5MW陆上风力发电系统故障建模与仿真

Fault Modeling and Simulation of 5 MW Onshore Wind Power System

随着风电行业对系统稳定性要求的提高,对其进行准确的故障建模是十分必要的。以Openfast中提供的5 MW陆上风机模型为背景,建立了风电系统传感器和执行器故障模型,采用增益PI变桨距控制。在Simulink中搭建了控制子系统模型与其联合仿真,在此基础上对变桨系统的执行器以及转速传感器分别进行故障模拟,结果显示系统能够准确反映各种故障发生时的情况,验证了该故障模型具有一定的准确性,为后续的故障诊断和容错控制的工作提供了基础。

The elevated requirements by wind power industry for system stability highlights the necessity of accurate fault modeling of wind generators.Based on the 5 MW onshore wind turbine model provided by Openfast,a control subsystem model and its co-simulation in Simulink were built in this paper.Furthermore,fault simulation of pitch actuators and speed sensors of the pitch system was carried out respectively.The simulation results show that the system can accurately reflect the situation when various faults occur.The accuracy of the fault model is verified,which provides experience for subsequent fault diagnosis and fault tolerance control of the system.