Analytical Evaluation to Power System Oscillation Damping Capability of DFIG-POD Based on Path Damping Torque Analysis

IF 8.6 1区 工程技术 Q1 ENERGY & FUELS IEEE Transactions on Sustainable Energy Pub Date : 2024-09-25 DOI:10.1109/TSTE.2024.3467686
Shenghu Li;Jianqiao Ye
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Abstract

The increasing wind power decreases power system damping and may intensify low-frequency oscillation (LFO). The LFO are usually damped by the power system stabilizer (PSS) at synchronous generator (SG), and now by the power oscillation damper (POD) at doubly-fed induction generator (DFIG). The existing damping torque analysis (DTA) sets the parameters of the PSS and evaluates its damping capability, but can not be applied to the POD due to the difficulty of finding the damping path related to the DFIG and the coupling between the POD and the DFIG, which are studied in this paper. At first, the analytical expression of the coupling between the POD and DFIG is newly derived with linear fractional transformation (LFT) technique. Then the path damping torque analysis (PDTA) is proposed to reconstruct the damping path of the POD. Thirdly, the damping indicator based on the return difference matrix is proposed to evaluate the contribution of damping path to the LFO. Finally, numerical results of test system are given to validate effectiveness and accuracy of the proposed model, and parameter optimization to the multi-input POD (MIPOD) is performed to show the application value of the proposed model.
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基于路径阻尼力矩分析的DFIG-POD电力系统减振能力分析评价
风电功率的增加降低了电力系统的阻尼,并可能加剧低频振荡。低飞力矩通常由同步发电机(SG)的电力系统稳定器(PSS)抑制,现在由双馈感应发电机(DFIG)的功率振荡阻尼器(POD)抑制。现有的阻尼力矩分析(DTA)是对PSS的参数进行设定并评估其阻尼能力,但由于难以找到与DFIG相关的阻尼路径以及POD与DFIG之间的耦合问题,本文对其进行了研究,因此无法应用于POD。首先,利用线性分数变换(LFT)技术,导出了POD与DFIG耦合的解析表达式。然后提出了路径阻尼力矩分析(PDTA)来重构POD的阻尼路径。再次,提出了基于回归差分矩阵的阻尼指标来评价阻尼路径对LFO的贡献。最后,给出了试验系统的数值结果,验证了所提模型的有效性和准确性,并对多输入POD (MIPOD)进行了参数优化,验证了所提模型的应用价值。
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来源期刊
IEEE Transactions on Sustainable Energy
IEEE Transactions on Sustainable Energy ENERGY & FUELS-ENGINEERING, ELECTRICAL & ELECTRONIC
CiteScore
21.40
自引率
5.70%
发文量
215
审稿时长
5 months
期刊介绍: The IEEE Transactions on Sustainable Energy serves as a pivotal platform for sharing groundbreaking research findings on sustainable energy systems, with a focus on their seamless integration into power transmission and/or distribution grids. The journal showcases original research spanning the design, implementation, grid-integration, and control of sustainable energy technologies and systems. Additionally, the Transactions warmly welcomes manuscripts addressing the design, implementation, and evaluation of power systems influenced by sustainable energy systems and devices.
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