Work

Negative‐Sequence Component Compensation for Railway Power System With Supercapacitor Integrated MMC

Year: 2025

Type: article

Abstract: ABSTRACT This paper presents a coordinated control strategy for a supercapacitor‐integrated modular multilevel converter (SC‐MMC) to address the negative sequence component in railway traction power systems. The MMC is a single‐phase, four‐bridge‐arm topology with a traction‐side sub‐module connected to a supercapacitor energy storage device. The operating mode is divided based on the negative sequence compensation principle and locomotive load characteristics. The upper level of the strategy determines the operating modes and calculates the reference power of each port, while the lower level achieves power control and coordinates the switching of operating modes. The case study demonstrates that the system can effectively compensate for the negative sequence of the grid under different locomotive load levels and coordinate the control of the supercapacitor and MMC to participate in the compensation.

Source: Electronics Letters

DOI: 10.1049/ell2.70384

Authors: Zhijie Li, Zhongyou Luo, Tianshu Chen, Junyi Tang

Institutions: State Grid Corporation of China (China), Southwest Jiaotong University

Language: English

Topic: HVDC Systems and Fault Protection

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Industry, innovation and infrastructure, Affordable and clean energy

Open Access status: gold

Estimated APC paid: $2,590