电网技术2023，Vol.47Issue(12)：4897-4905,9.DOI:10.13335/j.1000-3673.pst.2023.1374
考虑转子磁链-电流环控制动态的虚拟惯量DFIG功频响应特性建模
Active Power-frequency Response Modeling of Doubly-fed Induction Generator With Virtual Inertia Control Considering Rotor Flux-current Loop Control Dynamics
摘要
Abstract
The frequency response characteristics of a doubly-fed induction generator(DF1G)with virtual inertia control are influenced by various factors,including the wind turbines and their control elements.An active power-frequency response model for the DFIG considering the dynamics of rotor magnetic flux and current loop is proposed in this paper.Firstly,this paper investigates the operational characteristics of DFIG with virtual inertia control when subjected to disturbances.Utilizing the small signal linearization technique,the state equations are formulated for the wind turbine,the asynchronous generator,the shaft system,the rotor-side power loop control,and the current loop control.Then,the linearized equations for the rotor magnetic flux-current loop are simplified based on the principle of stator flux orientation.Using the state equations,a five-order closed-loop transfer function for the wind turbine system is derived,accounting for the influence of rotor magnetic flux and current loop control.The impact of the current loop on the rotor magnetic flux frequency response is quantified through a frequency domain analysis.Furthermore,a comparative analysis is performed between the proposed model and the existing simplified models,and the perturbation theory is employed to analyze the effects of current loop control parameters on the active power-frequency response of the proposed model.Finally,the high response accuracy and strong applicability of the proposed model are demonstrated through the comparative time-domain simulations on the five-node test system with DFIG and an actual power system example.关键词
双馈风电/小信号模型/转子磁链/电流环/虚拟惯量/控制参数Key words
doubly-fed induction generator/small-signal model/rotor magnetic flux/current control loop/virtual inertia/control parameters分类
信息技术与安全科学引用本文复制引用
李国庆,刘先超,姜涛,王长江..考虑转子磁链-电流环控制动态的虚拟惯量DFIG功频响应特性建模[J].电网技术,2023,47(12):4897-4905,9.基金项目
国家电网公司科技项目(5108-202299258A-1-0-ZB).Project Supported by the Science and Technology Project of State Grid Corporation of China(No.5108-202299258A-1-0-ZB). （5108-202299258A-1-0-ZB）
