中国电机工程学报2024，Vol.44Issue(22)：8808-8818,中插10,12.DOI:10.13334/j.0258-8013.pcsee.230987
基于虚拟功角功率控制的VSG增强功率解耦策略
Enhanced Power Decoupling Strategy for VSG With Power Control Based on Virtual Power Angle
摘要
Abstract
The adoption of virtual synchronous machines can enhance the system inertia of a"double high"power grid.However,the strong reactive power coupling inherent in the virtual synchronous machines can introduce power steady-state errors,significantly restricting the power transmission capacity of the converter,and potentially leading to system instability.Therefore,this paper conducts a detailed analysis of the power coupling mechanism of the VSG,and identifies the line impedance ratio(R/X)and phase angle(θ)as the two major factors that affect power coupling.The impact of the power coupling on stability is evaluated in this paper.Then,based on the virtual inductance control,a power control strategy based on virtual power angle is proposed,which takes into account both R/X and θ.The virtual power angle value is calculated using theoretical formulas for power loop reshaping,which can eliminate power coupling in multiple scenarios of the VSG,suppress reactive power fluctuations,and evaluate the stability of the system using the amplitude-phase motion equation criterion.Finally,the effectiveness of the proposed decoupling control strategy is validated through theoretical analysis and experimental results.关键词
虚拟同步机/功率解耦/幅相运动方程/虚拟电感/虚拟功角Key words
virtual synchronous generator/power decoupling/magnitude-phase motion equation/virtual inductance/virtual power angle分类
信息技术与安全科学引用本文复制引用
杜建鹏,赵晋斌,曾志伟,毛玲,屈克庆..基于虚拟功角功率控制的VSG增强功率解耦策略[J].中国电机工程学报,2024,44(22):8808-8818,中插10,12.基金项目
国家自然科学基金项目(52177184). Project Supported by National Natural Science Foundation of China(52177184). （52177184）
