Abstract
To analyze oscillation phenomenon caused by the interaction between converters and an AC grid, the impedance/admittance analysis method is a popular solution, in which each electrical component is represented by an external impedance/admittance matrix and a lumped matrix is formed for stability analysis. However, for converter-integrated power systems considering typical collector subsystems (e.g., the radial and ring collector subsystem in wind farms and PV stations), the impedance network reduction to form the lumped impedance/admittance matrix (LIM/LAM) becomes complicated particularly for a ring collector subsystem, which affects the efficiency of the oscillation analysis. To address this problem, this paper proposes a method that can transform a typical topology of collector subsystems into a pure-parallel topology so that lumped admittance matrix is much easier to be derived. Algorithm complexity analysis confirms its computational advantages. A fifty-converter system is used to verify the effectiveness of the proposed method.
Original language | English |
---|---|
Journal | IEEE Transactions on Power Systems |
Volume | 36 |
Issue number | 6 |
Pages (from-to) | 5963-5966 |
ISSN | 0885-8950 |
DOIs | |
Publication status | Published - 2021 |
Keywords
- Admittance
- Collector subsystem transformation
- Converter-integrated power system
- Impedance
- lumped impedance/admittance matrix (LIM/LAM)
- Matrix converters
- Network topology
- Oscillation analysis
- Oscillators
- Power system stability
- Topology