Use of voltage limits for current limitation in grid-forming converters
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|Title:||Use of voltage limits for current limitation in grid-forming converters||Authors:||Chen, Junru; Prystupczuk, Federico; O'Donnell, Terence||Permanent link:||http://hdl.handle.net/10197/12445||Date:||13-Feb-2020||Online since:||2021-08-20T17:24:21Z||Abstract:||Renewable generation interfaced through grid-forming converters are proposed as a replacement for synchronous generators in power systems. However, compared to the synchronous generator, the power electronics converter has a strict limit on the current to avoid overcurrent damage. The grid-forming converter acts like a voltage source, directily controlling the voltage. This conflicts with the operation of the conventional current limit control, which is applied to a current source. The switch between the voltage control and current control aimed to impose the current limit leads to synchronization instability. This paper proposes a novel control scheme which can be applied to the grid forming voltage control in order to enforce current limits. The proposed method has been verified through simulation and hardware tests in both symmetrical and asymmetrical faults to perform current suppression while maintaining synchronization stability in the voltage control mode.||Funding Details:||Science Foundation Ireland||Funding Details:||ESIPP UCD||Type of material:||Journal Article||Publisher:||Power System Technology Press||Journal:||CSEE Journal of Power and Energy Systems||Volume:||6||Issue:||2||Start page:||259||End page:||269||Copyright (published version):||2019 CSEE||Keywords:||Angle-power curve; Current limit; Grid-forming converter; Voltage limit||DOI:||10.17775/cseejpes.2019.02660||Other versions:||https://ieeexplore.ieee.org/document/8993699||Language:||en||Status of Item:||Peer reviewed||ISSN:||2096-0042||This item is made available under a Creative Commons License:||https://creativecommons.org/licenses/by-nc-nd/3.0/ie/|
|Appears in Collections:||Electrical and Electronic Engineering Research Collection|
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