A preordainment approach for design of auxiliary damping controller and SSSC tuning to enhance SSR mode stability in DFIG based windfarm

IF 2.4 Q2 MULTIDISCIPLINARY SCIENCES
Chirag Rohit, P. Darji, H. Jariwala
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引用次数: 0

Abstract

ABSTRACT Sub-synchronous resonance (SSR) is a growing concern in wind turbine generators-based series capacitive compensated networks at low wind speed and peak compensation levels. It is feasible to increase the stability of SSR mode caused by a transmission line’s passive series compensation by providing active compensation using a flexible ac transmission system controller cooperating with an auxiliary damping controller. This paper presents preordainment and enhancement of SSR mode in DFIG-based series capacitive compensated line by incorporating an additional damping controller into the static synchronous series compensator (SSSC). The auxiliary damping controller modulates the reactive voltage injected by SSSC into the transmission line by considering the appropriate input control signal, reflecting the SSR instability, and giving the maximum damping to the SSR mode. The optimal input control signal is determined via residue analysis, and the design procedure of the auxiliary damping controller is presented using root locus plots. The root locus plots offer a visual representation of the loci for each mode and preordain eigenvalues for new stability, which aids in the design of the auxiliary damping controller. This feature allows to predetermine the SSR mode eigenvalue while before connecting it with SSSC. Accordingly, it provides a controlled dampening to SSR mode such that the desired damping ratio for SSR mode can be achieved without influencing the stability of other modes. The impact of the designed auxiliary damping controller is examined at high compensation levels and low wind speed. The eigenvalue analysis results show that the preordained eigenvalues found using root locus plots are correct and the proposed approach predominantly enhances the stability of SSR mode. The fast Fourier transform (FFT) analysis and transient simulations are used to show the detuning and dampening of SSR mode. The proposed work is executed using MATLAB/Simulink.
基于DFIG的风电场中辅助阻尼控制器设计和SSSC调谐的预定方法以提高SSR模式的稳定性
摘要:在低风速和峰值补偿水平下,基于风力发电机组的串联电容补偿网络中,次同步谐振(SSR)越来越受到关注。通过使用柔性交流输电系统控制器与辅助阻尼控制器配合提供主动补偿,可以提高输电线路无源串联补偿引起的SSR模式的稳定性。本文通过在静态同步串联补偿器(SSSC)中加入附加阻尼控制器,对基于DFIG的串联电容补偿线路的SSR模式进行了预处理和增强。辅助阻尼控制器通过考虑适当的输入控制信号来调制SSSC注入输电线路的无功电压,反映SSR的不稳定性,并为SSR模式提供最大阻尼。通过残差分析确定了最优输入控制信号,并利用根轨迹图给出了辅助阻尼控制器的设计过程。根轨迹图提供了每个模式的轨迹和新稳定性的预定特征值的视觉表示,这有助于辅助阻尼控制器的设计。该特征允许在将SSR模式特征值与SSSC连接之前预先确定该特征值。因此,它为SSR模式提供了受控的阻尼,使得可以在不影响其他模式的稳定性的情况下实现SSR模式的期望阻尼比。研究了所设计的辅助阻尼控制器在高补偿水平和低风速下的影响。特征值分析结果表明,使用根轨迹图找到的预定特征值是正确的,并且所提出的方法显著提高了SSR模式的稳定性。利用快速傅立叶变换(FFT)分析和瞬态仿真,研究了SSR模的失谐和阻尼。利用MATLAB/Simulink对所提出的工作进行了仿真。
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
Smart Science
Smart Science Engineering-Engineering (all)
CiteScore
4.70
自引率
4.30%
发文量
21
期刊介绍: Smart Science (ISSN 2308-0477) is an international, peer-reviewed journal that publishes significant original scientific researches, and reviews and analyses of current research and science policy. We welcome submissions of high quality papers from all fields of science and from any source. Articles of an interdisciplinary nature are particularly welcomed. Smart Science aims to be among the top multidisciplinary journals covering a broad spectrum of smart topics in the fields of materials science, chemistry, physics, engineering, medicine, and biology. Smart Science is currently focusing on the topics of Smart Manufacturing (CPS, IoT and AI) for Industry 4.0, Smart Energy and Smart Chemistry and Materials. Other specific research areas covered by the journal include, but are not limited to: 1. Smart Science in the Future 2. Smart Manufacturing: -Cyber-Physical System (CPS) -Internet of Things (IoT) and Internet of Brain (IoB) -Artificial Intelligence -Smart Computing -Smart Design/Machine -Smart Sensing -Smart Information and Networks 3. Smart Energy and Thermal/Fluidic Science 4. Smart Chemistry and Materials
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