Modular Multi-Level Converter Model for the Analysis, the Design and the Optimization of DC Power Systems Involving Superconducting Power Cables Cooled by Liquid Hydrogen

IF 1.8 3区物理与天体物理 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-18 DOI:10.1109/TASC.2025.3542742

E. Guerra;M. Simonazzi;F. Mimmi;A. Morandi;M. Bocchi;A. Musso;G. Angeli;L. Martini;A. Bertinato;P. Steckler;C. Creusot

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Abstract

DC power transmission technologies have achieved significant advancements, gaining widespread adoption within modern electrical systems. The use of superconducting cables in Magnesium Diboride (MgB₂) cooled by liquid hydrogen (LH2) could drastically increase the performance of DC grids, enabling higher power transport capacity and extending transmission distance, while reducing energy loss and land occupation. Today, the transport of DC electrical energy is enabled through modular muti-level converters (MMCs) capable of effectively controlling currents, voltages and power flow. Designing an optimal DC power system, along with appropriate superconducting cable design and protection apparatus, needs accurate, yet simplified, models of the converters. This study presents simplified models that apply during the fault, able to adapt to any pre-fault scenario without a need to implement complex control systems. The developed model can be easily integrated, along with a model of a superconducting MgB₂ cable, in EMT power system simulators for analysing their mutual interaction during faults and for optimizing the cable design and its protection system.

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用于液氢冷却超导电缆直流电力系统分析、设计和优化的模块化多级变换器模型

直流输电技术取得了重大进展，在现代电力系统中得到了广泛的应用。在液氢（LH2）冷却的二硼化镁（MgB2）中使用超导电缆可以大大提高直流电网的性能，实现更高的电力传输容量和延长传输距离，同时减少能量损失和占用土地。今天，直流电能的传输是通过能够有效控制电流、电压和功率流的模块化多电平转换器（mmc）实现的。设计一个最优的直流电力系统，以及合适的超导电缆设计和保护装置，需要准确而又简化的变流器模型。该研究提出了在故障期间应用的简化模型，能够适应任何故障前场景，而无需实施复杂的控制系统。该模型可以与超导MgB2电缆模型集成在EMT电力系统模拟器中，用于分析故障时电缆的相互作用，并优化电缆设计及其保护系统。

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来源期刊

IEEE Transactions on Applied Superconductivity 工程技术-工程：电子与电气

CiteScore

3.50

自引率

33.30%

发文量

650

审稿时长

2.3 months

期刊介绍： IEEE Transactions on Applied Superconductivity (TAS) contains articles on the applications of superconductivity and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Large scale applications include magnets for power applications such as motors and generators, for magnetic resonance, for accelerators, and cable applications such as power transmission.