Resumo:
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.
