A Simplified Nearest Level Control (NLC) Voltage Balancing Method for Modular Multilevel Converter (MMC)
A Simplified Nearest Level Control (NLC) Voltage Balancing Method for Modular Multilevel Converter (MMC)
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DOI：
10.1109/tpel.2014.2317705
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发表时间：
2015
影响因子：
6.7
通讯作者：
P. M. Meshram;V. Borghate
中科院分区：
文献类型：
--
作者：
P. M. Meshram;V. Borghate
提出了一种简化的模块化多电平变换器最近电平控制平衡方法。所提出的方法既不需要单独排序的子模块电压，也没有冗余的开关状态。一旦基于要接通的子模块的数量完成子模块的分类，就可以在该方法的实施的整个阶段执行子模块的识别。所提出的方法也不需要在门脉冲产生阶段的各个子模块的状态。所提出的方法中的门逻辑可以借助于电压电平的切换状态来实现。通过所提出的平衡方法的那些简化和去除一些阶段可以在实现级别上简化并导致更少的处理器时间。图片展示进一步有助于巩固对该方法不同阶段的理解。严格的模拟进行了开放和一个突出的闭环应用，即，基于模块化多电平变换器的高压直流系统的仿真结果验证了所提出的简化平衡方法在正常和紧急情况下的正确性和有效性。
In this paper, a simplified nearest level control balancing method for modular multilevel converter is presented. The proposed method neither requires individual sorting of the submodule voltages nor the redundancy of the switching states. Once the sorting of the submodules is done on the basis of the number of the submodules to be switched on, the identifications of the submodules can be carried out throughout the stages of the implementation of the this method. The proposed method also does not require the individual submodule status in the gate pulse generation stage. The gate logic in the presented method can be implemented with the help of the switching states of the voltage levels. Those simplifications and removing of the some of the stages by the proposed balancing method may ease and lead to the less processor time at the implementation level. The pictorial presentation further helps in consolidating the understanding of the different stages of the method. Rigorous simulations are carried out for open and one of the prominent closed-loop applications, i.e., modular multilevel converter-based high-voltage direct current to demonstrate the validity and effectiveness of the proposed simplified balancing method under normal and emergency conditions.