Optimized Hierarchical Control for an AC Microgrid Under Attack

• Main Authors: Vladimir Toro, Eder David Baron, Eduardo Mojica-Nava
• Format: Article
• Language: Spanish
• Published: Universidad Distrital Francisco José de Caldas 2019-01-01
• Series: Ingeniería
• Online Access: https://revistas.udistrital.edu.co/ojs/index.php/reving/article/view/13760

Context: An inverter-based microgrid working in islanded mode can suffer cyber- attacks, these can be done against either the local controller or the communication links among the inverters. Secondary control is able to reject those attacks, however, a tertiary control action is necessary in order to stabilize the power flow among the microgrid. Method: Confidence factor technique allows to reject attacks in a microgrid acting directly over the secondary control, however, this technique omits other factor related to the power available. In this case, secondary control was complemented with a tertiary control that includes optimization criteria. Results: An inverter-based microgrid is simulated in Matlab for different scenarios and under cyberattack, this allows checking the correct response of the controller under attacks and the effective powersharing among inverters. Conclusions: The tertiary control allows stabilizing the active power of the system after the rejection of a cyber-attack by the secondary control. Each inverter supplies active power according to its máximum power rating without affecting the stability of the whole system.