大型失速型风力发电机动态特性研究

通过分析主动失速型机组的来流风速、气动、机械传动与发电机等部件的机理,建立了机组各主要部件的子系统模型(如气动模型、传动模型、发电机暂态模型、补偿电容模型、电网模型和控制系统模型等),近而得到了全系统的动态非线性模型。通过对机组全系统动态机理模型的数字仿真,得到机组在特定来流工况条件下的动态特性。所建立的模型和仿真结果为今后研究风电场与电网之间的相互影响提供了理论基础。

DYNAMIC CHARACTERISTICS OF LARGE-SCALE STALL WIND TURBINE SYSTEM

The stall wind turbines are the main units installed in wind farms in Chinese.The theoretical model and dy- namic performance of wind turbine system are the investigation basis of the impact on the wind power and electrical net- work.The dynamic characteristics of the active stall wind turbine system was presented in this paper.According to analy- sis of the mechanics of the incoming wind speed,aerodynamic characteristics,mechanical drive and generator of the unit,several main subsystem models such as aerodynamic model,drive model,induction machine transient model,com- pensation capacitors model,electrical network model and control system model were built-in.A integrate nonlinear dy- namic model was obtained from the models of subsystems.The dynamic performance of the system under different operat- ing condition were analyzed with numerical simulation of the model.The built model and simulation results provided the theoretical research foundation of the impact between the wind farm and the electrical network.