物流科学与工程研究院专家讲座：Static and Rotary Transformers for Renewable Energy Storage System
讲座时间：2026年7月2日14:00—15:00
讲座地点：泰山科研楼208
讲座专家：Nigel Schofield
讲座题目：Static and Rotary Transformers for Renewable Energy Storage System
讲座内容：
The introduction of Renewable Energy Sources (RESs) to electrical power grids creates concerns over grid power imbalances. Most RESs are non-dispatchable, meaning that natural elements have a significant impact on how much power can be produced, which leads to issues with frequency stability, maintaining grid energy balance and supporting overall fault levels. It also leads to issues with reactive power provision, often needing compensation to maintain voltage levels, and can influence short circuit fault currents when connected at the distribution level. Therefore, RES poses operational challenges and thus the interest in using electrochemical battery storage systems to provide bi-directional power flow to maintain AC power grid transient frequency stability (TESS) and support more sustained energy delivery (BESS). The voltage level constraints of commercial DC-DC and voltage source converter (VSC) power electronic devices is limited to around 800V operational (1200V IGBT devices). Although higher voltage power electronic devices and VSC structures are being developed, to-date, the 1200V IGBT is the industrial benchmark device. This results in the 3-phase AC connection of the battery storage system via a VSC of around 690 Vrms in practice. Thus, an interface transformer is necessary in the TESS or BESS system to connect to higher voltage,3-phase electrical networks.
This presentation presents a sizing study for the static transformer in either a TESS or BESS system, as rated for operation and lifetime longevity. The static transformer is then compared with a rotary transformer system comprised of a low voltage induction machine mechanically integrated with a high voltage, low per unit inductance synchronous machine that electrically connects to the utility power grid. While providing the necessary voltage conversion from the switched DC system, and the energy transfer, the rotary transformer component also provides transient fault current to the grid during grid disturbances
专家简介:
Nigel Schofield received the degrees of B.Eng. (Hons.) in Electrical Power Engineering, and Ph.D. for research on the field-weakening capability of brushless permanent-magnet traction machines, from the University of Sheffield, UK, in 1990 and 1997, respectively. During the period 1993 to 1995 he served as a Senior Experimental Officer in the Department of Electronic and Electrical Engineering (EEE) at the University of Sheffield, before taking up the post of Design Engineer in industry.
From 1997 to 2001, Dr. Schofield was a post-doctoral researcher in the Electrical Machines and Drives Research Group, Dept. of EEE, University of Sheffield, and from 2001 to 2004 a Lecturer in the Dept. of EEE. On 1 July 2004 he was appointed to a Mechatronics Lectureship in the School of Electrical and Electronic Engineering, at the University of Manchester, UK, and a Senior Lecturer in the School in 2009 where he lectured across all undergraduate years and on the Power Conversion M.Sc. On 1 Jan. 2013 Dr. Schofield joined the Department of Electrical and Computer Engineering at McMaster University, Ontario, Canada, as a Full Professor with Tenure. On 1 May 2017 Dr. Schofield joined University of Huddersfield, UK. His research interests include electro-magnetic power-trains for all- and hybrid-electric vehicles; the vehicular application of electro-chemical and electro-static energy sources; hydrogen fuel cell systems; aerospace machines and actuators; the industrial application of electro-magnetic devices and wind generator design and renewable energy schemes. Prof. Schofield is a Chartered Engineer and member of the UK IET and IEEE.
Contact details:
Nigel Schofield
University of Huddersfield, UK
Email: n.schofield@hud.ac.uk
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