Impact of System Strength and Control Parameters on the Small-Signal Stability of Grid Following and Grid Forming Inverters
Paper
Cui, Hankun, Bai, Feifei and Cui, Yi. 2023. "Impact of System Strength and Control Parameters on the Small-Signal Stability of Grid Following and Grid Forming Inverters." 33rd Australasian Universities Power Engineering Conference (AUPEC 2023). Ballarat, Australia 25 - 27 Sep 2023 Australia. https://doi.org/10.1109/AUPEC59354.2023.10503240
Paper/Presentation Title | Impact of System Strength and Control Parameters on the Small-Signal Stability of Grid Following and Grid Forming Inverters |
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Presentation Type | Paper |
Authors | Cui, Hankun, Bai, Feifei and Cui, Yi |
Journal or Proceedings Title | Proceedings of the 33rd Australasian Universities Power Engineering Conference (AUPEC 2023) |
Number of Pages | 7 |
Year | 2023 |
Place of Publication | Australia |
Digital Object Identifier (DOI) | https://doi.org/10.1109/AUPEC59354.2023.10503240 |
Web Address (URL) of Paper | https://ieeexplore.ieee.org/document/10503240 |
Web Address (URL) of Conference Proceedings | https://ieeexplore.ieee.org/xpl/conhome/10502395/proceeding |
Conference/Event | 33rd Australasian Universities Power Engineering Conference (AUPEC 2023) |
Event Details | 33rd Australasian Universities Power Engineering Conference (AUPEC 2023) Parent Australasian Universities Power Engineering Conference Delivery In person Event Date 25 to end of 27 Sep 2023 Event Location Ballarat, Australia |
Abstract | Inverter-driven small signal stability issue has been identified as a new stability class by global power industries, which are the bottleneck for high solar/wind power penetration. This new stability problem is mainly caused by the interactions between controllers of the converters and other power system elements. To eliminate the oscillation problems, it is crucial to develop fundamental theories to fully understand the IBR dynamic behaviours and identify the cause of oscillations. In this paper, the small-signal mathematic models are established for grid-following invertor (GFLI) and grid-forming invertor (GFMI), based on which the small signal analysis is performed on both GFLI and GFMI to study the impacts of system strength and control parameters on their small-signal stability. Small-signal analysis reveals that low system strength can lead to instability in GFLI, but the instability of GFMI happens when it connects to a grid with high system strength. It is also found that those instability issues can be resolved by tuning their control parameters. However, parameter tuning brings side effects to those systems. Therefore, a modified inner current controller is novelly developed for GFMI to maintain its stability without bringing other negative effects. The developed controller and theoretical analysis are verified in the EMT testbed built in PSCAD. |
Keywords | Control Parameter; Grid Following Inverter; Grid Forming Inverter; System Strength; Small Signal Analysis |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 400803. Electrical energy generation (incl. renewables, excl. photovoltaics) |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Queensland |
Griffith University | |
School of Engineering |
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https://research.usq.edu.au/item/zq419/impact-of-system-strength-and-control-parameters-on-the-small-signal-stability-of-grid-following-and-grid-forming-inverters
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