Open AccessRobust protection scheme against cyber‐physical attacks in power systems
Author(s) -
Di Giorgio Alessandro,
Pietrabissa Antonio,
Delli Priscoli Francesco,
Isidori Alberto
Publication year - 2018
Publication title -
iet control theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.059
H-Index - 108
eISSN - 1751-8652
pISSN - 1751-8644
DOI - 10.1049/iet-cta.2017.0725
Subject(s) - decoupling (probability) , cyber physical system , electric power system , control theory (sociology) , robustness (evolution) , computer science , context (archaeology) , scheme (mathematics) , control engineering , power transmission , computer security , engineering , power (physics) , control (management) , mathematics , paleontology , mathematical analysis , biochemistry , physics , chemistry , quantum mechanics , biology , gene , artificial intelligence , operating system
This study presents a robust defence strategy in reaction to destabilising cyber‐physical attacks launched against linear time invariant systems and its application to power systems. The proposed protection scheme aims at making the dynamics of a selected subsystem decoupled from the dynamics of the subsystem targeted by the attack. The standard decoupling methods are made robust, in spite of poor information about plant parameters and lack of state measurement, with the aid of an extended observer. In this way, it is possible to keep the protected dynamics arbitrarily close to the one of a suitably chosen stable system, so long as the dynamics being targeted by the attack remain within the prescribed bounds. The proposed defence strategy is presented in the context of modern power systems, wherein generators and transmission networks are operated by different players and shown to be effective using the Western System Coordinating Council 9‐bus test power network.