Kaiqing Tian

Title: Innovations of Inventor Kaiqing Tian

Introduction

Kaiqing Tian is a prominent inventor based in Kunming, China. He has made significant contributions to the field of electrical engineering, particularly in the area of adaptive systems for wind power and distribution networks. With a total of 2 patents, his work focuses on enhancing the reliability and efficiency of electrical systems.

Latest Patents

One of his latest patents is titled "Method and system for adaptive single-phase reclosing of wind farm AC transmission lines." This invention relates to a method and system for adaptive reclosing of single-phase AC transmission lines in wind power systems. The invention utilizes single-ended electrical quantity to determine the type of fault. After a fault occurs, a signal acquisition device is used to sample the voltage of the fault phase. The obtained voltage is subjected to short-time Fourier transform to extract the amplitude of the fundamental frequency voltage component, and then processed with differential amplification to construct a fault nature identification criterion. Combined with a sliding time window for fault identification, if it is identified as a permanent fault, the reclosing device is locked out; if it is identified as a transient fault, the fault disappearance time is calculated to determine the reclosing time and output the closing signal. This invention is designed for adaptive reclosing after a circuit breaker trips in wind power AC transmission lines.

Another significant patent is the "Adaptive arc suppression method for ground faults in a combined active and passive distribution network." This application presents an adaptive arc suppression method for ground faults in distribution networks, merging active and passive relay protection strategies. The method proceeds as follows: based on collected ground parameters, the fault phase is identified; compensation current is calculated from the fault's electromotive force, ground leakage resistance, and ground capacitance; current is injected at the neutral point according to the compensation current; finally, the arc suppression scheme is executed based on the zero-sequence voltage of the network's busbars. This approach incorporates both voltage- and current-based methods, addressing the limitation of fixed operation scenarios in traditional arc suppression methods. By quickly adapting to various fault situations, this method ensures an efficient and prompt response tailored to specific scenario requirements.

Career Highlights

Kaiqing Tian is affiliated with the Kunming University of Science and Technology, where he contributes to research and development in electrical engineering. His innovative work has garnered attention in academic and professional circles, showcasing his expertise in adaptive systems.