Cyber-Security Problems in Smart Grid Cyber Attacks Detecting Methods and Modelling Attack Scenarios on Electric Power Systems

The intellectualization of an electrical power system (EPS) creates a required infrastructure for the efficient transmission, distribution and consumption of electrical energy, and is based on the integration of the EPS with information networks. Significant disadvantages of such integration are related to the problems of cyber security which have become particularly important in recent times. Currently, the applied methods of cyber security are taken from information technology and in no way are connected with the specifics of electrical power systems. The purpose of this article is to develop an algorithm to detect cyber-attacks based on continuous monitoring of the EPS parameters. The method is based on the algorithm of additional authentication of the SV-messages of the IEC 61850 Protocol sent between microprocessor devices of relay protection and automation (MDRPA). This authentication is based on the results of beforehand simulation of many regimes of the analyzed electrical network. Additionally, the authors presented the analysis of the scenarios and damage from cyber-attacks which includes the sequential outages of power generation facilities. The cyber-attack scenario is the result of an iterative calculation of the steady state modes of the electrical network depending on the indices of the elements.