A Novel Modulation Function-Based Control of Modular Multilevel Converters for High Voltage Direct Current Transmission Systems
A Novel Modulation Function-Based Control of Modular Multilevel Converters for High Voltage Direct Current Transmission Systems
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DOI：
10.3390/en9110867
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发表时间：
2016-10
期刊：
影响因子：
3.2
通讯作者：
M. Mehrasa;E. Pouresmaeil;S. Zabihi;J. C. T. Caballero;J. Catalão
中科院分区：
文献类型：
--
作者：
M. Mehrasa;E. Pouresmaeil;S. Zabihi;J. C. T. Caballero;J. Catalão
针对高压直流输电系统中模块化多电平换流器（Modular Multiple Converters，MMC）的运行问题，提出了一种基于调制函数的新方法，该方法包括对调制指数和相位的分析。所提出的基于调制函数的控制技术是基于对a-b-c参考系中的所有MMC电压和电流的彻底和精确的分析而开发的，其中交流（AC）侧电压是要获得的第一目标。利用交流侧电压，MMC上下臂电压的组合被实现为所提出的调制功能的主要结构。本文的主要贡献是获得了两个非常简单的新的调制函数来控制MMC性能在不同的操作条件。基于调制函数的控制技术的特点是：（1）该控制技术非常简单，可以在a-b-c坐标系中实现，不需要Park变换;（2）此外，该控制技术还考虑了MMC模型的固有特性。考虑到这些属性导致构建一个控制技术，对MMC参数的变化是鲁棒的，也是一个非常好的跟踪方法MMC输入电流的分量。这些特性使得MMC的运行性能得到显著改善，可以作为HVDC结构中的整流器。通过MATLAB/SIMULINK软件进行了仿真研究，结果验证了所提出的基于调制函数的控制技术的有效性。
In this paper, a novel modulation function-based method including analyses of the modulation index and phase is proposed for operation of modular multilevel converters (MMCs) in high voltage direct current (HVDC) transmission systems. The proposed modulation function-based control technique is developed based on thorough and precise analyses of all MMC voltages and currents in the a-b-c reference frame in which the alternating current (AC)-side voltage is the first target to be obtained. Using the AC-side voltage, the combination of the MMC upper and lower arm voltages is achieved as the main structure of the proposed modulation function. The main contribution of this paper is to obtain two very simple new modulation functions to control MMC performance in different operating conditions. The features of the modulation function-based control technique are as follows: (1) this control technique is very simple and can be easily achieved in a-b-c reference frame without the need of using Park transformation; and (2) in addition, the inherent properties of the MMC model are considered in the proposed control technique. Considering these properties leads to constructing a control technique that is robust against MMC parameters changes and also is a very good tracking method for the components of MMC input currents. These features lead to improving the operation of MMC significantly, which can act as a rectifier in the HVDC structure. The simulation studies are conducted through MATLAB/SIMULINK software, and the results obtained verify the effectiveness of the proposed modulation function-based control technique.