NDLI: Power Quality Management Strategy for High-Speed Railway Traction Power Supply System Based on MMC-RPC

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Power Quality Management Strategy for High-Speed Railway Traction Power Supply System Based on MMC-RPC

Content Provider	MDPI
Author	Li, Teng Shi, Yongbin
Copyright Year	2022
Description	This paper adopts the Modular Multilevel Converter Type Railway Power Conditioner (MMC-RPC) equipment to effectively manage the power quality of the high-speed railway traction power supply system including the reactive power and negative sequence component. Firstly, the single-phase model of the MMC was established to deduce the working characteristics of the MMC-RPC and its compensation principle for the traction power supply system with the v/v wiring transformer. Secondly, the adaptive VSG control strategy was adopted for the inverter of the MMC-RPC to provide dynamic inertial and damping support for the traction power supply system based on the virtual synchronous generator (VSG) control. Compared with the traditional double closed-loop (DCL) and VSG controls, it has better anti-disturbance and dynamic performance. The root locus analysis of control parameters based on a small signal model shows that VSG control can provide more stability margin. Furthermore, Differential Flatness Control (DFC) was used in the inner-loop controller to ensure the stable control of the inverter and the stability was verified by the Lyapunov stability analysis. For the rectifier of the MMC-RPC, a hierarchical three-level control strategy with system-level control, cluster-group voltage control, and inter-cluster voltage control for keeping the voltage balance was adopted. Finally, simulation results on the Matlab/Simulink platform verified the effectiveness and stability of the joint control applied in the MMC-RPC.
Starting Page	5205
e-ISSN	19961073
DOI	10.3390/en15145205
Journal	Energies
Issue Number	14
Volume Number	15
Language	English
Publisher	MDPI
Publisher Date	2022-07-18
Access Restriction	Open
Subject Keyword	Energies Industrial Engineering Modular Multilevel Converter Railway Power Conditioner Traction Power Supply System Adaptive Virtual Synchronous Generator
Content Type	Text
Resource Type	Article

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