Controle adaptativo de D-SSSC por MRAC

Abstract

In recent years, numerous environmental, technical, and economic factors have enabled the increased penetration of distributed generation (DG) based on renewable sources in distribution systems. Along with the benefits brought by this new approach to the power system, it has become more challenging to maintain power quality standards within acceptable limits for delivery to consumers. To address these new challenges, power electronicsbased devices, known as RACDS, have shown great potential for mitigating these issues in an intelligent, flexible, and dynamic manner. Within this context, this work aims to analyze the operational performance of a series-type RACDS device, known as a Distribution Static Synchronous Series Compensator (D-SSSC). This equipment is intended to interconnect distribution feeders to balance the load between them, thus providing better voltage regulation, loss reduction, and postponing infrastructure investments to meet higher energy demands in these systems. The analysis of the D-SSSC’s operational points allowed for the establishment of essential requirements for the controller to be used. Due to the high number of uncertainties and events that distribution systems are subject to, such as load variations, the connection and disconnection of distributed generation, and network maneuvers, the controller must be robust and agile to prevent critical transient deviations. In this context, the work proposes the use of a Model Reference Adaptive Control (MRAC). This controller stands out for its adaptive profile, adjusting parameters in real-time to cope with the fast dynamics and uncertainties of the distribution system. Based on the analysis of test results conducted both in a simulated environment and in a medium-voltage laboratory setting, MRAC has shown promise for controlling the D-SSSC.