This article proposes the design of H∞ -based robust current controller for single-phase grid-feeding voltage source inverter with an LCL filter. The main objective of the proposed controller is to have good reference tracking, disturbance rejection and sufficient LCL resonance damping under a large range of variations of grid impedance. Based on the aforementioned performance requirements, frequency dependent weighting functions are designed. Subsequently, the sub-optimal control problem is formulated and solved to determine the stabilizing controller. Computational footprint of the controller is addressed for ease-of-implementability on low-cost controller boards. Finally controller hardware-in-the-loop simulations on OPAL-RT are performed in the validation stage to obtain performance guarantees of the controller. The proposed controller exhibits fast response during transients and superior reference tracking, disturbance rejection at steady-state when compared with proportional- and resonant-based current controllers.
|Original language||English (US)|
|Title of host publication||2020 52nd North American Power Symposium, NAPS 2020|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|State||Published - Apr 11 2021|
|Event||52nd North American Power Symposium, NAPS 2020 - Tempe, United States|
Duration: Apr 11 2021 → Apr 13 2021
|Name||2020 52nd North American Power Symposium, NAPS 2020|
|Conference||52nd North American Power Symposium, NAPS 2020|
|Period||4/11/21 → 4/13/21|
Bibliographical noteFunding Information:
ACKNOWLEDGMENT The authors acknowledge Advanced Research Projects Agency-Energy (ARPA-E) for supporting this research through the project titled “Rapidly Viable Sustained Grid” via grant no. DE-AR0001016.
© 2021 IEEE.
- current controller
- H∞-based loop shaping
- parametric uncertainty
- robust control
- voltage source inverter