Impact of Wind Turbines on Voltage Stability of Power Systems: Assessment and Improvement

2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC) Pub Date : 2021-02-02 DOI:10.1109/PEDSTC52094.2021.9405960

Mohamadreza Kholousi, S. Tohidi, N. Rostami

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Abstract

Increasing penetration level of wind turbines in power systems has created new challenges for power engineers. One of such important challenges is voltage stability of power system. According to the studies, when a synchronous generator is replaced by a wind turbine, voltage stability deteriorates. In this paper, voltage stability of power systems in the presence of different types of wind turbines is studied. First, considering the different stability indicators, impact of different types of wind turbines on voltage stability is compared with each other. Then, impact of different control modes of variable speed wind turbines on voltage stability is evaluated. Also, due to the high impact of output reactive power of variable speed wind turbines on the voltage stability indicators, both during and after the fault, a method based on mathematical calculations has been proposed to obtain the optimal reference value of reactive power. Effectiveness of the proposed method in voltage stability improvement has been shown via simulations performed by MATLAB/Simulink software.

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风力发电机对电力系统电压稳定性的影响:评估与改进

风力涡轮机在电力系统中的渗透水平不断提高，给电力工程师带来了新的挑战。电力系统的电压稳定性是其中一个重要的挑战。研究表明，当同步发电机被风力发电机取代时，电压稳定性会恶化。本文研究了不同类型风力发电机组存在时电力系统的电压稳定性问题。首先，考虑不同的稳定性指标，比较不同类型风力机对电压稳定性的影响。然后，评估了变速风力发电机组不同控制方式对电压稳定性的影响。同时，由于变速风电机组的输出无功功率在故障时和故障后对电压稳定指标的影响较大，本文提出了一种基于数学计算的无功功率最佳参考值获取方法。通过MATLAB/Simulink软件的仿真，证明了该方法在提高电压稳定性方面的有效性。

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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2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)

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