报告人: Kang Ma 博士 英国University of Bath大学讲师Lecturer(电气工程)
联系人: 叶 林 教授 010-62737842、巨云涛 副教授 18911241286
The nature, impact, and solutions for three-phase imbalance in the European/UK’s low voltage networks.
Over 70% of the UK’s low voltage (415V) distribution networks suffer from moderate to severe degrees of three-phase imbalance, including voltage, current, and power imbalance. The imbalance causes: 1) increased wear and tears to induction motors; 2) additional energy losses along the neutral wire due to an additional power flow along the neutral, costing up to hundreds of millions of British pounds per year; 3) and additional network investment costs due to inefficient uses of network assets, costing billions of British pounds per year.
Targeting three-phase imbalance in low voltage (LV) distribution networks, my research consists of three hierarchies:
1) Understand the nature of three-phase imbalance, i.e., the severity and its temporal-spatial distributions covering more than a year and millions of low voltage networks in the UK. With increasing low carbon technologies (LCTs) such as electric vehicles and heat pumps connected to LV networks, I will also investigate how the nature of three-phase imbalance will change over time.
2) Understand the impact of three-phase imbalance on the network, including energy losses and additional network investment costs. The impact analysis will consider not only the status quo but also future scenarios with a high penetration of LCTs.
Find solutions to mitigate three-phase imbalance in the existence of
LCTs. Candidate solutions include phase swapping, demand-side response
(including the smart charging of electric vehicles), the use of
solid-state transformers and other smart technologies, etc.
My research will be valuable for distribution network operators (DNOs)
in the sense that it will help DNOs improve operation efficiency and
save costs. Further, by rebalancing three-phase supply, my research will
also release potential network capacities to accommodate LCTs. All the
above will also reduce CO2 emissions for the society.
Kang Ma is now working as a Lecturer (assistant professor level) at University of Bath, UK. His research focuses on three-phase unbalanced low voltage networks. He received his PhD degree in Electrical Engineering from the University of Manchester (UK) in 2011 and his B.Eng. degree from Tsinghua University in 2007. He worked as an R&D engineer at China Electric Power Research Institute from 2011 to 2014, during which time he developed the first version of the reliability assessment module for a distribution network planning platform. This platform has been widely applied to over 20 provincial grid companies in China. He has a number of high-cited papers published on top-ranking journals such as IEEE Transactions(USA) and IET Proceedings(UK) etc.
Dr. Kang Ma
Lecturer, Centre for Sustainable Power Distribution
Department of Electronic & Electrical Engineering
University of Bath
Claverton Down Bath, BA2 7AY
University Page: http://www.bath.ac.uk/elec-eng/people/ma/
注：该报告为 **2017年中国国家自然科学基金委员会(NSFC)-英国皇家学会(RS）双边国际合作交流项目 支持