Open AccessStart control of an M 3 C‐based FFTS
Author(s) -
Zhang Xiaoliang,
Wang Xifan,
Wang Xiuli,
Huang Qihang,
Fan Jiajie,
Zhou Qian
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8401
Subject(s) - reactance , modular design , transmission (telecommunications) , computer science , limit (mathematics) , resistor , transmission system , fast fourier transform , electronic engineering , control (management) , control theory (sociology) , electrical engineering , voltage , mathematics , engineering , algorithm , telecommunications , mathematical analysis , artificial intelligence , operating system
The fractional frequency transmission system (FFTS) can multiply increase transmission capacity by using a lower frequency to reduce the reactance of the AC transmission system. The modular multi‐level matric converter (M 3 C) as the new generation of the AC/AC converter is the critical equipment of FFTS. The self‐start control strategy for M 3 C‐based FFTS is proposed and the whole start‐up procedure is divided into the uncontrollable stage and controllable stage. The model of the equivalent circuit in an uncontrollable stage is built and the mathematical relation between the maximum charging current and the current‐limit resistor is obtained. Finally, a digital simulation system of M 3 C‐based FFTS is established, and the effectiveness of the proposed control strategies is verified by simulation results.