Cost-Efficient Hybrid Converter for Large-Scale Offshore Wind Power Transmission

IF 3.8 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Power Delivery Pub Date : 2025-04-03 DOI:10.1109/TPWRD.2025.3557586

Huichen Gan;Huangqing Xiao;Ying Huang;Lidong Zhang

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引用次数: 0

Abstract

As offshore wind farms increase in scale and distance, it is crucial to identify more economical and reliable converter technologies for far-offshore wind power (OWP) high voltage direct current transmission system. In this paper, a cost-efficient hybrid converter topology is proposed based on the scheme of diode rectifier unit (DRU) and modular multilevel converter (MMC) in parallel. Compared to the DRU and MMC station-parallel scheme, the proposed hybrid converter scheme eliminates the need for the transformer in DRU and ensures that no harmonics pass through the remaining converter transformer. Furthermore, the required sub-module capacitance of the proposed scheme is smaller, which is conducive to lower costs. The mathematical model of the hybrid converter is developed, and based on this model, the working principle, along with the harmonic transfer characteristics is analyzed. An active power coordination control strategy and a harmonic suppression strategy are proposed. The PSCAD/EMTDC results for a 1000 MW-OWP integration system with the hybrid converter verifies the effectiveness of the proposed scheme. Finally, a comparison with existing schemes and a detailed economic analysis are performed to demonstrate the superior advantages of the proposed scheme.

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用于大规模海上风电传输的低成本混合变流器

随着海上风电场规模和距离的增加，为远海风力发电（OWP）高压直流输电系统寻找更经济可靠的变换器技术至关重要。本文提出了一种基于二极管整流单元（DRU）和模块化多电平变换器（MMC）并联的低成本混合变换器拓扑结构。与DRU和MMC站并联方案相比，本文提出的混合变换器方案消除了DRU中变压器的需要，并保证了谐波不通过剩余的换流变压器。此外，该方案所需的子模块电容更小，有利于降低成本。建立了混合式变换器的数学模型，并在此基础上分析了混合式变换器的工作原理及谐波传递特性。提出了有功功率协调控制策略和谐波抑制策略。对1000 MW-OWP混合变换器集成系统的PSCAD/EMTDC结果验证了该方案的有效性。最后，与现有方案进行了比较，并进行了详细的经济分析，以证明所提出方案的优越性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Power Delivery 工程技术-工程：电子与电气

CiteScore

9.00

自引率

13.60%

发文量

513

审稿时长

6 months

期刊介绍： The scope of the Society embraces planning, research, development, design, application, construction, installation and operation of apparatus, equipment, structures, materials and systems for the safe, reliable and economic generation, transmission, distribution, conversion, measurement and control of electric energy. It includes the developing of engineering standards, the providing of information and instruction to the public and to legislators, as well as technical scientific, literary, educational and other activities that contribute to the electric power discipline or utilize the techniques or products within this discipline.