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Enhanced Q-Axis Voltage-Integral Damping Control for Fast PLL-Synchronized Inverters in Weak Grids
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- Chen, Feifan (author)
- KTH,Skolan för elektroteknik och datavetenskap (EECS)
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- Zhao, Liang (author)
- Aalborg Univ, Dept Energy Technol, DK-9220 Aalborg, Denmark.
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- Harnefors, Lennart (author)
- ABB Corp Res, S-72226 Västerås, Sweden.
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- Institute of Electrical and Electronics Engineers (IEEE), 2024
- 2024
- English.
- In: IEEE transactions on power electronics. - : Institute of Electrical and Electronics Engineers (IEEE). - 0885-8993 .- 1941-0107. ; 39:1, s. 424-435
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- The phase-locked loop (PLL) is a commonly used synchronization control method for grid-tied inverters. The PLL-synchronized inverters tend to have poor stability robustness with weak grid interconnections, especially when the PLL is designed with a high control bandwidth. To tackle this challenge, this article proposes an enhanced q-axis voltage-integral damping control, which not only stabilizes PLL-synchronized inverters in weak grids but also lifts the restriction on PLL bandwidth. This superior feature enables inverters to operate stably in ultraweak grids and with a superior transient response. The experimental tests confirm the performance of the method with 400-Hz PLL bandwidth under a short-circuit ratio of 1.28 of the grids.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Keyword
- Active damping
- phase-locked loop (PLL)
- transient response
- weak grids
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Kukkola, Jarno
- Routimo, Mikko
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