中国电力2025，Vol.58Issue(9)：44-53,67,11.DOI:10.11930/j.issn.1004-9649.202502048
基于有源谐波电阻控制的下垂控制变流器振荡抑制策略
Oscillation Suppression Strategy for Droop Control Converter Based on Active Harmonic Resistance Control
摘要
Abstract
The droop control converter exhibits capacitive characteristics in the frequency band below 50 Hz,which leads to the problem of RLC oscillation when it interacts with the inductive power grid,thus causing harm to the power grid.Based on this,this paper firstly establishes a sequence impedance model of droop control converter using the harmonic linearization method,which reveals the mechanism of oscillation after the interaction between the droop control converter and the power grid.Then,a control strategy for active harmonic resistance based on droop control converter is proposed,which only requires modifying the voltage loop command of the converter to shape the impedance characteristics(excluding the fundamental frequency)into resistive behavior,thereby avoiding oscillations when interacting with an inductive grid.To address the possible influence of active harmonic resistance on the stability of the system,an adaptive control strategy is proposed to adjust the parameter value,thus ensuring consistent suppression of system oscillation.Finally,simulation and hardware-in-the-loop(HIL)experiments validate the effectiveness of the active harmonic resistance control strategy.关键词
下垂控制变流器/序阻抗建模/稳定性分析/有源谐波电阻/自适应控制Key words
droop control converter/sequence impedance modeling/stability analysis/active harmonic resistor/adaptive control引用本文复制引用
胡雪凯,孟良,李磊,杨洋,殷一林,雷万钧..基于有源谐波电阻控制的下垂控制变流器振荡抑制策略[J].中国电力,2025,58(9):44-53,67,11.基金项目
国家电网有限公司科技项目(高比例新能源电力电子装置支撑构网及稳定性分析关键技术研究,kj2023-017). This work is supported by Science and Technology Project of SGCC(Research on the Key Technologies of Support Network and Stability Analysis of High Proportion New Energy Power Electronic Devices,No.kj2023-017). （高比例新能源电力电子装置支撑构网及稳定性分析关键技术研究,kj2023-017）
