Theses and Dissertations Collection

The study of HVDC systems and cyber-attacks on their control systems can play an important role

in the security and stability of large interconnected power systems. This work develops and analyzes a

layer of security useful to detect and mitigate the negative impact of cyber-attacks directed towards high

voltage direct current (HVDC) systems. It also identifies and categorizes potential attack types which

may be harmful to power system operation if left unmitigated. Minimization of transients induced by

remediation action are also addressed through the use of a classic control system technique: the bumpless

transfer. Contained in this thesis is a summary of the testing performed on a HVDC cyber physical

simulation environment, the performance of the security algorithms in terms of timing, detection rate,

and relationship with false detection. Successful implementation of the approaches developed in this

thesis can help allow the HVDC system to enhance resilience of the interconnected power system in the

face of cyber-attacks.