وبینار Fundamentals and Application-Oriented Evaluation of Solid-State Transformer Concepts

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Fundamentals and Application-Oriented Evaluation of Solid-State Transformer Concepts

در تاریخ ۹ اردیبهشت ماه توسط پروفسور Kolar از دانشگاه  ETH سوییس برگزار می شود. برای ثبت نام و شرکت به لینک زیر مراجعه نمایید (از فیلتر شکن استفاده کنید):

Presenters: Prof. Johann Kolar & Dr. Jonas Huber, ETH Zurich

Abstract: Solid-State Transformers (SSTs) provide isolation and power flow control between medium-voltage and low-voltage AC or DC systems, and are formed by input- and output-side power electronic converters, which are linked through a medium-frequency transformer. Accordingly, SSTs show high power density and are offering full controllability of the terminal currents and/or the transferred power and, in case of AC voltages, the reactive power at the input and the output side.  Therefore, SSTs are well suited for replacing bulky low-frequency (LF) transformers of high-power EV charging stations, datacenters, traction vehicles etc. and are in general seen as key elements of future smart microgrids. However, the connection to MV, the high overall complexity, the relatively high realization costs, and the potentially lower efficiency in case of AC/AC conversion are still major challenges for practical applications

The webinar starts with a brief review of transformer scaling laws and then identifies the motivation, requirements, and challenges associated with SST applications. Next, we discuss the most important conceptual and design aspects of SSTs such as single-cell vs. multi-cell topologies using Si or SiC semiconductors, isolated front-end vs. isolated back-end converter architectures, reliability of multi-cell converters, protection, and medium-frequency transformer realization. In this context, we also present latest results of research at ETH Zurich, which currently targets advanced air-core medium-frequency transformer designs considering close similarities to inductive power transfer systems. Finally, the most promising mid-term application scenarios for SSTs, e.g., ultra-fast EV charging, modular power supply systems of datacenters, collector grids of utility-scale PV plants or wind farms, and AC and DC microgrids in smart cities, are identified and briefly described. Furthermore, we outline future research areas before we conclude with a critical evaluation of the SST concept against LF-transformer-based solutions

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