Lei Du

ORCID: 0000-0002-4507-886X
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About
Contact & Profiles
Research Areas
  • Silicon Carbide Semiconductor Technologies
  • Multilevel Inverters and Converters
  • Foreign Language Teaching Methods
  • Educational Technology and Pedagogy
  • Advanced DC-DC Converters
  • Hybrid Renewable Energy Systems
  • Microgrid Control and Optimization
  • Electric and Hybrid Vehicle Technologies
  • Technology-Enhanced Education Studies

Zhejiang University
2023

Hebei University of Science and Technology
2019

Switched-capacitor technology is widely used in low power dc-dc converter, especially management of the integrated circuit. These circuits have a limitation: high pulse currents will occur at switching transients, which reduce efficiency and cause electromagnetic interference problems. This makes it difficult to use this high-power-level conversion. paper presents new design method for converter with switched-capacitorldquo technology. The can current usually causes serious problem...

10.1109/tpel.2007.915043 article EN IEEE Transactions on Power Electronics 2008-03-01

In the spring of 2020, due to outbreak COVID-19, college students in China had take online classes at home. The present paper aims explore whether suffer more anxiety and what factors may affect students’ anxiety. study finds that addition demographic variables like age gender, such as grade, English test scores, self-concept, network stability can lead Constructive suggestions are given alleviate improve learning effect.

10.17507/tpls.1304.12 article EN Theory and Practice in Language Studies 2023-04-01

Background: Aiming at the power fluctuation of wind/ photovoltaic (PV)/ energy storage (ES) hybrid conversion system injected into grid, this paper builds a mathematical model distributed microgrid with PV coupling to DC side doubly fed induction generator (DFIG) and proposes hierarchical phased coordination strategy. Methods: The hydrogen part Supercapacitor (SC) are used as backup adjustment units ensure supply reliability compensate for shortcomings wind solar intermittent. strategy...

10.2174/2352096512666190906111215 article EN Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) 2019-09-07
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