Double-pancake superconducting coil integrated with DFIG-based wind power systems under voltage-dip events: Design and performance analysis study

IF 1.3 3区物理与天体物理 Q4 PHYSICS, APPLIED Physica C-superconductivity and Its Applications Pub Date : 2024-10-29 DOI:10.1016/j.physc.2024.1354601

Garkki B, Revathi S

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Abstract

The doubly fed induction generator (DFIG)-based wind turbine provides massive development in power generation. Uncertain power oscillations and voltage-dip events affect the stability of the DFIG. To mitigate the effect of voltage-dips in short period, superconducting magnetic energy storage (SMES), which possess rapid energy exchange and high power density, is integrated with large-scale renewable power systems. SMES is integrated at the DC link of the DFIG to ensure the power balance and fault ride-through (FRT) capability. During this operation, frequent current changes occur in the high-temperature superconducting (HTS) coil, which leads to an increase in AC losses. As a remedy, an additional power converter structure controlled with a model-predictive controller (MPC) is proposed. Firstly, a scale-down HTS double-pancake coil model is designed using a finite element model by which transport current loss and magnetic field formulation are studied. Additionally, the critical coil current is also verified through experimental studies. The effectiveness of the proposed MPC-based SMES integrated DFIG on DC link voltage and grid current under IEC-61000-4-11 standard, symmetrical and asymmetrical voltage-dip cases are investigated. The obtained results demonstrate that the proposed system effectively reduces transients in DC link voltage and improves the FRT capabilities of the grid.

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电压跌落事件下与基于 DFIG 的风力发电系统集成的双饼超导线圈：设计和性能分析研究

基于双馈异步发电机（DFIG）的风力涡轮机为发电带来了巨大的发展。为缓解短时电压跌落的影响，具有快速能量交换和高功率密度的超导磁储能（SMES）被集成到大型可再生能源发电系统中。在 DFIG 的直流链路上集成 SMES，可确保功率平衡和故障穿越（FRT）能力。在运行过程中，高温超导（HTS）线圈会发生频繁的电流变化，从而导致交流损耗增加。作为补救措施，我们提出了一种采用模型预测控制器（MPC）控制的附加功率转换器结构。首先，使用有限元模型设计了一个缩小的 HTS 双薄饼线圈模型，通过该模型研究了传输电流损耗和磁场配方。此外，还通过实验研究验证了临界线圈电流。在 IEC-61000-4-11 标准、对称和非对称电压跌落情况下，研究了所提出的基于 MPC 的 SMES 集成 DFIG 对直流链路电压和电网电流的影响。结果表明，所提议的系统可有效降低直流链路电压的瞬态，并提高电网的故障穿越能力。

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来源期刊

Physica C-superconductivity and Its Applications 物理-物理：应用

CiteScore

2.70

自引率

11.80%

发文量

102

审稿时长

66 days

期刊介绍： Physica C (Superconductivity and its Applications) publishes peer-reviewed papers on novel developments in the field of superconductivity. Topics include discovery of new superconducting materials and elucidation of their mechanisms, physics of vortex matter, enhancement of critical properties of superconductors, identification of novel properties and processing methods that improve their performance and promote new routes to applications of superconductivity. The main goal of the journal is to publish: 1. Papers that substantially increase the understanding of the fundamental aspects and mechanisms of superconductivity and vortex matter through theoretical and experimental methods. 2. Papers that report on novel physical properties and processing of materials that substantially enhance their critical performance. 3. Papers that promote new or improved routes to applications of superconductivity and/or superconducting materials, and proof-of-concept novel proto-type superconducting devices. The editors of the journal will select papers that are well written and based on thorough research that provide truly novel insights.