CAJ | 학술논문

为了得到能够直观反映装置运行规律的数学模型，为装置性能的研究、主电路参数设计及控制系统设计等提供研究基础，将开关函数和瞬时功率结合，建立模块化多电平换流器（modular multi-level converter，MMC）的时域解析数学模型。该模型给出换流器交直流电压、桥臂电流电压、桥臂子模块电容电压总和以及单个子模块电容的电压电流的时域解析表达式，可以正确反映上述各电气量与主回路参数的关系。计算和仿真结果表明，该建模方法是可行的，并具有较高的精确度。
위료득도능구직관반영장치운행규률적수학모형，위장치성능적연구、주전로삼수설계급공제계통설계등제공연구기출，장개관함수화순시공솔결합，건립모괴화다전평환류기（modular multi-level converter，MMC）적시역해석수학모형。해모형급출환류기교직류전압、교비전류전압、교비자모괴전용전압총화이급단개자모괴전용적전압전류적시역해석표체식，가이정학반영상술각전기량여주회로삼수적관계。계산화방진결과표명，해건모방법시가행적，병구유교고적정학도。
A mathematical model that can distinctly reflect device operation principle is extremely needed for deep research on steady and transient performance analysis, main circuit design, control system design etc. In this paper, by using a combination of switch function and instantaneous power, a mathematical model describing time domain analytic function of Modular Multi-Level Converter was presented. Based on it, the transient value of converter AC and DC voltage, arm voltage and current, sub-module capacitor voltage sum in an arm, sub-module capacitor voltage and current related to main circuit parameter can be calculated. From the calculation and simulation results, it is concluded that the modeling method is available and its calculation results are comparatively precise.