Modeling and Analysis of Direct-drive Permanent Magnet Synchronous Wind Generation System
Modeling and Analysis of Direct-drive Permanent Magnet Synchronous Wind Generation System
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发表时间：
2008
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通讯作者：
L. Wenhua
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作者：
L. Wenhua
根据涡轮机的特点和最大功率点跟踪理论，设计了由永磁同步发电机和交-直-交变换器组成的仿真平台，基于PSCAD/EMTDC方法，建立了系统的部件模型，并给出了系统功能的实现方法，通过调节定子电流的正交分量来控制磁转矩，优化风能的吸收，逆变器调节真实的和无功本文还对系统在各种故障下的性能进行了仿真，并考虑到系统对提高系统故障耐受能力的要求，仿真结果表明，该系统能够根据不同风速优化风能吸收，具有适当的低电压穿越能力，对不平衡故障具有较强的耐受能力。
According to the characteristics of wind turbine and the maximum power point tracking theory,a simulation platform composed of a permanent magnet synchronous generator and an AC-DC-AC converter is designed,based on PSCAD/EMTDC.Component models are formed and the implementation of system functions is addressed.The magnetic torque is controlled by regulating quadrature stator current to optimize the wind energy absorption.And the inverter regulates real and reactive power independently.The present paper also simulates system performance during various system faults,considering requirements for the conversion system to improve system-fault endurance.Simulations prove that this system can optimize the wind energy absorption according to various wind speeds.It also has appropriate LVRT capability,and great endurance to unbalance faults.