Transient stability analysis and enhancement of grid-forming inverters under different current prioritization limitation techniques
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|Title:||Transient stability analysis and enhancement of grid-forming inverters under different current prioritization limitation techniques||Authors:||Zhao, Xianxian; Flynn, Damian||Permanent link:||http://hdl.handle.net/10197/13084||Date:||12-Nov-2020||Online since:||2022-08-22T10:51:27Z||Abstract:||Grid-forming voltage source converters have been envisioned to play a major role in future power systems, but they have limited overcurrent capability. Therefore, it is important to investigate their ability to ride through faults and maintain system stability under strict overcurrent limits. Different current priority limiting controls based on conditional anti-windup integration are formulated, and transient stability is analyzed using voltage phasor diagrams. Subsequently, a practical solution is proposed which enhances transient stability, by freezing the virtual angular speed to the pre-fault value during faults, once current saturation occurs. Additionally, temporarily freezing the post-fault angular speed to a value slightly less than pre-fault value ensures recovery from the saturated current state. Simulation results, based on a modified IEEE 39-bus system validate the efficacy of the proposed solution.||Funding Details:||Science Foundation Ireland||Type of material:||Conference Publication||Keywords:||Grid-forming converter; Current limiting; Transient stability; Anti-windup integration; Fault analysis||Other versions:||https://compel2020.org||Language:||en||Status of Item:||Peer reviewed||Conference Details:||The Twenty-first IEEE Workshop on Control and Modeling for Power ElectronicsAalborg (IEEE COMPEL 2020), Aalborg, Denmark, 9-12 November 2020||ISSN:||1093-5142||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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