Abstract
In this article, a passivity-based virtual oscillator control strategy with enhanced synchronization stability for grid-forming inverters (GFMs) is proposed. By adopting the port-controlled Hamiltonian system theory for orbital stabilization problems, an energy pumping-and-damping block is proposed to render GFMs globally asymptotically stable with respect to the prespecified solutions of the power-flow equations from any initial condition. This allows for stable integrations of GFMs to any other globally asymptotically stable systems without their explicit knowledge, e.g., helping maintain synchronism with the bulk power system in a wide range of short-circuit-ratio conditions or under large disturbances and keeping synchronism among multiple GFMs in power systems. Both simulations and experiments are presented to demonstrate the proposed control approach.
| Original language | English |
|---|---|
| Pages (from-to) | 14141-14156 |
| Number of pages | 16 |
| Journal | IEEE Transactions on Power Electronics |
| Volume | 37 |
| Issue number | 12 |
| DOIs | |
| State | Published - Dec 1 2022 |
Funding
This work was supported in part by the U.S. Department of Energy, Office of Electricity, Advanced Grid Modeling Program under Grant DE-AC05- 00OR22725, in part by the Engineering Research Program of the National Science Foundation and the DOE through National Science Foundation under Grant EEC1041877, and in part by the CURENT.
Keywords
- Grid forming inverter
- port-Hamiltonian system
- synchronization stability
- virtual oscillator control