Reliable and secure power delivery is essential for the electric power system modernization with low to zero carbon footprint. It requires deploying new technologies and infrastructure as well as deregulating the electricity sector. Some stablished technologies have a considerable role in power system modernization including renewable energy resources, storage systems, electronic transmission and distribution systems, and e-mobility. Notably, power electronics play an underpinning role in the grid modernization. However, it imposes new challenges to reliable planning and operation of power system. So far, the reliability of power electronics has been comprehensively discussed in device- and converter-level, including physics of failure analysis and design for reliability. However, the reliability modeling and enhancement in power system level requires more investigation. This tutorial aims to discuss the reliability of future power electronics-based power system (PEPS) by emerging different aspects of concepts from component up to system level. It contains the following four parts. The first part explains the structure of modern electric grids and its challenges with the restructured environment. The second part describes the fundamentals of reliability in power systems. The next section covers the reliability of PEPS. The last section discusses the approach to bridge the reliability of modern PEPS from converter to power system levels. The main objectives of the tutorial are summarized in the following:
- Introduction to grid modernization, restructuring the power systems, important components of future power grids, the induced challenges by the new technologies (e.g. power electronics, renewable energies, storages, etc.), and the importance of reliability in modern power system.
- Overview on the fundamentals of the conventional power system reliability and risk, failures in power systems, reliability assessment methods and reliability of onshore and offshore power networks.
Bridge between the reliability of power systems and power electronics, reliability modelling and enhancement in PEPS, mission profile analysis and time variant reliability modelling in power electronic systems.