电力系统自动化2025，Vol.49Issue(22)：90-100,11.DOI:10.7500/AEPS20241206002
适应跟网/构网混联系统强度评估的构网型设备等值建模方法
Equivalent Modeling Method for Grid-forming Devices for Strength Assessment of Grid-following/Grid-forming Hybrid Systems
摘要
Abstract
Grid-forming(GFM)devices,with their voltage/frequency active support capabilities,are driving the evolution of power systems toward a typical hybrid system structure.However,due to the multiple control links and high model orders of GFM devices,as well as their complex dynamic interaction with grid-following(GFL)devices,the reasonable representation and reduced-order modeling of their dynamic characteristics face challenges,which restrict the accuracy of system strength quantitative evaluation.Focusing on the problem of small-signal synchronous stability from the perspective of system phase-angle strength,an equivalent modeling method for GFM devices that takes into account the dynamic interaction between GFM and GFL devices is proposed.First,a phase-angle loop incorporating dynamic interactions between two types of devices is constructed.The synchronization stability conditions of the hybrid system are analyzed based on the complex torque coefficient method and the positive net damping criterion.Furthermore,GFM devices are reduced to an ideal voltage source with equivalent series impedance,whose equivalent impedance parameters and positive net damping coefficients can jointly characterize the voltage source characteristics of GFM devices and their contributions to system strength,and support the quantitative evaluation of system strength based on short-circuit ratio(SCR)indicators.The proposed method can be implemented on a black-box model and is suitable for various GFM control strategies with inner loops.Finally,the effectiveness of the method is verified through simulation,and the influence of different control parameters on the equivalent modeling results is analyzed.关键词
混联系统/系统强度/量化评估/构网型设备/跟网型设备/等值建模Key words
hybrid system/system strength/quantitative evaluation/grid-forming device/grid-following device/equivalent modelling引用本文复制引用
侯智贤,李勇,王晶,马富艺龙,韦徵,辛焕海..适应跟网/构网混联系统强度评估的构网型设备等值建模方法[J].电力系统自动化,2025,49(22):90-100,11.基金项目
国家电网有限公司总部科技项目(4000-202440367A-3-1-DG). This work is supported by State Grid Corporation of China(No.4000-202440367A-3-1-DG). （4000-202440367A-3-1-DG）
