3 papers
eess.SY2025
Exploiting the Hidden Capacity of MMC Through Accurate Quantification of Modulation Indices
Qianhao Sun, Jingwei Meng, Ruofan Li +5
The modular multilevel converter (MMC) has become increasingly important in voltage-source converter-based high-voltage direct current (VSC-HVDC) systems. Direct and indirect modul…
eess.SY2025
A Grid-Forming HVDC Series Tapping Converter Using Extended Techniques of Flex-LCC
Qianhao Sun, Ruofan Li, Jichen Wang +5
This paper discusses an extension technology for the previously proposed Flexible Line-Commutated Converter (Flex LCC) [1]. The proposed extension involves modifying the arm intern…
eess.SY2024
A Methodology for Power Dispatch Based on Traction Station Clusters in the Flexible Traction Power Supply System
Ruofan Li, Qianhao Sun, Qifang Chen +1
The flexible traction power supply system (FTPSS) eliminates the neutral zone but leads to increased complexity in power flow coordinated control and power mismatch. To address the…