高压电器2025，Vol.61Issue(11)：118-128,11.DOI:10.13296/j.1001-1609.hva.2025.11.011
异构变流器并联系统全频段振荡抑制策略研究
Research on Full-band Oscillation Suppression Strategy for Hybrid Grid-forming/Grid-following Converter Systems
摘要
Abstract
In view of the persistent oscillation risk in hybrid grid-forming and grid-following converter systems(het-erogeneous converter systems),in this study the impedance models for both converter types using harmonic lineariza-tion theory are set up firstly,followed by a comparative analysis of their impedance characteristic difference under re-spective control strategies.Then,a coordinated suppression strategy is implemented through cascaded second-order low-pass filters in grid-following voltage feedforward paths combined with adaptive damping in grid-forming control to effectively mitigate full band oscillations in the heterogeneous system.Compared to the uncompensated system without collaborative suppression strategy,the approach significantly enhances stability margins while ensuring the grid-to-converter impedance ratio to meet the Nyquist stability criterion,thereby reducing oscillation occurrence probability.Finally,the effectiveness of the proposed suppression strategy is varified through a hardware-in-the-loop simulation platform for heterogeneous converter systems.关键词
新能源场站/异构变流器/全频段/阻抗模型/协同抑制策略Key words
renewable power plant/heterogeneous converters/full-band/impedance model/collaborative sup-pression strategy引用本文复制引用
文天舒,张纯江,张恺轩,伍阳阳,沐润志,赵宏..异构变流器并联系统全频段振荡抑制策略研究[J].高压电器,2025,61(11):118-128,11.基金项目
国家自然科学基金资助项目(51877187) （51877187）
云南省新型电力系统技术创新中心资助项目(202405AK340007). Project Supported by National Natural Science Foundation of China(51877187),Yunnan Province New Power System Technology Innovation Center(202405AK340007). （202405AK340007）
