Sökning: WFRF:(Norrga Staffan 1968 ) >
Effects of Control ...
Effects of Control on the AC-Side Admittance of a Modular Multilevel Converter
-
- Bessegato, Luca (författare)
- KTH,Elkraftteknik,Power Electronics
-
Ilves, Kalle (författare)
-
Harnefors, Lennart, 1968- (författare)
-
visa fler...
-
- Norrga, Staffan, 1968- (författare)
- KTH,Elkraftteknik
-
visa färre...
-
(creator_code:org_t)
- IEEE Press, 2019
- 2019
- Engelska.
-
Ingår i: IEEE transactions on power electronics. - : IEEE Press. - 0885-8993 .- 1941-0107. ; 34:8, s. 7206-7220
- Relaterad länk:
-
https://ieeexplore.i...
-
visa fler...
-
https://kth.diva-por... (primary) (Raw object)
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- The stability of a modular multilevel converter connected to an ac grid can be assessed by analyzing the converter ac-side admittance in relation to the grid impedance. The converter control parameters have a strong impact on the admittance and they can be adjusted for achieving system stability. This paper focuses on the admittance-shaping effect produced by different current-control schemes, either designed on a per-phase basis or in the $dq$ frame using space vectors. A linear analytical model of the converter ac-side admittance is developed, including the different current-control schemes and the phase-locked loop. Different solutions for computing the insertion indices are also analyzed, showing that for a closed-loop scheme a compact expression of the admittance is obtained. The impact of the control parameters on the admittance is discussed and verified experimentally, giving guidelines for designing the system in terms of stability. Moreover, recommendations on whether a simplified admittance expression could be used instead of the detailed model are given. The findings from the admittance-shaping analysis are used to recreate a grid-converter system whose stability is determined by the control parameters. The developed admittance model is then used in this experimental case study, showing that the stability of the interconnected system can be assessed using the Nyquist stability criterion.
Ämnesord
- 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)
Nyckelord
- Modular multilevel converters
- admittance
- current control
- stability
- frequency-domain analysis
- linearization techniques.
- Electrical Engineering
- Elektro- och systemteknik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas