学术报告201615期

报告题目：Cost-effective  harmonic mitigation solutions to motor drives

报 告 人： Aalborg  University, Denmark   杨永恒 助理教授

报告时间：5月27日（周五）上午10：00

报告地点：南一楼中311室

邀  请  方：“多谱信息处理技术”国家级重点实验室

Abstract：In  modern industrial motor drive applications, low-cost, simple-structure, and  high-reliability are the major concerns. Among various standardized front-end  solutions, the diode rectifiers and/or silicon-controlled rectifiers are still  the most commonly employed rectification apparatus in adjustable speed drive  systems. However, these “uncontrollable” or “half-controllable” rectifications  also bring harmonics to the grid, and thus regulations have been released and  are continuously updated. To deal with the harmonic challenge, cost-effective  solutions should be proposed and developed. In this talk, a novel harmonic  mitigation is introduced, which enables a significant harmonic cancellation in  motor drive applications. The effectiveness is enhanced by mixing non-linear  loads – silicon controlled rectifier systems, where the grid currents can be  phase-shifted. Results are also provided, which show that the solution can  achieve a very low THD of the grid current, and the solution is comparable to  traditional multi-pulse transformer based strategies.

Bio：Yongheng  Yang (S'12 – M'15) received the B.Eng. degree from Northwestern Polytechnical  University, Xian, China, in 2009, and the Ph.D. degree from Aalborg University,  Aalborg, Denmark, in 2014. He was a  Post-Graduate with Southeast University, Nanjing, China, from 2009 to 2011. In  2013, he was a Visiting Scholar with the Department of Electrical and Computer  Engineering, Texas A&M University, College Station, USA. Since 2014, he has  been with the Department of Energy Technology, Aalborg University, where he is  currently an Assistant Professor. His research interests are focused on grid  integration of renewable systems, power converters design and control, harmonics  identification and mitigation, and reliability in power electronics. He is a Member of the IEEE Power  Electronics Society Students and Young Professionals Committee. Dr. Yang serves  as a Guest Associate Editor of the IEEE JOURNAL OF EMERGING AND SELECTED TOPICS  IN POWER ELECTRONICS special issue on Power Electronics for Energy Efficient  Buildings. He also serves as a Guest Editor of Applied Sciences special issue on  Advancing Grid-Connected Renewable Generation Systems.