Sliding Mode Control of Three-Phase Four-Leg Inverters via State Feedback

Abstract

To optimize controller design and improve static and dynamic performances of three-phase four-leg inverter systems, a compound control method that combines state feedback and quasi-sliding mode variable structure control is proposed. The linear coordinate change matrix and the state variable feedback equations are derived based on the mathematical model of three-phase four-leg inverters. Based on system relative degrees, sliding surfaces and quasi-sliding mode controllers are designed for converted linear systems. This control method exhibits the advantages of both state feedback and sliding mode control. The proposed controllers provide flexible dynamic control response and excellent stable control performance with chattering suppression. The feasibility of the proposed strategy is verified by conducting simulations and experiments.

Control Design of LCL Type Grid-Connected Inverter Based on State Feedback Linearization

“…In addition, the drive flux and torque ripple were suppressed. Yang et al combined feedback linearization and sliding mode variable structure control to complete the control of three-phase four-leg inverter [13]. This method was used to decouple the torque and stator flux of the inductive motor by Lascu et al [14].…”

Grid Forming Inverters: A Review of the State of the Art of Key Elements for Microgrid Operation

“…In [18,63] is presented a classification of voltage and current controllers applied to the inner loop and it is illustrated in Table 2. [103] Proportional Resonant (PR) Controller [103] Dead-beat Controller (DB) [104] DB Controller [105] Predictive Controller [106] Sliding-mode Controller (SMC) [107] Hysteresis Controller [108] dq Proportional Integral (PI) Controller [109] PI Controller [110] Linear Quadratic Regulator (LQR) Controller [111] αβ PR Controller [112] PR Controller [113]…”