考虑同步机制的双馈风电系统小扰动建模与稳定性分析

对比分析了锁相环同步机制和虚拟同步发电机同步机制下的双馈风电系统小扰动稳定性及动态特性。针对2种同步机制下的双馈风电系统，基于数学方程分别得出相应的小扰动模型，进而利用特征值分析法对系统小扰动稳定性进行研究。在StarSim硬件在环(StarSim-HIL)半实物仿真平台上搭建相关模型，通过仿真对2种同步机制下的双馈风电系统有功支撑等动态特性及小扰动稳定性进行了分析与验证。对2种同步机制的适用性进行总结，指出锁相环型控制虽然动态特性好、响应速度快，但是在弱电网下的小扰动稳定性及有功支撑等方面，虚拟同步发电机控制更有优势。

Small disturbance modeling and stability analysis of doubly-fed wind power system considering synchronization mechanism

The small disturbance stability and dynamic characteristics of doubly-fed wind power system under phase locked loop synchronous mechanism and virtual synchronous generator mechanism are compared and analyzed. For the doubly-fed wind power system with the two synchronization mechanisms, the corresponding small disturbance models are obtained based on the mathematical equations, and then the small disturbance stability of the system is studied by using the eigenvalue analysis method. The relevant models are built on the StarSim-hardware-in-the-loop(StarSim-HIL) semi-physical simulation platform, and the dynamic characteristics of the active support and small disturbance stability of the doubly-fed wind power system under the two synchronization mechanisms are analyzed and verified by simulation. The applicability of the two synchronization mechanisms is summarized, and it is pointed out that the phase locked loop control has good dynamic characteristics and fast response speed, but the virtual synchronous generator control has more advantages in small disturbance stability and active power support under weak power grid.