一种永磁同步风力发电机模型及其控制策略

A Permanent Magnet Synchronous Generator Model and Its Control Strategy

摘要: 永磁同步电机(PMSG)控制是发电机组中最为关键的环节，其直接关系着发电机输出的电能质量。本文通过分析永磁同步风力发电机数学机理，分别对发电机的电压、磁链、电磁转矩以公式进行推导，根据坐标变换原理，提出采用基于外环速度、内环电流控制的双闭环矢量控制策略，该方法简便易行，对输出变量控制效果较好，最后建立发电机侧仿真模型，并分析仿真结果，验证控制策略的正确性和有效性。

Abstract: Permanent magnet synchronous motor (PMSG) control is the key link in the generator set, and it di-rectly relates to the power quality of the generator output. In this paper, through analysis of perma-nent magnet synchronous wind generator mathematical mechanism, generator voltage, flux and elec- tromagnetic torque are derived respectively using formulas. According to the principle of coordinate transformation, double closed loop vector control strategy based on outer ring speed and current loop control is proposed. The method is simple and convenient, and on the output variable it has a good control effect. And finally this paper establishes the simulation model of the generator side, analyzes the simulation results and verifies the correctness and effectiveness of the control strategy.