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首页> 外文期刊>Journal of Power and Energy Engineering >DFIG Voltage Control Based on Dynamically Adjusted Control Gains
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DFIG Voltage Control Based on Dynamically Adjusted Control Gains

机译：基于动态调节控制增益的DFIG电压控制

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摘要

The increasing penetration of wind power presents many technical challenges to power system operations. An important challenge is the need of voltage control to maintain the terminal voltage of a wind plant to make it a PV bus like conventional generators with excitation control. In the previous work for controlling wind plant, especially the Doubly Fed Induction Generator (DFIG) system, the proportional-integral (PI) controllers are popularly applied. These approaches usually need to tune the PI controllers to obtain control gains as a tradeoff or compromise among various operating conditions. In this paper, a new voltage control approach based on a different philosophy is presented. In the proposed approach, the PI control gains for the DFIG system are dynamically adjusted based on the dynamic, continuous sensitivity which essentially indicates the dynamic relationship between the change of control gains and the desired output voltage. Hence, this control approach does not require any good estimation of fixed control gains because it has the self-learning mechanism via the dynamic sensitivity. This also gives the plug-and-play feature of DFIG controllers to make it promising in utility practices. Simulation results verify that the proposed approach performs as expected under various operating conditions.
机译：风电的普及率不断提高，对电力系统的运行提出了许多技术挑战。一个重要的挑战是需要电压控制来维持风力发电厂的终端电压，以使其像传统的带有励磁控制的发电机那样成为PV总线。在先前的控制风力发电厂的工作中，尤其是双馈感应发电机（DFIG）系统中，比例积分（PI）控制器得到了广泛应用。这些方法通常需要调整PI控制器以获得控制增益，这是各种操作条件之间的折衷或折衷方案。本文提出了一种基于不同原理的新电压控制方法。在所提出的方法中，基于动态连续灵敏度来动态调整DFIG系统的PI控制增益，该灵敏度本质上表明了控制增益变化与所需输出电压之间的动态关系。因此，该控制方法不需要任何固定控制增益的良好估计，因为它具有通过动态灵敏度进行自学习的机制。这也提供了DFIG控制器的即插即用功能，使其在实用程序实践中很有前途。仿真结果验证了所提出的方法在各种操作条件下都能达到预期的效果。

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