Cyber-Physical Vulnerability and Security Analysis of Power Grid with HVDC Line

Abstract

The High Voltage Direct Current (HVDC) technology is typically used for power transfer over longer distances or asynchronous back-to-back connections of the ac networks, or connecting cluster of high power renewable energies to the grid. The performance of the power system can be impacted by the HVDC control and operations. Functionality of the HVDC controllers depend on the information and communication technologies and are vulnerable to cyber-attacks. Hence, the cyber-physical security analysis of the HVDC system needs to be investigated. This study is a step towards cyber-physical analysis for grid with HVDC system by analyzing: 1) the cyber system vulnerabilities of the HVDC system, 2) the integrated cyber-physical system model developement with HVDC technology, 3) the effect of cyber-attacks on the HVDC and impact on the dynamic voltage stability of the power system, and 4) the cyber-attack detection and mitigation. Also, different cyber-attack scenarios on the HVDC system are developed for analyzing the developed approach. The proposed analysis are validated by simulation of the several case studies on the integrated cyber-physical model of the IEEE 9-bus system with the HVDC technology.