Reliability Enhancement of Synchrophasor-Based DTR system considering N-1 contingency for PMU placement

The cyber power network has become more intelligent and efficient because of the integration of information and communication technology (ICT) infrastructure. By combining intelligent infrastructure such as phasor measurement units (PMUs), smart sensors, and other two-way communication and monitoring capabilities, this enhances reliability and sustainability. They do, however, have some disadvantages, such as component and communication network failures, as well as cyber breaches, which might compromise the existing network's reliability. Dynamic Thermal Rating (DTR) systems which is a smart grid technology, improves existing line ratings by allowing them to be increased based on several parameters without violating line safety requirements. Thus, this paper presents a DTR system that uses PMUs to implement Wide Area Monitoring (WAM) functions and investigates the impact of PMU failures and line outages on cyber-physical network reliability. The study uses a Monte Carlo simulation-based method to carry out the investigation on the IEEE RTS while considering the impacts of seven and thirteen PMUs. The test network is modified to emphasize the benefits of ICTs and the findings show that using PMUs enhances reliability greatly. While the use of seven PMUs offers reliability improvement by 53.15%, the use of 13 PMUs offers more significant improvement (by 95.79%) because a single line outage will not affect network observability.