VSG全系统状态空间建模及稳定性分析

VSG Whole System State Space Modeling and Stability Analysis

虚拟同步发电机(VSG)控制技术中如控制延时、转动惯量以及阻尼系数等重要参数严重影响了系统的稳定性。为分析系统中部分重要参数对逆变器全局稳定性产生的影响,研究了一种基于状态空间建模和灵敏度分析的逆变器稳定性分析方法,并借助特征值和灵敏度分析,评估系统中控制延时、转动惯量和阻尼系数等重要参数对系统全局稳定性的影响。通过仿真验证了理论分析的正确性,所推导的状态空间建模及灵敏度分析方法可以作为系统参数设计时的理论参考依据。

In the virtual synchronous generator (VSG) control technology,some significant parameters could impact the system stability,such as control delay,a moment of inertia,and damping coefficient.This paper proposed an inverter stability analysis method based on state-space modeling and sensitivity analysis to analyze the influence of some key parameters on the global stability of the inverter.It evaluated the influence of parameters,such as control delay,the moment of inertia,and damping coefficient,on the global stability of the system by employing the analysis of characteristic value and sensitivity.The simulation experiment verifies the correctness of the theoretical analysis.The proposed derived state-space modeling and sensitivity analysis method could be a system parameter design reference.