Inspec keywords: harmonic distortion; power harmonic filters; resonant power convertors; time-varying systems; LC circuits; optimal control; robust control; PWM power convertors; power system control; control system synthesis; electric current control; linear systems; discrete systems; linear quadratic control

Other keywords: state feedback controller; robust discrete linear quadratic control; point of common coupling; optimal linear quadratic regulator; grid-connected three-phase pulse-width modulated converter; LCL filter; total harmonic distortion; three-phase inverter; grid injected current; grid inductance; closed-loop system; resonant controller; IEEE 1547 standard; robust optimal current control; time-varying parameter

Subjects: Power supply quality and harmonics; Time-varying control systems; Optimal control; Stability in control theory; Power convertors and power supplies to apparatus; Control of electric power systems; Current control; Power system control; Discrete control systems