MMC parameter selection and stability control for flexible direct transmission converter station of energy storage power station

IF 2.6 4区 工程技术 Q3 ENERGY & FUELS Frontiers in Energy Research Pub Date : 2024-09-06 DOI:10.3389/fenrg.2024.1445383
Ji Xiaotong, Jiang Kezheng, Wang Chenyu, Ye Chang, Liu Dan
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Abstract

With the continuous advancement of science and technology, there is a growing global focus on new energy sources. Despite the rapid progress of offshore wind power generation systems, they are still plagued by issues such as significant transmission loss, limited transmission distance, and low-frequency oscillation, which hinder further development. To address these challenges, the Flexible Direct Current Transmission System (VSC-HVDC) has emerged as a widely studied solution. The integration of energy storage power stations presents new opportunities for enhancing offshore wind power transmission systems. These power stations not only serve as energy buffer pools to reduce transmission loss but also improve transmission efficiency through intelligent regulation and control, effectively mitigating low-frequency oscillation. This article introduces an optimization control parameter design method based on sensitivity analysis to enhance the stability of MTDC based on MMC. It outlines the topology structure of the offshore VSC-HVDC system, covering the main circuit and control system. Additionally, the article delves into the derivation of the small signal stability model of the system and investigates the selection of control parameters based on the eigenvalue objective function. Lastly, it analyzes the impact of the control system on the stability of the wind power flexible direct output converter station, highlighting the significant influence of control system parameters on the small signal stability of MTDC systems based on MMC. The MMC parameter selection strategy proposed in this paper is shown to effectively enhance system stability.
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储能电站柔性直流换流站的 MMC 参数选择与稳定性控制
随着科学技术的不断进步,全球对新能源的关注度越来越高。尽管海上风力发电系统发展迅速,但仍存在传输损耗大、传输距离有限、低频振荡等问题,阻碍了其进一步发展。为应对这些挑战,柔性直流输电系统(VSC-HVDC)已成为一种被广泛研究的解决方案。储能电站的集成为加强海上风电传输系统提供了新的机遇。这些电站不仅可以作为能量缓冲池,减少输电损耗,还能通过智能调节和控制提高输电效率,有效缓解低频振荡。本文介绍了一种基于灵敏度分析的优化控制参数设计方法,以增强基于 MMC 的 MTDC 的稳定性。文章概述了海上 VSC-HVDC 系统的拓扑结构,包括主电路和控制系统。此外,文章还深入探讨了系统小信号稳定性模型的推导,并研究了基于特征值目标函数的控制参数选择。最后,文章分析了控制系统对风电柔性直接输出换流站稳定性的影响,强调了控制系统参数对基于 MMC 的 MTDC 系统小信号稳定性的重要影响。结果表明,本文提出的 MMC 参数选择策略能有效提高系统稳定性。
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
Frontiers in Energy Research
Frontiers in Energy Research Economics, Econometrics and Finance-Economics and Econometrics
CiteScore
3.90
自引率
11.80%
发文量
1727
审稿时长
12 weeks
期刊介绍: Frontiers in Energy Research makes use of the unique Frontiers platform for open-access publishing and research networking for scientists, which provides an equal opportunity to seek, share and create knowledge. The mission of Frontiers is to place publishing back in the hands of working scientists and to promote an interactive, fair, and efficient review process. Articles are peer-reviewed according to the Frontiers review guidelines, which evaluate manuscripts on objective editorial criteria
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