Abstract
Grid-connected inverters inevitably operate under uncertain system parameters. These uncertain parameters such as inductance and capacitance are caused by device aging or uncertain grid conditions. And they will affect the stability margin of the inverter and bring an unstable operation risk even with a well initial design. The existing research articles mainly focus on robust stability analysis and control strategies while ignoring the influence of parameter distributions on operational risk. How to evaluate the instability risk of the inverter under multiparameter distribution is still an open question. In this article, the structured singular value (SSV) method is proposed to evaluate the robust stability of the inverter with multiparameter distributions. The distribution characteristics of uncertain parameters are briefly reviewed. The system model of a single-phase grid-connected inverter is established with the parameter distributions of the system key components. The probability of stable system operation can be quantified by the SSV method. Experiment and case study results verify the correctness and effectiveness of the proposed method.
| Original language | English |
|---|---|
| Journal | IEEE Transactions on Power Electronics |
| Volume | 37 |
| Issue number | 5 |
| Pages (from-to) | 6062-6073 |
| Number of pages | 12 |
| ISSN | 0885-8993 |
| DOIs | |
| Publication status | Published - 1 May 2022 |
Bibliographical note
Publisher Copyright:© 1986-2012 IEEE.
Keywords
- Robust stability margin
- single-phase grid-connected inverter
- structured singular value (SSV)