电力系统自动化2024，Vol.48Issue(4)：150-159,10.DOI:10.7500/AEPS20230627009
不同控制策略下直驱风电机组的机网耦合特性及稳定性分析
Analysis of Generator-Grid Coupling Characteristics and Stability for Direct-drive Wind Turbines with Different Control Strategies
摘要
Abstract
The interaction between the direct-drive wind turbines and the weak AC grid or flexible DC transmission system will easily lead to wideband oscillation events.It is generally believed that the interaction characteristics between direct-drive wind turbines and AC/DC power grids mainly depend on the grid-side converters,so the dynamics of the generator-side system of direct-drive wind turbines are usually ignored.There have been some literatures discussing the influence of the generator-side system under traditional vector control on the grid-connected characteristics of direct-drive wind turbines,but there is a lack of relevant research on the generator-grid coupling characteristics for direct-drive wind turbines with different control strategies.In this paper,the generator-grid coupling characteristics of direct-drive wind turbines with four typical control strategies are compared.First,the detailed impedance models of direct-drive wind turbines with different control strategies are derived and verified.Then,based on the generator-grid coupling degree index,the generator-grid coupling characteristics of direct-drive wind turbines are compared and analyzed,and the influence of generator-side system dynamics on AC impedance characteristics and grid-connected stability of direct-drive wind turbines with different control strategies is obtained.Finally,the correctness of the theoretical analysis is verified by the case analysis of direct-drive wind turbines connecting to weak AC power grid.关键词
直驱风电机组/机网耦合/矢量控制/虚拟同步机/惯性自同步控制/阻抗/稳定性Key words
direct-drive wind turbine/generator-grid coupling/vector control/virtual synchronous generator/inertia synchronization control/impedance/stability引用本文复制引用
饶仪明,吕敬,戴金水,王晗,蔡旭..不同控制策略下直驱风电机组的机网耦合特性及稳定性分析[J].电力系统自动化,2024,48(4):150-159,10.基金项目
国家自然科学基金资助项目(52277195). This work is supported by National Natural Science Foundation of China(No.52277195). （52277195）
