基于DFIG-MBSDC参数多步优化及约束边界调整的电力系统低频振荡抑制  

POWER SYSTEM LOW-FREQUENCY OSCILLATION DAMPING BASED ON MULTI-STEP OPTIMIZATION AND CONSTRAINT BOUNDARY ADJUSTMENT OF DFIG-MBSDC PARAMETERS

作　　者：李生虎[1,2] 汪壮 Li Shenghu;Wang Zhuang(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China;Anhui Province Key Laboratory of Renewable Power Utilization and Energy Conservation,Hefei 230009,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009 [2]新能源利用与节能安徽省重点实验室,合肥230009

出　　处：《太阳能学报》2025年第4期530-540,共11页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51877061)。

摘　　要：在双馈感应发电机(DFIG)上安装多通道附加阻尼控制器(MBSDC),可抑制电网多个低频振荡(LFO)模式,但控制效果与其控制参数有关。基于特征值灵敏度的单步优化算法存在截断误差,优化后危险模式和关键参数可能变化,因此不能确保抑制效果。该文在DFIG并网系统小扰动稳定模型基础上,基于模式危险程度,提出LFO模式相对灵敏度加权方法,确定MBSDC关键控制参数。提出MBSDC参数多步优化模型及优化目标对约束边界灵敏度,以调整MBSDC参数,改善阻尼效果。基于小/大扰动仿真分析,验证所提DFIG-MBSDC参数多步优化模型及约束边界调整方法的振荡抑制效果。With the multi-band supplementary damping controller(MBSDC)at doubly-fed induction generator(DFIG),multiple lowfrequency oscillation(LFO)modes in the power system may be damped,but the control effect is related to the MBSDC’s parameters.The single-step optimization based on the eigen-sensitivity has the truncation error,and the critical modes and the key parameters may change after optimization,thus the control effect can not be guaranteed.In this paper,the small-disturbance stability model of power system with DFIGs is derived.The severity degree of the critical modes is applied to weight the relative sensitivity of the LFO modes and find the critical parameters of the MBSDC.A multi-step optimization model for parameter optimization is proposed.The sensitivity model of the objective function with respect to the limits of the constraints is proposed to adjust the control parameters and improve the damping effect.The simulation results with small/large disturbances are provided to verify the damping effect of the proposed multi-step optimization model and the constraint boundary adjustment methods for the DFIG-MBSDC.

关 键 词：风电 灵敏度分析 优化 低频振荡 多通道附加阻尼控制器 约束边界调整 

分 类 号：TM712[电气工程—电力系统及自动化]