Controladores eletrônicos PWM integrados para compensadores harmônicos estáticos.

Abstract

This doctoral dissertation presents a set of contributions considering the development of pulse width modulated electronic controllers for static power compensators, applied in the mitigation of harmonic components of voltage and current. Among the novelties of the presented techniques, the following charact.eristics are highlighted: greater integration made possible with the reduction of the number of sensors, and robust design, considering the modeling and tuning, optimizing the tolerance for uncertainties and noise immunity in the feedback schemes. The presented solutions contribute for the reduction of manufacturing costs, since the set of electronic components for the equipment composition is reduced. In the presented context, this thesis is divided in three parts, grouping a set of distinct contributions in each case, which is explored with different circuit topologies. In the first and second parts two main solutions for sensorless controllers are presented, the first based in the signals orientations, and the second in the modulation. Whereas the first and second part focuses on the digital realization of the controllers, the third part presents an analog-mixed integrated circuit solution, with potential applications in high-density systems. In addition, the third part discusses a solution considering power management circuits with two-stage conversion. In order to demonstrate the technical feasibility of the presented contributions, numerical simulations and experimental results obtained through laboratory prototypes are presented. Analysis of the steady-state regime and transients are discussed, showing that a satisfactory performance is obtained through the proposed techniques.