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Evaluation of Smart Grid Control Scenarios in a Communication Security Platform

pubblicazioni - Memoria

Evaluation of Smart Grid Control Scenarios in a Communication Security Platform

Il paper presenta attraverso l’analisi di alcuni scenari l’impatto sulla stabilità del sistema power di alcuni tipi di cyber attack alle comunicazioni necessarie per la funzionalità di controllo di tensione in reti MV con la presenza di generazioen distribuita. Attraverso la piattaforma sviluppata all’interno del laboratorio PCSResTest verranno evidenziati le interazioni tra componenti ICT e power e come il malfunzioanmento dei primi impatti sullo stato dei secondi.

The evolution of the power system towards the Smart Grid paradigm requires to reshape the control functionalities including orimproving the Information Communication Technology (ICT) functions and addressing the consequent cyber security issues.The aimof the paper is the analysis of control scenarios involving Distributed Energy Resources (DER)connected to the medium voltage gridwith focus on the communications needed by avoltage control function at the HV/MV substation in order to maintain the voltage values within the technical limitsalong all the distribution network nodes. In order to study some relevant voltage control scenarios a communication and cyber security platform has beenset-up in the RSE PCS-ResTest laboratory.

The paper describes the main control and communication components implemented in the lab andhow these interactat ICT and grid control level. An advanced ICT monitoring infrastructure integrated into the laboratory platform allows observingseveral performance indicators at network and application level, and to highlight the attack effects on the control communications.

A conceptual model of (a subsetof)the system security states and transitions has been presented in this paperand used as a guideline through the scenario description. The paper analyses how, in response tocyber attackeffects, either the security feature configuration is modified to recover the performance of critical communications, or the control actions are adapted in order to include the power resources actually reachable through the communication infrastructure. A (sub) optimal control strategy for maintaining the stability of the power grid is then addressed. Moreover, the paper demonstrates the importance of the synergic cooperation between the ICT monitoring infrastructure and the control network aimed at guaranteeing the power grid stability in an environment connecting DER also in presence of malicious failure scenarios.

The results presented in this paper have the ambition to guide the evolution of the smart grids fostering the deployment of suitable cyber security and monitoring technologies.

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