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Binary Capacitor Voltage Control-based MMC with a Hybrid Arm Design for Low Nominal DC Voltage Applications | IEEE Conference Publication | IEEE Xplore

Binary Capacitor Voltage Control-based MMC with a Hybrid Arm Design for Low Nominal DC Voltage Applications


Abstract:

The main technical challenge of multilevel converters for low nominal voltage is to abate hardware and control complexity and concomitantly aggrandize DC-AC power- conver...Show More

Abstract:

The main technical challenge of multilevel converters for low nominal voltage is to abate hardware and control complexity and concomitantly aggrandize DC-AC power- conversion quality and efficiency. In the modular multilevel converter (MMC), the half- or full-bridge sub-modules with the arm inductor can derive various sub-module capacitor voltage control approaches. This paper proposes a new MMC concept utilizing the above MMC's advantage to address the challenge effectively. The proposed binary capacitor voltage control and circulating current control regulate the sub-module capacitor voltages at the power-of-two reference values and the converter-arm voltages at the multilevel reference values through a Lyapunov stability-based cost-function optimization approach exploiting the binary numeral system and the proposed hybrid arm design. Therefore, the proposed MMC improves the DC-AC power conversion quality and efficiency by synthesizing a sinusoidal AC voltage with a significantly large number of voltage levels while extensively reducing hardware and control complexity for low nominal DC voltage applications. A simulation study is presented to demonstrate the steady-state and dynamic performance of the proposed MMC under several conditions.
Date of Conference: 10-12 March 2021
Date Added to IEEE Xplore: 18 June 2021
ISBN Information:
Conference Location: Valencia, Spain

References

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