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Displacement of the maximum power point caused by losses in wind turbine systems

机译：风力涡轮机系统中的损耗引起的最大功率点的位移

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摘要

The energy yield of wind turbines is to a large extent determined by the performance of the Maximum Power Point Tracking (MPPT) algorithm. Conventionally, they are programmed to maximize the turbines power coefficient. However, due to losses in the generator and converter, the true optimal operating point of the system shifts. This effect is often overlooked, which results in a decreased energy yield. Therefore, in this paper, the wind turbine system is modeled including the dominant loss components to investigate this effect in detail. By simulations and experiments on a wind turbine emulator, it is shown that the location of the maximum power point is significantly affected for low wind speeds. For high wind speeds, the effect is less pronounced. The parameter of interest is the increase in yearly energy output with respect to the classical MPPT method, which is calculated in this paper by including a Rayleigh wind speed distribution. For typical average wind speeds, the energy yield can increase with 1 -2%. There is no cost associated with operating the turbine in the overall MPP, making it worthwhile to include this effect. The findings are implemented in an MPPT algorithm to validate the increased performance in a dynamic situation. (C) 2015 Elsevier Ltd. All rights reserved.
机译：风力涡轮机的能量产出在很大程度上取决于最大功率点跟踪（MPPT）算法的性能。通常，对它们进行编程以最大化涡轮机的功率系数。但是，由于发电机和变流器中的损耗，系统的真正最佳工作点会发生变化。这种效果经常被忽略，导致能量产量降低。因此，在本文中，对包括主要损耗成分的风力涡轮机系统进行了建模，以详细研究这种影响。通过在风力涡轮机仿真器上的仿真和实验，可以看出，对于低风速，最大功率点的位置会受到显着影响。对于高风速，效果不太明显。感兴趣的参数是相对于经典MPPT方法的年发电量增加量，该方法是通过包含瑞利风速分布来计算得出的。对于典型的平均风速，能量产出可以增加1-2％。在整个MPP中没有与运行涡轮相关的成本，因此值得将此效果包括在内。这些发现以MPPT算法实现，以验证动态情况下性能的提高。 （C）2015 Elsevier Ltd.保留所有权利。

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