Voltage Sag Evaluation in Power Grids Considering the Voltage Support Capabilities of Doubly-Fed Wind Farms During LVRT

IF 3.8 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Yi Zhang;Jiazhong Zhang;Chuandong Li;Jieyu Ou;Wei Zhao;Shuqi Zhang
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引用次数: 0

Abstract

This paper introduces how doubly-fed wind farms can compensate for reactive power demands of the grid during low voltage ride through (LVRT) events, thereby providing voltage support. This capability significantly influences the assessment of voltage sag. To address this, this paper proposes a method for assessing voltage sags in the power grid that considers the voltage support capabilities of doubly-fed wind farm during LVRT. This method accurately characterizes the voltage support capability during LVRT by establishing a dynamic equivalent model of the wind farm. For each wind farm, the clustering is based on the Crowbar status determination as the primary clustering criterion, while the interconnected voltage at the point of common coupling (PCC), considering the mutual influence among multiple wind farms, is used as a correction factor for iterative clustering. By utilizing collaborative equivalence of multiple wind farms, the final dynamic equivalent model is determined. Subsequently, a comprehensive simulation of various grid fault scenarios is conducted to evaluate the voltage sag. The proposed method's accuracy and effectiveness have been validated through case studies.
考虑双馈风电场LVRT电压保障能力的电网电压暂降评估
本文介绍了双馈风电场如何在低压穿越(LVRT)事件中补偿电网的无功需求,从而提供电压支持。这种能力对电压暂降的评估有重要影响。针对这一问题,本文提出了一种考虑LVRT期间双馈风电场电压支撑能力的电网电压跌落评估方法。该方法通过建立风电场动态等效模型,准确表征了LVRT期间风电场的电压支撑能力。对各风电场进行聚类,以Crowbar状态确定为主要聚类准则,以共耦合点(PCC)电压为校正因子,考虑多个风电场相互影响,进行迭代聚类。利用多个风电场的协同等效,确定最终的动态等效模型。随后,对各种电网故障场景进行了综合仿真,对电压暂降进行了评估。通过实例验证了该方法的准确性和有效性。
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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来源期刊
IEEE Transactions on Power Delivery
IEEE Transactions on Power Delivery 工程技术-工程:电子与电气
CiteScore
9.00
自引率
13.60%
发文量
513
审稿时长
6 months
期刊介绍: The scope of the Society embraces planning, research, development, design, application, construction, installation and operation of apparatus, equipment, structures, materials and systems for the safe, reliable and economic generation, transmission, distribution, conversion, measurement and control of electric energy. It includes the developing of engineering standards, the providing of information and instruction to the public and to legislators, as well as technical scientific, literary, educational and other activities that contribute to the electric power discipline or utilize the techniques or products within this discipline.
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