| Title: | Power-based concept for current injection by inverter-interfaced distributed generations during transmission-network faults |
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| Authors: | ID Polajžer, Boštjan (Author)
ID Grčar, Bojan (Author)
ID Černelič, Jernej (Author)
ID Ritonja, Jožef (Author) |
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| Files: |  applsci-11-10437.pdf (1,39 MB)
MD5: 7CB6AF044B97C0BDB787592C57892325
 https://www.mdpi.com/2076-3417/11/21/10437
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FERI - Faculty of Electrical Engineering and Computer Science
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| Abstract: | This paper analyzes the influence of inverter-interfaced distributed generations’ (IIDGs)
response during transmission network faults. The simplest and safest solution is to switch IIDGs
off during network faults without impacting the network voltages. A more elaborate and efficient
concept, required by national grid codes, is based on controlling the IIDGs’ currents, involving
positive- and negative-sequence voltage measured at the connection point. In this way the magnitude
and phase of the injected currents can be adjusted, although the generated power will depend on the
actual line voltages at the connection point. Therefore, an improved concept is proposed to adjust
IIDGs’ fault current injection through the required active and reactive power, employing the same
voltage characteristics. The proposed, i.e., power-based concept, is more definite than the currentbased one, since the required power will always be generated. The discussed concepts for the fault
current injection by IIDGs were tested in different 110-kV networks with loop and radial topologies,
and for different short-circuit capabilities of the aggregated network supply. Based on extensive
numerical calculations, the power-based concept during transmission networks faults generates
more reactive power compared to the current-based concept. However, the voltage support by IIDGs
during transmission networks faults, regardless of the concept being used, is influenced mainly
by the short-circuit capability of the aggregated network supply. As regards distance protection
operation, it is influenced additionally by the network topology, i.e., in radial network topology, the
remote relay’s operation can be delayed due to a largely seen impedance. |
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| Keywords: | distributed generation, fault current injection, voltage support, distance protection, transmission network faults |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 02.10.2021 |
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| Article acceptance date: | 04.11.2021 |
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| Publication date: | 06.11.2021 |
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| Publisher: | MDPI |
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| Year of publishing: | 2021 |
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| Number of pages: | str. 1-15 |
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| Numbering: | Vol. 11, iss. 21 |
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| PID: | 20.500.12556/DKUM-93261  |
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| UDC: | 621.31 |
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| ISSN on article: | 2076-3417 |
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| COBISS.SI-ID: | 84163331 |
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| DOI: | 10.3390/app112110437 |
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| Copyright: | © 2021 by the authors |
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| Publication date in DKUM: | 16.06.2025 |
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| Views: | 168 |
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| Downloads: | 12 |
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| Metadata: |    |
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| Categories: | Misc.
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