Extending the reactive compensation range of a direct AC–AC FACTS device for offshore grids
Extending the reactive compensation range of a direct AC–AC FACTS device for offshore grids
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DOI：
10.1016/j.epsr.2012.03.006
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发表时间：
2012-08
影响因子：
3.9
通讯作者：
N. Holtsmark;M. Molinas
中科院分区：
文献类型：
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作者：
N. Holtsmark;M. Molinas
提出采用混合调制方式提高由矩阵变换器和永磁电机组成的直接交-交FACTS装置的无功补偿能力。由于传统矩阵变换器调制方案的固有局限性，该装置迄今为止在输出功率因数低时显示出较差的无功功率补偿能力。更糟糕的是，直接AC-AC FACTS装置不能提供纯无功补偿。本文提出了一种分析，展示了如何混合三矢量方案扩展的无功补偿范围超出了传统的间接空间矢量调制的水平。两种调制方式的FACTS装置的无功补偿能力进行了计算和分析比较，最后通过仿真研究进行了验证。
The authors suggest to use hybrid modulation schemes to improve the reactive power compensation capabilities of the direct AC–AC FACTS device composed of a matrix converter and a permanent magnet machine. Because of the intrinsic limitations of the conventional matrix converter modulation schemes, the device has so far displayed a poor reactive power compensation capability when the output power factor is low. Even worse, the direct AC–AC FACTS device could not provide pure reactive power compensation. The paper presents an analysis demonstrating how the hybrid Three-Vector-Scheme extends the reactive compensation range beyond the level that the conventional indirect space vector modulation exhibits. The reactive power compensation capabilities of the FACTS device with both modulations are computed and compared analytically and finally verified by a simulation study.