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Review on FRT solutions for improving transient stability in DFIG-WTs

机译:回顾FRT解决方案以改善DFIG-WT中的瞬态稳定性

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摘要

Fault-ride-through (FRT) is an imperative capability in wind turbines (WTs) to ensure grid security and transient stability. However, doubly fed induction generator-based WTs (DFIG-WTs) are susceptible to disturbances in grid voltage, and therefore require supplementary protection to ensure nominal operation. The recent amendments in grid code requirements to ensure FRT capability has compelled this study of various FRT solutions. Therefore, for improving FRT capability in pre-installed WTs, re-configuration using external retrofit-based solutions is more suitable and generally adapted. The most relevant external solutions based on retrofitting available are classified as (a) protection circuit and storage-based methods and (b) flexible alternating current transmission system-based reactive power injection methods. However, for new DFIG-WT installations, internal control modification of rotor-side converter (RSC) and grid-side converter (GSC) controls are generally preferred. The solutions based on modifications in RSC and GSC control of DFIG-WT are classified as (a) traditional control techniques and (b) advanced control techniques. This study ensures to curate and compare the FRT solutions available based on external retrofitting-based solutions and internal control modifications. Also, the future trends in FRT augmentation of DFIG-WTs are discussed in this study.
机译:穿越故障(FRT)是风力涡轮机(WTs)的一项必不可少的功能,可确保电网安全和暂态稳定性。但是,基于双馈感应发电机的WT(DFIG-WT)易受电网电压干扰的影响,因此需要补充保护以确保正常工作。为了确保FRT功能,最近对电网规范要求进行的修订已迫使对各种FRT解决方案进行此研究。因此,为了提高预装WT中的FRT能力,使用基于外部改装的解决方案进行重新配置更为合适,并且通常会采用。基于改造的最相关的外部解决方案可分为(a)保护电路和基于存储的方法,以及(b)基于灵活交流输电系统的无功注入方法。但是,对于新的DFIG-WT安装,通常首选对转子侧变流器(RSC)和电网侧变流器(GSC)控件进行内部控制的修改。基于对DFIG-WT的RSC和GSC控制进行修改的解决方案分为(a)传统控制技术和(b)先进控制技术。这项研究可确保根据基于外部改装的解决方案和内部控制的修改来策划和比较可用的FRT解决方案。同样,在这项研究中讨论了DFIG-WT的FRT增强的未来趋势。

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