Mitigation of Voltage Unbalances Using a Line Voltage Regulator

Jahn, R. G.; Holt, Mara; Rehtanz, Christian

doi:10.1109/powertech46648.2021.9494930

Cited by 8 publications

(4 citation statements)

References 6 publications

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“…The paper also concluded that there is a direct connection between the output power of the generator and the placement of the SVRs [11]. Another study presents the negative effects of the 1-phase generators on the grid and provides a compensation solution with SVR devices [12].…”

Section: State Of the Art In Series Voltage Regulationmentioning

confidence: 93%

The use of innovative tools in the medium voltage grid development, a case study of series voltage regulator

B. Tozser,

I. Taczi,

A. Torok

2024

RE&PQJ

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The rapid technological improvements concerning the renewable energy sources and the energy policy of the European Union, and the National Energy Strategy are leading to a rapid increase in the number of intermittent renewable power plants. Thus, new challenges emerge in the operation of the distribution system. To operate the system efficiently, the use of innovative technologies must be considered, because conventional network development strategies cannot always provide an optimal solution for the problem. This paper analyses the effects of largescale wind power generation on a medium voltage system and a solution of the problems faced through a case study of a serial voltage regulator. The difference between the profiles of generation and loads causes the residential transformers at the end of the line to encounter large, more than 8% voltage fluctuation. To assess the site’s voltage profile, time series symmetrical load flow calculations were performed. After the thorough analysis of the circumstances a serial voltage regulator device was implemented at 3 different nodes of the system and a placement analysis was carried out with statistical tools. The results showed a 3% decrease in the voltage fluctuation at the end of the line even when the device was far from these nodes; and with an optimal placement, the device could halve the largest voltage fluctuation on the line.

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Section: State Of the Art In Series Voltage Regulationmentioning

confidence: 93%

The use of innovative tools in the medium voltage grid development, a case study of series voltage regulator

B. Tozser,

I. Taczi,

A. Torok

2024

RE&PQJ

View full text Add to dashboard Cite

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“…In ref. [57], technical capabilities of the LVR, OLTC, and zig‐zag load balancer (ZZ‐LB) with regard to voltage regulation, voltage unbalance compensation, and increase in hosting capacity are evaluated in order to determine feasible alternatives for grid reinforcements. The authors have conducted studies considering an unbalanced load or a generator connection at different locations along the line and at the end of the line in order to investigate the voltage unbalance impacts.…”

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

confidence: 99%

“…The passive strategy [52][53][54][55][56] utilises capacitive shunt compensation as well as phase balancing without deploying power electronic devices to correct load unbalance and overloads in the distribution network. In contrast, the active strategy exploits a capability of power electronics such as line voltage regulator (LVR) [57], advanced on-load tap changer (OLTC) [58][59][60][61], reactive power compensator (RC) [62,63], zero sequence current compensator (ZSCC) [64], distributed static synchronous compensator (DSTATCOM) [65][66][67][68][69][70][71], dynamic voltage restorer (DVR) [72][73][74][75][76][77], unified power quality conditioner (UPQC) [78][79][80][81][82][83] to compensate voltage unbalance. Since this power electronics equipment is expensive leading to additional investment cost, they are therefore scarcely deployed in LVDN.…”

Section: Voltage Unbalance Compensationmentioning

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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