Enhanced control strategy of full-bridge modular multilevel converter
Enhanced control strategy of full-bridge modular multilevel converter
复制标题
DOI：
10.1109/icrera.2015.7418644
复制
发表时间：
2015-11
期刊：
影响因子：
--
通讯作者：
G. Adam;S. Finney;B. Williams
中科院分区：
文献类型：
--
作者：
G. Adam;S. Finney;B. Williams
本文介绍了一种控制方法，允许单元电容电压的全桥模块化多电平变换器（FB-MMC）的输入直流环节电压独立控制。此外，这种控制方法提供了从双极直流链路电压操作FB-MMC的可能性;因此，为构建具有可逆直流链路电压的通用混合直流电网创造了新的可能性，其中传统的线路换向电流源转换器可以与电压源转换器一起操作。此外，所提出的控制方法提高了直流故障穿越的FB-MMC相比，现有的方法。这可以通过主动控制臂电流和单元电容器电压以及充分利用FB-MMC冗余开关状态来实现。FBMMC与可逆的直流链路电压和解耦控制的单元电容器电压从直流链路电压的操作演示使用模拟。这项工作的主要结果和影响突出。
This paper describes a control approach that allows the cell capacitor voltages of the full-bridge modular multilevel converter (FB-MMC) to be controlled independent of the input dc link voltage. Moreover, this control approach offers the possibility of operating FB-MMC from bi-polar dc link voltages; thus, creating new possibilities for building generic hybrid dc grids with reversible dc link voltage, where the conventional line commutated current source converters can operate alongside voltage source converters. Furthermore, the presented control approach improves the dc fault ride-through of the FB-MMC compared to existing approaches. This could be achieved by an active control of the arm currents and cell capacitor voltages, and full exploitation of the FB-MMC redundant switch states. Operation of the FBMMC with reversible DC link voltage and decoupled control of the cell capacitor voltages from the dc link voltage are demonstrated using simulations. The major findings and implications of this work are highlighted.