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柔性直流输电系统高频谐振自适应抑制策略

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近些年柔性直流在高频范围引起的振荡稳定问题日益频繁,已经对电力系统的安全稳定运行造成了影响.由于实际系统的网络拓扑与运行方式复杂多变,因此柔性直流高频带宽内的谐振特性复杂,给柔性直流高频谐振的抑制带来了挑战.为提升高频谐振抑制策略在系统多运行方式情况下的适应性,首先对系统的阻抗特性进行了建模研究,然后分析了不同抑制策略的缺陷,基于以上研究提出了基于自适应带阻滤波器的高频谐振抑制策略.该策略通过调节附加带阻滤波器的数量及参数,有效解决了交流系统不同运行方式下高频谐振频率多变问题,具有较强的适应性,最后通过PSCAD电磁暂态仿真验证了所提抑制策略的有效性.
Adaptive Suppression Strategy of High Frequency Resonance in MMC-HVDC Transmission System
Recently,the high frequency resonance problems of modular multilevel converter based high voltage direct current(MMC-HVDC)take place frequently,which have seriously threatened the stability of power systems.As the actual system network topology and operation modes change frequently,the high frequency resonance characteristics with the high frequency bandwidth of MMC-HVDC are complex,which bring challenges to the suppression of the high frequency resonance of MMC-HVDC.In order to improve performance of the suppression strategy of high frequency resonance in the case of multiple operating modes,firstly,the impedance characteristics of the system are established.Then the defects of different suppression strategies are analyzed.Based on the above research,a high frequency resonance suppression strategy based on an adaptive band-stop filter is proposed in this paper.By adjust-ing the number and parameters of additional band-stop filters,the strategy effectively solves the variable problem of high frequency resonance under different operation modes of AC power system and has strong adaptability.Finally,the effectiveness of the proposed suppression strategy is verified through PSCAD electromagnetic transient simulations.

modular multilevel converter based high voltage direct current(MMC-HVDC)impedance analysis methodhigh frequency resonancesuppression strategyadaptive band-stop filter

王延纬、刘宇明、杨荣照、钟明明、林建熙、付超、易杨、秦颖婕、周保荣

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广东电网有限责任公司电力调度控制中心,广州 510600

南方电网科学研究院,广州 510663

柔性直流输电 阻抗分析法 高频谐振 抑制策略 自适应带阻滤波器

国家自然科学基金集成项目中国南方电网有限责任公司科技项目

U22B600010GDKJXM20201967

2024

10.13648/j.cnki.issn1674-0629.2024.02.001

南方电网技术
南方电网科学研究所有限责任公司

南方电网技术

CSTPCD北大核心
影响因子：1.42
ISSN：1674-0629
年,卷(期)：2024.18(2)
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