Controle ressonante aplicado a um DSTATCOM para a regulação de tensão de geradores de indução autoexcitados

Abstract

This master’s thesis presents contributions to the control applied to the voltage regulation of autonomous microgeneration systems based on Self-Excited Induction Generators (SEIGs). The generation system consists of a three-phase four-wire bus consisting of a Static Synchronous Distribution Compensator (DSTATCOM), excitation capacitor banks for induction generator connected in parallel with the three-phase bus. DSTATCOM provides the compensation of reactive power to the system through a control strategy in order to provide the difference between the reactive power provided by the excitation capacitors and the reactive power required by the generator itself and the aggregate loads, in addition to compensating for harmonic components from nonlinear loads and compensating for imbalances caused by load connections in distinctive configurations. The mathematical modeling processes of the system and design of the voltage controllers are demonstrated. For this, the control strategy consists of six loops, three internal current loops, using a set of derivative resonant proportional controllers and three external loops, containing integral proportional controllers and associated resonant controllers. Simulation and experimental results are presented to demonstrate the dynamic performance of current and voltage controllers. It has also demonstrate the viability of the control system proposed to DSTATCOM, being possible to regulate the voltage and reduce the harmonic content of the currents and voltages of the SEIG in order to meet the values recommended by IEEE 519-2014 standards.