Experimental validation of a parallel hybrid modular multilevel voltage source converter for HVDC transmission
Experimental validation of a parallel hybrid modular multilevel voltage source converter for HVDC transmission
复制标题
高压直流输电并联混合模块化多电平电压源换流器的实验验证
DOI：
10.1109/apec.2013.6520512
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Patrick W. Wheeler
中科院分区：
文献类型：
--
作者：
Emmanuel Amankwah;Alan J. Watson;R. Feldman;Jon C. Clare;Patrick W. Wheeler
本文讨论了一个小规模的实验室模型，以验证最近提出的并联混合模块化多电平电压源换流器，这是用于高压直流输电应用的操作。该变换器的特征在于由能够以双向电流操作的多个半桥单元和用于每个变换器相布置的相关联的全桥变换器组成的“链节”布置。每个半桥单元由两个双向开关和一个本地存储电容组成。需要将“链节”单元的本地存储电容器上的电压控制在公差带内，以确保转换器的可持续操作。本文还提出了一种电容器电压平衡方案，该转换器，并进一步证明了黑启动能力，使用较低的额定辅助直流电源。转换器的四象限操作也被证明是预期的电网连接的电压源转换器。仿真和实验结果，以支持转换器的操作。
This paper discusses a small scale laboratory model constructed to validate the operation of a recently proposed parallel hybrid modular multilevel voltage source converter which is intended for HVDC applications. The converter is characterized by a `chainlink' arrangement composed of a number of half bridge cells capable of operating with bidirectional current and an associated full bridge converter for each converter phase arrangement. Each half bridge cell is made up of two bidirectional switches and a local storage capacitor. The voltages on the local storage capacitors of the `chainlink' cells need to be controlled within a tolerance band to ensure sustainable operation of the converter. The paper also presents a capacitor voltage balancing scheme for this converter and further demonstrates black start capability using a lower rated auxiliary DC source. Four quadrant operation of the converter is also demonstrated as would be expected of a grid connected voltage source converter. Simulation and experimental results are presented to support the converter operation.