Hongxia Qin

Title: Innovations of Hongxia Qin in VSC-HVDC Systems

Introduction

Hongxia Qin is a notable inventor based in Beijing, China. He has made significant contributions to the field of electrical engineering, particularly in the area of Voltage Source Converter-High Voltage Direct Current (VSC-HVDC) systems. His innovative approach addresses critical challenges in power transmission and control.

Latest Patents

Hongxia Qin holds a patent for a "Suppression method of high-frequency resonance for VSC-HVDC system based on nonlinear filter in voltage feed-forward control." This invention focuses on utilizing a nonlinear filter for the voltage feed-forward link in the current inner loop control. The method involves extracting each sequence component of the AC voltage, calculating the average value at N sample points, and comparing it with the previous output of the nonlinear filter. This process results in a fixed value that varies according to gradient, effectively suppressing high-frequency resonance without compromising the system's rapidity. The invention is particularly advantageous as it can be implemented in existing secondary control software without the need for additional equipment, making it a cost-effective solution for engineering practices.

Career Highlights

Hongxia Qin's career is marked by his dedication to advancing VSC-HVDC technology. His innovative methods have the potential to enhance the stability and efficiency of power systems, particularly in mitigating risks associated with over-current during voltage disturbances.

Collaborations

Hongxia has collaborated with notable colleagues, including Yu Wang and Fengmei Cao, who contribute to his research and development efforts in the field.

Conclusion

Hongxia Qin's contributions to VSC-HVDC systems exemplify the importance of innovation in electrical engineering. His patented methods not only address critical technical challenges but also pave the way for more efficient and reliable power transmission systems.