不对称故障下梯形电动势永磁同步电机的控制

J. Ivanqui, Pércio L. K. Miranda, H. Voltolini, R. Carlson
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引用次数: 1

摘要

提出了一种基于瞬时功率理论的风力发电并网永磁同步发电机(PMSG)控制方法。考虑到PMSG梯形电动势(EMF),所提出的pq控制比基于Park变换的控制更有利,因为它减少了电磁转矩脉动,并且消除了正弦函数的计算。该方法简单、高效,适用于中等功率风力涡轮机。带空间矢量PWM调制的背靠背电压源转换器将该发电机连接到电网。作为被测转子位置的函数,生成一个梯形电动势参考曲线。直流链路电压控制在发电机侧,即使在电网连接处存在不对称电压下降的情况下也能保证其控制。实现了风电机组最大功率点(MTPP)跟随策略。在Matlab/Simulink中对整个系统进行了建模。用一个3kw的PMSG建立了一个试验台,其中包括一个风力涡轮机模拟器来驱动PMSG。仿真和实验结果验证了所提出的控制策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Control of a trapezoidal EMF PMSG under asymmetrical faults
A new control of a grid connected permanent magnet synchronous generator (PMSG) for wind turbines based on the Instantaneous Power Theory (pq Theory) is proposed. Given the PMSG trapezoidal electromotive force (EMF), the proposed pq control is advantageous over those based on the Park transformation, because it reduces the electromagnetic torque ripple and eliminates the calculation of sinusoidal functions. It is simpler and efficient and well adapted to medium power wind turbines. Back-to-back voltage source converters with space vector PWM modulation connect this generator to the grid. A trapezoidal EMF reference curve is generated as a function of the measured rotor position. The DC link voltage is controlled at the generator side, ensuring its control even in the presence of asymmetrical voltage sag at the grid connection. A wind turbine maximum turbine power point (MTPP) following strategy is also implemented. The complete system has been modeled in Matlab/Simulink. A test bench was build with a 3 kW PMSG that included a wind turbine emulator to drive the PMSG. Simulated and experimental results are presented that validate the proposed control strategy.
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