Fast Simulation of MMC-HVDC Systems Using A Generalized Equivalent Circuit Model of MMC

Zhao, Ligang; Xu, Guangyue; Cao, Hong; Huang, Guanbiao; Shi, Di; Zhou, Tao; Zhen, Hongyue; Wu, Xuegang; Jing, Chaoyang

doi:10.1109/icca51439.2020.9264378

Cited by 5 publications

(2 citation statements)

References 14 publications

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“…The transfer functions of inner current and outer voltage loops are expressed in Equations ( 17) and (18). For the voltage loop, the hypothesis is that the current loop gain is equal to one when the sizing is made.…”

Section: Study Of the Catenary-side Invertermentioning

confidence: 99%

“…All of these architectures are connected to transformers that are bulky and non-controllable, and can have magnetization issues and other complications [11,12]. This is where modular multilevel converters (MMC) become interesting: due to their versatility, they have a wide range of applications, such as speed drives [13][14][15], DC transmission lines [16][17][18][19], power conditioning (thanks to static compensators) [20][21][22][23] and battery energy storage systems [24,25]. Power conditioning can also be achieved with direct powering of the load to be compensated, thus MMCs can be used to power electric arc furnaces [26,27] that are particularly difficult loads to model [28,29], which makes tuning the control more difficult than for conventional loads.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of a 25 kV–50 Hz Railway-Substation Power Supply Based on a Back-to-Back Modular Multilevel Converter Topology

Tournoux,

Houari,

Benkhoris

et al. 2024

Energies

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This paper presents a preliminary study of a 25 kV–50 Hz railway substation power supply system. The control of a back-to-back converter based on modular multilevel converter (MMC) technology was investigated to fit with the power quality requirements of the application. One of the main challenges is the presence of constraining load conditions, under which the train circulation variability, low-frequency harmonics and critical power transients can notably decrease the power quality and lead to instability. In order to address this, cascaded controllers based on resonant controllers are proposed to ensure the desired performance. Furthermore, balancing voltage algorithms are added to avoid stress phenomena and additional losses in the studied power conversion interface. The paper presents the design of the control stages and demonstrates the robust performance of the system using a realistic loading condition of a railway substation.

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Section: Study Of the Catenary-side Invertermentioning

confidence: 99%