南方电网技术2026，Vol.20Issue(1)：3-11,23,10.DOI:10.13648/j.cnki.issn1674-0629.2026.01.001
宽频振荡机理及其基于C型阻尼滤波器的抑制技术
Broadband Oscillation Mechanism and Its Suppression Technology Based on C-Type Damping Filter
摘要
Abstract
The mechanisms of broadband oscillations in renewable energy power systems and their suppression technologies are discussed.Starting from the dilemma faced in analyzing AC grid resonance stability based on impedance models,it is demonstrated that the"negative resistance"mechanism of broadband oscillations is untenable.A general method is proposed to describe power electronic devices using broadband voltage source converter models and broadband current source converter models,thereby representing the nonlinear characteristics of power electronic devices with harmonic voltage sources and harmonic current sources.This enables renewable energy power systems to still be described as linear systems,and interprets the mechanism of broadband oscil-lations as a"harmonic amplification"phenomenon caused by network resonance,thus establishing a new framework for explaining the mechanisms of broadband oscillations in renewable energy power systems.Through analysis of two basic resonant circuits,the relationship between resonant mode damping ratio and harmonic amplification factor is derived,laying the theoretical foundation for analyzing and suppressing broadband oscillations based on the s-domain nodal admittance matrix method and C-type damping filters.Based on the maximum damping criterion,a design method for C-type damping filters is proposed,and the designed C-type damping filters exhibit strong broadband damping effects.关键词
宽频振荡/负电阻机理/宽频带换流器模型/谐振模态阻尼比/C型阻尼滤波器/s域节点导纳矩阵法Key words
broadband oscillation/negative resistance mechanism/broadband converter model/resonance mode damping ratio/C-type damping filter/s-domain nodal admittance matrix method分类
信息技术与安全科学引用本文复制引用
徐政..宽频振荡机理及其基于C型阻尼滤波器的抑制技术[J].南方电网技术,2026,20(1):3-11,23,10.基金项目
国家电网有限公司科技项目(5200-202356483A-3-2-ZN).Supported by the Science and Technology Project of State Grid Corporation of China(5200-202356483A-3-2-ZN). （5200-202356483A-3-2-ZN）
