Y
Yu Liu
Researcher at North Carolina State University
Publications - 26
Citations - 1148
Yu Liu is an academic researcher from North Carolina State University. The author has contributed to research in topics: Control theory & Photovoltaic system. The author has an hindex of 14, co-authored 26 publications receiving 1076 citations. Previous affiliations of Yu Liu include Eaton Corporation.
Papers
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Smart grid technologies
TL;DR: Development of 15-kV SiC IGBTs and their impact on utility applications is discussed, and the need for power semiconductor devices with high-voltage, high- frequency, and high-temperature operation capability is growing.
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Real-Time Calculation of Switching Angles Minimizing THD for Multilevel Inverters With Step Modulation
Yu Liu,Hoon Hong,Alex Q. Huang +2 more
TL;DR: A novel real-time algorithm for calculating switching angles that minimizes total harmonic distortion (THD) for step modulation is proposed and a mathematical proof that the output voltage has the minimum THD is given.
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Small-Signal Model-Based Control Strategy for Balancing Individual DC Capacitor Voltages in Cascade Multilevel Inverter-Based STATCOM
TL;DR: A new feedback control strategy for balancing individual DC capacitor voltages in a three-phase cascade multilevel inverter-based static synchronous compensator based on the detailed small-signal model that can work well in all operation modes.
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Real-Time Algorithm for Minimizing THD in Multilevel Inverters With Unequal or Varying Voltage Steps Under Staircase Modulation
Yu Liu,Hoon Hong,Alex Q. Huang +2 more
TL;DR: A real-time algorithm for multilevel inverters with unequal or varying voltage steps under the staircase modulation results in the minimal total harmonic distortion of the output voltage of the inverter, which is proved by rigorous mathematical derivations in this paper.
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Trinary Hybrid 81-Level Multilevel Inverter for Motor Drive With Zero Common-Mode Voltage
Yu Liu,Fang Lin Luo +1 more
TL;DR: Benefiting from the trinary hybrid topology of the inverter, 81-level voltages per phase can be synthesized with the fewest components and the relationship between the fundamental load voltage and the modulation index is precisely linear.