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A Distributed Controlled-Impedance-Source Method for Modular Multilevel Converter
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DOI：10.1109/TPEL.2026.3651515.png)
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Abstract
En 中文
Modular multilevel converter (MMC) based high voltage direct current system have been developed. With increased number of submodules (SMs), the implementation of centralized control becomes more complicated, and high band-width communication is required in conventional distributed control methods. To address the above technical bottlenecks, a distributed controlled-impedance-source method for MMC is proposed in this article. By shaping SMs as controlled-impedance-source, the ac side energy is automatically transferred to MMC. And the energy transfers from MMC to dc side by regulating the dc component of the SM output. The self-balancing property of MMC internal energy is demonstrated by theoretical analysis. The proposed method greatly reduces communication requirements between central and local controllers, which can be realized in a highly modular and simpler way. Experimental results based on the RT-LAB platform verify the feasibility of the proposed method.
Keywords:
Communication reduction
controlled-impedance-source
distributed control
modular multilevel converter high-voltage direct current system (MMC-HVdc)
Journal
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6.5
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1.7W
Citations:
8.3W