Reduction of PMUs via hybrid PMU-RTU communication changeover in the case of cyberattack on vulnerable power transmission lines

Abstract

A power grid strictly depends on information and communication technology. The key role of real-time measurement and information control for the reliable operation of a power grid is the responsibility of the phase measurement units (PMUs). As smart power grids encounter a variety of unauthorized malicious accesses such as cyberattacks, PMU placement is an important problem. In this study, a new algorithm was proposed to specify the minimum number of PMUs in the case of cyberattacks on their communication lines and equipment. In order to analyze complete observability of the distribution system, a range of probable contingencies for the vulnerable lines of a typical power system was discussed. The proposed algorithm implementation shows that the number of required PMUs can be reduced by removing irrelevant information through cyberattack circumstance intervals by using communication equipment potential.

Improvement of the distribution network state estimation with increase of accurate information and using a two-step method

“…For example, Liu and Li showed that an attacker can attack the real-time topology using the local network information of a power grid [23]. Cyberattacks are based on the information of actual meters to sabotage electrical networks, the most important of which are PMUs [24]. Therefore, reducing transient measurement information by reducing actual measurements or optimal locating processes will make the network more robust to FDI [24].…”

“…Cyberattacks are based on the information of actual meters to sabotage electrical networks, the most important of which are PMUs [24]. Therefore, reducing transient measurement information by reducing actual measurements or optimal locating processes will make the network more robust to FDI [24]. Isozaki et al showed how data integrity attacks in the DN can certainly affect the power quality at the consumer's side, damage power devices in DNs, and cause economic impacts on the revenue of DG owners [25].…”

“…Parvania et al showed that cyberattacks in the DN can disrupt the performance of different processes in future automated distribution systems such as fault location, isolation, and service restoration, leading to reliability problems [26]. Moreover, an attacker can manipulate measurements in such a way that will lead to opening several circuit breakers to cause customers to lose power [24]. Therefore, considering the research outlined above, an appropriate method is needed to limit the use of pseudo-measurements in DSSE.…”