A New Online Power Reversal Strategy for LCC-HVDC Systems Utilizing Round Power Mode

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

IEEE Transactions on Power Delivery Pub Date : 2024-09-03 DOI:10.1109/TPWRD.2024.3454116

Meng Chen;Ying Xue;Waisheng Zheng;Yiping Chen;Nan Chen;Conghuan Yang;Zhixuan Li

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引用次数: 0

Abstract

Achieving higher renewable penetration in power systems requires more operational flexibility due to the variability of renewable energy sources. LCC-HVDC systems, boasting the largest installed capacity among existing HVDC technologies, hold tremendous potential to offer grid flexibility through their strong power control capabilities. However, LCC-HVDC systems suffer from the inherent issue of uncontrollability at low power levels, fundamentally limiting their application in providing the much-needed grid flexibility. To address this issue, this paper proposes a new online power reversal strategy for LCC-HVDC based on round power mode (RPM). The proposed strategy can achieve continuous control at low power levels and unlock the full flexibility of LCC-HVDC. Then the detailed modelling of the proposed strategy including power reversal process, mode-switching methods and coordinated operation of bipolar units are presented in this paper. The simulation results using PSCAD/EMTDC demonstrate the performance of the proposed strategy across all power levels.

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利用循环功率模式的新型 LCC-HVDC 系统在线功率反转策略

由于可再生能源的多变性，要提高电力系统中的可再生能源渗透率，就必须提高运行灵活性。LCC-HVDC 系统是现有 HVDC 技术中装机容量最大的系统，其强大的功率控制能力为提供电网灵活性提供了巨大的潜力。然而，LCC-HVDC 系统本身存在低功率水平不可控的问题，从根本上限制了其在提供急需的电网灵活性方面的应用。为解决这一问题，本文提出了一种基于轮功率模式（RPM）的 LCC-HVDC 在线功率反转新策略。该策略可在低功率水平下实现连续控制，充分释放 LCC-HVDC 的灵活性。随后，本文介绍了拟议策略的详细建模，包括功率反转过程、模式切换方法和双极单元的协调运行。使用 PSCAD/EMTDC 得出的仿真结果证明了所提策略在所有功率等级下的性能。

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.