Search Results - zhiyuan+zhou

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Grid Control for Unknown Resonance Events (CURE)
Unmet Need: Detection and damping of resonance events in a power grid Complex electric distribution systems cannot be perfectly modeled to reflect every duty cycle and configuration of each component which might come on-line. Recent instances of forced oscillations in wide area networks illustrate the difficulty in quickly locating their causes, and...
Published: 6/9/2023   |   Inventor(s): Vaithianath Venkatasubramanian, Yuan Zhi, Habib Wajid
Keywords(s): Controls, Oscillations, Power grid, Resonance
Power Supply Modulators with Voltage and Frequency Partitioning
Abstract:Efficiency improvements of power amplifiers in wireless communication devices. Envelope tracking is a popular technique to improve efficiency of power amplifiers in current 4G LTE communication systems. However, next-generation wireless communications will feature ultra-high bandwidth, such as 250 MHz, to support the increasing demand for...
Published: 5/25/2023   |   Inventor(s): Deuk Heo, Zhiyuan Zhou, Nghia Tang