Abstract

This study aims to quantify and compare the reliability of two alternative power system architectures: a conventional configuration based on traditional elements and a future envisioned architecture, where multi-port power converters operate as network nodes. The objective is to evaluate how these two approaches perform relative to each other in terms of reliability, and to determine whether the emerging converter-based structure represents an improvement or a drawback compared with the conventional design. To simplify the analysis and the comparison results, the analysis is presented for a double-fed power system. Both systems were modeled using two-state components characterized by constant failure and re- pair rates. Reliability assessment was carried out using a continuous-time Markov chain (CTMC) approach to derive the key adequacy indices. To validate the analytical results, a non-sequential Monte Carlo Simulation (MCS) was also performed, allowing a direct comparison between stochastic sampling and analytical modeling. The results show that the transformer-based configuration achieves a reliability of 0.9972 compared with 0.9960 for the power-router-based configuration, while also exhibiting lower LOLE and EENS, indicating a modest reliability advantage for the conventional architecture under the adopted assumptions.

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