Work

A Real-Time Performance Assessment Scheme for Half-Bridge Submodules of Modular Multilevel Converters

Year: 2025

Type: article

Abstract: This paper proposes a real-time testing scheme for individual modules of Modular Multi-level Converters (MMCs), which are used in VSC-HVDC systems and high-voltage electric motor drives. In MMCs for voltage-source HVDCs, multiple submodules (SMs) are connected in series to form one arm. For MMCs comprising hundreds of identical submodules connected in series, testing the entire system is highly time-consuming and costly, while the proposed method enables real-time testing of each submodule, thereby significantly reducing overall system development cost and time. This study presents a method for configuring one SM from the series-connected SMs with an external circuit, allowing it to be tested under actual MMC operating conditions. The proposed method is comprehensively validated via Hardware-in-the-Loop Simulation (HILS), incorporating operability assessments and a real-time implementation of the circuit model to verify its practical applicability.

Source: Electronics

DOI: 10.3390/electronics14224409

Authors: SangJin Hwang, SungWon Lim, DongMyung Lee

Institution: Hongik University

Language: English

Topic: HVDC Systems and Fault Protection

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $2,896