analysis of the three systems indicates that the proposed allocation methods are effective in reducing total active power losses and in improving the voltage profile.

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