Energies, Vol. 18, Pages 4739: Event-Triggered Control of Grid-Connected Inverters Based on LPV Model Approach

Energies, Vol. 18, Pages 4739: Event-Triggered Control of Grid-Connected Inverters Based on LPV Model Approach

Energies doi: 10.3390/en18174739

Authors:
Wensheng Luo
Zhiwei Zhang
Zejian Shu
Haibin Li
Jianwen Zhang

This study aims to develop an event-triggered control strategy of grid-connected inverters, based on the linear parameter-varying (LPV) modeling approach. Regarding the changes in grid voltage, filter capacitance and inductance, and random electromagnetic interference, a stochastic LPV model for three-phase two-level inverters is established. To reduce computation burden, an event trigger with a continuous-time form is adopted to derive the state feedback controller for the LPV plant. Unlike the existing common approach to dealing with event-triggered mechanisms, a predesignated event-triggering threshold is used to determine the triggering instant of the event condition. Using parameter-dependent Lyapunov functions, sufficient conditions reliant on parameters are introduced. Based on the derived conditions, the corresponding event-triggered controllers are engineered to ensure uniform ultimate bounded stability for the resulting event-triggered LPV inverter system subject to exogenous disturbance. The simulation results are presented to confirm the efficacy of the proposed methods.