Design Procedure of MMC-HVDC System: Comprehensive Consideration of Internal and External Dynamics

This paper proposes a systematic design procedure with comprehensive consideration of the internal and external dynamics in modular multilevel converter high voltage direct current (MMC-HVDC) transmission system. Previous studies on MMC parameter selection separately deal with each specific componen...

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Bibliographic Details
Published in:IEEE access 2020-01, Vol.8, p.1-1
Main Authors: Kang, Jaesik, Kang, Dae Wook, Lee, Jong Pil, Yoo, Dong Wook, Shim, Jae Woong
Format: Article
Language:English
Subjects:
Arm inductance
capacitance
Converters
design
Digital simulation
Direct current
Electric power transmission
Energy storage
high-voltage direct current (HVDC)
HILS
Inductance
modular multilevel converter (MMC)
modulation index
Parameters
PSCAD/EMTDC
RTDS
Storage capacity
sub-module (SM)
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Summary:This paper proposes a systematic design procedure with comprehensive consideration of the internal and external dynamics in modular multilevel converter high voltage direct current (MMC-HVDC) transmission system. Previous studies on MMC parameter selection separately deal with each specific component such as energy storage capacity for voltage ripple of sub-module (SM) capacitor, arm inductance for second harmonic circulating current reduction, maximum allowable modulation index for MMC operating condition, which considered only a single purpose. However, the parameters respond dynamically to their characteristics and interact directly with the MMC performance, power system conditions, and specific requirements. In this study, we investigate the mutual relationships between the parameters and their performance. Then, we determine the parameter values based on a proposed systematic design procedure with the desired objectives and restricted conditions, which could be cumbersome and time-consuming to approach proper and acceptable parameter values. Therefore, this study could provide engineering evaluations and insights to help MMC-HVDC system engineers and project developers in intuitive approaches regarding the design aspects of the technology requirement challenges. The efficacy and accuracy of the analysis and design method for the MMC-HVDC system parameters were validated by PSCAD/EMTDC time-domain simulation and real-time digital simulation with hardware-in-loop system.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2020.3018597