Dynamic performance evaluation of DFIG-based wind turbines regarding new German grid code requirements

IEEE PES General Meeting Pub Date : 2010-07-25 DOI:10.1109/PES.2010.5589562

C. Feltes, S. Engelhardt, J. Kretschmann, J. Fortmann, I. Erlich

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引用次数: 26

Abstract

Current grid codes require the fault ride-through capability of modern wind turbines. During grid faults the reactive current control of the wind turbines should be used to support the grid voltage. With modern protection devices the fault durations are normally in a range of some hundred milliseconds or less. However this time window may be decisive for the stability of the conventional generators connected to the grid and consequently for the whole system. In this regard the dynamic response of the voltage support by the generation units is a very important issue. New German grid codes address this subject by specifying timing rules for the system response to grid faults. While wind turbines equipped with full-size converters can fulfil these rules with moderate effort due to their fast converter control, DFIG-based wind turbines are facing a new big challenge, which requires a dedicated control. This paper shows an extended control approach that deals with a highly dynamic response to grid faults. Simulation results prove the good performance of this control and validate it based on the new requirements.

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基于dfig的风力发电机在德国新电网规范要求下的动态性能评估

目前的电网规范要求现代风力涡轮机具有故障穿越能力。在电网发生故障时，应采用风力发电机组无功电流控制来支撑电网电压。现代保护装置的故障持续时间通常在几百毫秒或更短的范围内。然而，这个时间窗口可能对连接到电网的传统发电机的稳定性以及整个系统的稳定性具有决定性作用。在这方面，发电机组支持电压的动态响应是一个非常重要的问题。新的德国电网代码通过指定系统响应电网故障的定时规则来解决这个问题。虽然配备全尺寸变流器的风力涡轮机由于其快速的变流器控制可以以适度的努力满足这些规则，但基于dfig的风力涡轮机面临着新的巨大挑战，这需要专门的控制。本文提出了一种扩展控制方法，用于处理电网故障的高动态响应。仿真结果证明了该控制方法的良好性能，并对该控制方法进行了验证。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IEEE PES General Meeting

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