Abstract
The increased presence of power converters in power networks has set new power system stability chal-lenges. New methodologies have been proposed to analyse these systems and one of the most promisingis the impedance-based stability criterion. To date using this method the grid interfaced converter is repre-sented in terms of impedances and it is assumed that the converter impedances within the sequence-frameare decoupled. However, coupling between the components of the sequence-frame converter impedanceshave been observed, and different studies have shown how relevant this might become to the stability per-formance. Hence, a stability margin that takes such coupling into account is presented in this paper. Thisresults in a more conservative measure of the stability robustness of the system, compared to the gainand phase margin figures employed in the impedance-based stability criterion. The presented study hasbeen used to assess how the relative stability of a VSC system connected to a weak grid varies with itsoperating point, and experimental data have been used to support the analytical study.
Original language | English |
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Number of pages | 10 |
Publication status | Published - 2 Sept 2019 |
Event | 21st European Conference on Power Electronics and Applications (EPE2019) - Genona, Italy Duration: 2 Sept 2019 → 6 Sept 2019 |
Conference
Conference | 21st European Conference on Power Electronics and Applications (EPE2019) |
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Country/Territory | Italy |
City | Genona |
Period | 2/09/19 → 6/09/19 |
Keywords
- converter circuit
- converter control
- voltage source converter
- power transmission
- renewabe energy systems