电力系统保护与控制2025，Vol.53Issue(20)：106-119,14.DOI:10.19783/j.cnki.pspc.241744
采用匹配控制的构网型光伏并网小扰动稳定性及参数域分析
Small-signal stability and parameter regions analysis of grid-forming PV systems based on matching control
摘要
Abstract
In recent years,grid-forming control has gradually emerged as an effective approach to enhance the stability of power systems with high renewable energy penetration.However,there exist potential oscillation risks due to inappropriate control parameter settings under different AC grid conditions.To address this issue,a grid-forming PV control strategy based on matching control is proposed,and the small-signal stability mechanism and parameter stability region are studied from a synchronization perspective.First,a transfer function model of the grid-forming PV system is established using the component connection method,and the propagation path of small-signal disturbances is qualitatively analyzed.Then,the dynamic interactions within the system are analyzed based on the synchronization dominant loop to reveal the instability mechanism caused by the mismatch between the control parameters and the equivalent AC grid impedance.On this basis,a small-signal stability index based on the equivalent loop gain is proposed to quantitatively evaluate the impact of various factors on system stability and to determine the stability regions of key control parameters.These results show that a reduction in grid impedance narrows the stability region of the matching control parameters while widening that of the voltage control parameters.Finally,the correctness of the theoretical analysis is verified by time-domain simulations and the control hardware-in-the-loop tests.关键词
构网型光伏/匹配控制/小扰动稳定性/等效环路增益/参数稳定域Key words
grid-forming PV/matching control/small-signal stability/equivalent loop gain/parameters stability region引用本文复制引用
李爽,汪海蛟,黄越辉,何国庆,王伟胜..采用匹配控制的构网型光伏并网小扰动稳定性及参数域分析[J].电力系统保护与控制,2025,53(20):106-119,14.基金项目
This work is supported by the Science and Technology Project of the Headquarters of State Grid Corporation of China(No.4000-202332455A-3-2-ZN). 国家电网公司总部科技项目资助(4000-202332455A-3-2-ZN) （No.4000-202332455A-3-2-ZN）
