Open AccessComputationally efficient modeling method of MMC based on arm equivalent time‐variant capacitance
Author(s) -
Li Botong,
Liu Yichao,
Li Bin,
Hong Chao,
Zhang Ye,
Yang Jian
Publication year - 2019
Publication title -
international transactions on electrical energy systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 42
ISSN - 2050-7038
DOI - 10.1002/etep.2732
Subject(s) - modular design , capacitor , capacitance , transient (computer programming) , voltage , electronic engineering , transmission system , computer science , transmission (telecommunications) , voltage source , control theory (sociology) , engineering , topology (electrical circuits) , electrical engineering , physics , control (management) , electrode , quantum mechanics , artificial intelligence , operating system
Summary With the increase of the voltage as well as the capacity of the voltage source converter–based high voltage direct current (VSC‐HVDC) transmission system, it is difficult for the traditional modular multilevel converter (MMC) modeling method, which is based on the modeling of switching devices, to meet the demand for the simulation speed of the multiterminal transmission system. This paper proposed a computationally efficient modeling method of MMC by which the simulation speed is entirely unrelated to the number of the cascaded submodules. The paper is constructed as follows: The method for converting all the cascaded submodules in an arm into a single time‐variant capacitor was proposed first. Based on trapezoidal integration, the transient companion model of the equivalent time‐variant capacitor was studied. Then the efficient model of MMC is established based on arm equivalent time‐variant capacitor. Finally, the simulation accuracy and speed of the efficient model are verified in PSCAD/EMTDC.