Proportional-Resonant Controller Applied to DSTATCOM in a Hybrid Hydro-PV Generation System

Abstract

In distribution power generation, hybrid systems play an important role, mainly due its flexibility and reliability. This paper deals with the development of a control strategy for hybrid hydro-PV generation system employing a three-phase three-legs Split-Source Inverter (SSI) like a distribution synchronous static compensator (DSTATCOM). The SSI has the ability to feed ac loads with a boost characteristic. In addition, the proposed control strategy ensures regulation for balanced output ac voltages and load disturbance compensation of self excited induction generator (SEIG) based systems, providing the required active and reactive power. The modeling of the system and the design of the resonant controller are presented in detail. In addition, simulation results are presented to demonstrate the performance of the proposed control strategy.

Model Predictive Control for Voltage Regulation of Standalone Self-Excited Induction Generator

“…For the dc-link voltage control, a transfer function is obtained that relates the dc link voltage v dc with the direct axis current i d (Cocco et al, 2020). Thereby, the power flow analysis is performed applying the Tellegen theorem to obtain the dynamic model.…”

“…On the other hand, Proportional Resonant Controllers (PRs) are attractive because they are based on the principle of the internal model. These provide ideally infinite gain at chosen frequencies, ensuring tracking of sinusoidal references, rejecting disturbances and reducing harmonics at specific frequencies (Cocco et al, 2020). However, in cases of critical load conditions for a microgeneration system, it is necessary to use PRs at various frequencies of interest, so that they reject high and low order harmonics and, therefore, causing the reduction of the passband, decreasing the fast dynamic response and even causing instability in the control of the system.…”