This paper intends to comparatively study the stabilities of grid-connected inverters with three closely related controllers: quasi-proportional resonance (quasi-PR), proportional integral (PI), and (PR) under weak grid. Firstly, considering influence frequency coupling characteristic, a admittance model quasi-PR controlled inverter is established. Then, characteristics quasi-PR, PI PR are comp...

-This paper is describing the recently introduced proportional-resonant (PR) controllers and their suitability for grid-connected converters current control. It is shown that the known shortcomings associated with PI controllers like steady-state error for single-phase converters and the need of decoupling for three-phase converters can be alleviated. Additionally, selective harmonic compensati...

It is shown that proportional-integral (PI) control in the synchronously rotating (d, q)-reference frame and proportional-resonant (PR) control in the stationary (α, β)-reference frame, both with anti-windup, are equivalent if and only if their implementation is done correctly in state space and the controller parameters and the initial values are identical. It is shown that an equivalence in t...

The multiphase induction motor (MIM) suffers the problems of unsmoothness and slow dynamic response during process electronic pole-changing. To solve this issue, a cosine-response strategy based on proportional resonance (PR) current controller is proposed. Firstly, switching with designed, which makes MIM work more smoothly while between two planes. Then, PR static coordinate system adopted to...

Field-oriented control (FOC) has achieved great success in permanent magnet synchronous motor (PMSM) control. For the PMSM drive, FOC allows torque and flux to be controlled separately, which means are decoupled from each other. Since is by speed controller, it can considered that of also other separately. In this paper, we propose a vector using controllers based on proportional-resonant (PR) ...

Dans ce rapport, nous nous int eressons a l'ensemble des techniques qui ont et e propos ees dans le cadre de l'identiication et de la commande connexionniste. Apr es une pr esentation du domaine, nous insistons plus particuli erement sur les points suivants. Dans un premier temps, nous poserons les probl emes relatifs a l'application des r eseaux connexionnistes a l'identiication et la commande...

This paper proposes a second-order harmonic reduction technique using a proportional-resonant (PR) controller for a photovoltaic (PV) power conditioning system (PCS). In a grid-connected single-phase system, inverters create a second-order harmonic at twice the fundamental frequency. A ripple component unsettles the operating points of the PV array and deteriorates the operation of the maximum ...

(Abstract) This dissertation aims to present a detailed analysis of the grid voltage disturbance in frequency domain for the current control design in the grid-tie inverter applications and to propose current control techniques in order to minimize its impact and maximize feasibility of the power conditioning system in distributed generations. Because the grid voltage is constantly changing, th...

This paper is concerned with coherent quantum linear quadratic Gaussian (CQLQG) control. The problem is to find a stabilizing measurement-free quantum controller for a quantum plant so as to minimize a mean square cost for the fully quantum closed-loop system. The plant and controller are open quantum systems interconnected through bosonic quantum fields. In comparison with the observation-actu...