This paper aims to assess the lifetime of a T-type active front end (AFE) converter in the context of Grid-to-Vehicle (G2V) and Vehicle-to-Grid (V2G) applications providing various grid services. To achieve this goal, the research paper presents two G2V and three V2G profiles and measures the junction temperature oscillations for the entire mission profile. Then, the temperature profiles are imported into a reliability assessment model to determine each mission profile's impact on the system's reliability.

In this paper, an advanced method for implementing active thermal control is proposed that can be helpful for smoothing repetitive junction temperature swing, which is one of the main reasons for wear-out failure in Wide bandgap (WBG)-based (i.e., SiC) power electronics converters (PEC). Utilizing current-source gate-drive, rise/fall (tON/tOFF) time during switching transition can be controlled, resulting in shaping switching losses in the form that can minimize junction temperature swings. The proposed method is implemented for an AC-DC converter and the simulation results validate the performance of the proposed method. It shows that by reducing junction temperature swing by 7°C, the lifetime of the PEC can be improved by a factor of 2.

This paper proposes an interoperable energy management system (EMS) for grid-connected HESSs, enabling the provision of ancillary services to the grid. Power systems are evolving towards a more renewable and decentralised structure, where energy storage systems (ESS) have emerged as a key energy asset to ensure the power balance and the system stability. In this context, hybrid ESSs (HESS) are an interesting solution because they take advantage of the dynamic properties of different ESS technologies. The proposed EMS structure ensures an adequate internal power allocation between the different ESS packs even when operating at power or state of charge limits. The proposed structure can be easily adapted and combined with specific control functions to provide a wide variety of grid services. Moreover, a power dispatch algorithm is included to allocate the power between the parallel power converters to maximise the system efficiency. The results from two representative use cases demonstrate the effectiveness of the proposed EMS to determine the operating setpoints of a modular HESS and to provide different grid-oriented services.