Abstract
The interaction of a grid-connected voltage-source converter with a weak grid is of significant interest. In this paper, the converter together with the grid impedance is modeled as a single-input single-output (SISO) system. Provided that certain assumptions hold, this allows us to apply the standard SISO Nyquist stability criterion for stability analysis and controller design. The derived model is verified against time-domain simulations and experiments. The method facilitates the design of the converter control system with adequate stability margins.
Original language | English |
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Article number | 8516363 |
Journal | IEEE Transactions on Power Electronics |
Volume | 34 |
Issue number | 8 |
Pages (from-to) | 8104-8117 |
Number of pages | 14 |
ISSN | 0885-8993 |
DOIs | |
Publication status | Published - Aug 2019 |
Keywords
- MIMO communication
- multi-input multi-output (MIMO)
- Numerical stability
- Nyquist stability criterion
- Phase locked loops
- Power system stability
- single-input single-output (SISO)
- Stability criteria
- Transfer functions
- voltage-source converter (VSC)
- weak grid
- Multi-input multi-output (MIMO)