Assessment of Voltage Dips based on Field Measurements in MV Networks

Weldemariam, Leake Le; Papathanasiou, F Fotios; Ćuk, V.; Cobben, Jfg Sjef; Kling, WL Wil

doi:10.24084/repqj13.365

Cited by 5 publications

(4 citation statements)

References 4 publications

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“…As recommended by the IEC 61000‐4‐30, RMS voltage characteristics as a function of time of the voltage events are obtained using the half‐cycle sliding window method. Regarding the data used, phase‐to‐ground voltages are monitored in the MV networks while the end‐users are essentially influenced by voltage dips associated to the phase‐to‐phase voltages . The characteristics of phase‐to‐phase voltages as a function of time are obtained for each event from the waveforms of phase‐to‐ground voltages.…”

Section: Important Aspects For Building Voltage Dip Regulationmentioning

confidence: 99%

“…Regarding the data used, phase-to-ground voltages are monitored in the MV networks while the end-users are essentially influenced by voltage dips associated to the phase-to-phase voltages. 31,33 The characteristics of phase-to-phase voltages as a function of time are obtained for each event from the waveforms of phase-to-ground voltages. In this way, the effect of propagation on the number and severity of voltage dips at the customer terminals will be taken into account.…”

Section: Assessing and Presenting Voltage Dipsmentioning

confidence: 99%

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A proposal on voltage dip regulation for the Dutch MV distribution networks

Weldemariam

Ćuk

Cobben

2018

Int Trans Electr Energ Syst

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Summary Voltage quality regulation has been an ongoing discussion in many countries in the world to set up a regulatory framework where also voltage dips are included in the national grid codes. Regarding voltage dips, the regulatory framework is useful for establishing the coordination between the network operators, the equipment manufacturers, and the customers. The voltage dip regulation can provide benefits for the involved parties. By defining the responsibilities for the network operators and the customers, it can help distribution system operators to evaluate the quality of supply voltage and to take possible measures when the number of dips exceed the reference values defined in the regulation. The regulatory framework can also help customers to make an economic analysis for choosing appropriate mitigation methods to reduce the expected economic damages caused by voltage dips. This article presents two approaches for classifying different types of voltage dips into various clusters. Using datasets of voltage dips from the Dutch MV networks, the paper also describes the methodology for setting limits on the number of voltage dips for the regulatory purpose.

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Section: Important Aspects For Building Voltage Dip Regulationmentioning

confidence: 99%

Section: Assessing and Presenting Voltage Dipsmentioning

confidence: 99%

A proposal on voltage dip regulation for the Dutch MV distribution networks

Weldemariam

Ćuk

Cobben

2018

Int Trans Electr Energ Syst

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“…The characteristics of voltages, mainly with unbalanced dips, are often different at different voltage levels [13]. Phase-phase dips in MVnetwork propagate through Dyn transformers as phase-dips in the LV-networks, and end-users are essentially affected by phase-phase dips in the MV-networks [13,14].…”

Section: Propagation Of Voltage Dipsmentioning

confidence: 99%

Regulation and classification of voltage dips

Weldemariam

Ćuk

Cobben

et al. 2017

CIRED - Open Access Proceedings Journal

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DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal. If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:

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“…From the dataset of voltage events monitored at the point of common coupling (PCC) of a MV-network for four years, the dips that can be seen at the customer terminals are obtained [31]. Corresponding to the voltage dips sensitivity density table (given in Table 3), Table 4 shows the average density of three types of voltage dips having different magnitude and duration.…”

Section: Voltage Dip Profile and Economic Impactmentioning

confidence: 99%

Cost Estimation of Voltage Dips in Small Industries Based on Equipment Sensitivity Analysis

Weldemariam¹,

Ćuk²,

Cobben³

2016

SGRE

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Voltage dip is one of the detrimental power quality problems that can lead to huge financial losses in industries. Its economic impact is not only associated with the quality of the supply but also with sensitivity of electronic controls and equipment of the industry which are susceptible to voltage dips. Mitigating solutions are available but the choice depends on the careful assessment of the economic impact of voltage dips and economic gains of solutions. This paper presents an approach for estimating the economic cost of voltage dips based on sensitivity analysis. The voltage-tolerance curves of the sensitive equipment are obtained from experimental tests under different conditions. From the behavior and interaction of process equipment, different failure modes and economic sensitivity density are determined for different types of voltage dips. Voltage events monitored in the MV-network for several years are assessed to determine the frequency and severity of voltage dips at the customer terminal. The economic values of equipment and processes are assessed to get insight into alternative solutions with more rewarding measures. Then, cost-benefit analysis is performed to compare the economic gains of solutions protecting equipment or processes showing more rewarding economic values.

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Assessment of Voltage Dips based on Field Measurements in MV Networks

Cited by 5 publications

References 4 publications

A proposal on voltage dip regulation for the Dutch MV distribution networks

A proposal on voltage dip regulation for the Dutch MV distribution networks

Regulation and classification of voltage dips

Cost Estimation of Voltage Dips in Small Industries Based on Equipment Sensitivity Analysis

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