风电系统中机侧整流器故障仿真与特性分析

Fault Simulation and Characteristic Analysis of Machine-Side Rectifier in Wind Power System

摘要: 本文以风力发电控制系统中变流器开关管为研究对象，对其开路故障进行特性分析。首先对风电系统中机侧整流器进行数学建模分析，并介绍了主要控制策略；然后以此为基础建立了直驱式永磁风力发电系统机侧变流器MATLAB仿真模型；分析了整流器功率开关管开路故障的作用原理；最后分别模拟了单管和双管在不同桥臂上的开路故障，并分析了各类型开路故障对系统关键参数的影响。分析结果表明风力发电系统中变流器开路故障对系统影响较大，必须采取一定的措施进行防止。

Abstract: This article takes the switching device of the inverter in the wind power control system as the re-search object and conducts characteristic analysis on its open-circuit fault. Firstly, the mathematical modeling and analysis of the machine-side rectifier in the wind power system are carried out, and the main control strategies are introduced. Then, based on this, a direct-drive permanent magnet wind power generation system machine -side inverter MATLAB simulation model is established. The principle of the open-circuit fault of the power switch of the rectifier is analyzed. Finally, the open-circuit faults of single and double switches on different bridge arms are simulated respective-ly, and the influence of each type of open-circuit fault on the key parameters of the system is ana-lyzed. The analysis results show that the open-circuit fault of the inverter in the wind power gener-ation system has a significant impact on the system and certain measures must be taken to prevent it.