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首页> 外文期刊>International review of electrical engineering >Analysis and Comparison of Control Strategies for a DFIG-Small Wind Turbine System with High Fluctuating Wind Speed Conditions
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Analysis and Comparison of Control Strategies for a DFIG-Small Wind Turbine System with High Fluctuating Wind Speed Conditions

机译：风速波动较大的双馈小风力发电机组控制策略分析与比较

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摘要

The main purposes of this paper are to analyse and to compare power quality, modes of machine operation and robusness under two difference control strategies on DFIG-based wind turbine systems: (1) Rotor speed control strategy (RSCS) and (2) Power control strategy (PCS). Both of these strategies could be utilized to maximize wind-power harvesting. In this work, the feedback control loops are designed by using the same optimum Proportional Integral-based vector control strategy. The major focus in this study is on a small-scale wind turbine that characterized by a small mass moment of inertia. By using simulation studies, it is found that the power dynamicresulted by the two control strategiesunder fluctuating wind conditions arerelatively different: the power generated underthe RSCSis more fluctuate compare to the PCS. Even, for extreme cases where the wind speed changes suddenly, the utilization of the RSCSfor a while could bring the machine enters to the motoring mode.In the motoring mode, instead delivering power to the grid, the stator windings of the DFIG will absorb some power from the grid. From simulation results, it is also found that the RSCSin general is less robust compared to the PCS.
机译：本文的主要目的是分析和比较基于DFIG的风力涡轮机系统的两种差异控制策略下的电能质量，机器运行模式和鲁棒性：（1）转子速度控制策略（RSCS）和（2）功率控制策略（PCS）。这两种策略都可以用来最大化风能的收集。在这项工作中，通过使用相同的最佳基于比例积分的矢量控制策略来设计反馈控制回路。这项研究的主要重点是以小质量惯性矩为特征的小型风力发电机。通过仿真研究，发现两种控制策略在风的波动条件下产生的动力动态相对不同：与PCS相比，在RSCS下产生的动力波动更大。即使在极端情况下（风速突然变化），使用RSCS一段时间也会使机器进入电动模式。在电动模式下，DFIG的定子绕组会吸收一些电能，而不是向电网供电电网供电。从仿真结果还发现，与PCS相比，RSCS总体上不那么健壮。

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