电网技术2025，Vol.49Issue(10)：4028-4037,中插9-中插17,19.DOI:10.13335/j.1000-3673.pst.2025.0585
自适应振荡模态变化的三相并网逆变器宽频振荡抑制方法
Wide-band Oscillation Suppression Method for Three-phase Grid-connected Inverter Based on Adaptive Oscillation Mode Change
摘要
Abstract
At present,the proposed broadband oscillation suppression method based on impedance remodeling is generally only applicable to a certain frequency band.When the grid impedance changes,the dominant frequency and amplitude of the oscillation mode change,and the oscillation can no longer be effectively suppressed.While suppressing the oscillation of the target frequency band,it will affect the impedance characteristics of other frequency bands,thereby increasing the risk of oscillation in those other frequency bands.To address the issues mentioned above,firstly,voltage feedback is introduced into the current inner loop of the three-phase grid-connected inverter,and the channel transfer function is designed to be applicable for realizing impedance remodeling of the inverter over a wider frequency band,thereby enabling multi-band oscillation.Then,a FIR band-pass digital filter without phase offset is designed,and the influence of the filter's discrete sampling frequency on system stability is eliminated based on phase correction.The oscillation suppression channel,composed of an FIR digital filter and a voltage feedback channel,can adjust the frequency band of the reshaping sequence impedance according to changes in grid impedance,without altering the impedance characteristics of other frequency bands.Finally,the effectiveness of the method are verified by simulation.关键词
宽频振荡/动态抑制/电压前馈/阻抗重塑/阻抗建模/相位矫正Key words
broadband oscillation/dynamic inhibition/voltage feed-forward/impedance remodeling/impedance modeling/phase correction分类
信息技术与安全科学引用本文复制引用
见文号,高湛军,刘瑛琳,秦川,张广韬,雷蕾..自适应振荡模态变化的三相并网逆变器宽频振荡抑制方法[J].电网技术,2025,49(10):4028-4037,中插9-中插17,19.基金项目
国家重点研发计划项目:"高惯量储能型同步调相机关键技术与装备"(2023YFB2406800).Project Supported by National Key Research & Development Program of China:"Key Technology and Equipment for High Inertia Energy Storage Synchronous Condenser"(2023YFB2406800). （2023YFB2406800）
