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首页> 外文期刊>Electric Power Components and Systems >Protection of Double-Circuit Line with Thyristor Controlled Series Capacitor Using Principal Component Analysis
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Protection of Double-Circuit Line with Thyristor Controlled Series Capacitor Using Principal Component Analysis

机译：基于主成分分析的晶闸管控制串联电容器对双回路线路的保护

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摘要

In this paper, a fault direction estimation algorithm is proposed for a double-circuit line with thyristor controlled series capacitor (TCSC) using principal component analysis (PCA)-based technique . In case of PCA, an orthogonal transformation is used to convert correlated variables into linearly uncorrelated variables called principal components. Fault in such a compensated line leads to voltage inversion, current inversion, and subsynchronous resonance situations, which affect the performance of the conventional direction estimation process. Transients associated with metal oxide varistor (MOV) operation and control action associated with TCSC, further modulate equivalent impedance of TCSC and MOV combination. In the proposed approach, PCA of angles between positive and negative sequence components of voltage current has been carried out to extract the pattern and to declare the fault direction accurately. The double-circuit line with TCSC is simulated using PSCAD/EMTDC software. The performance of the proposed technique is tested for numerous test cases, and it was found to be accurate.
机译：提出了一种基于主成分分析（PCA）技术的可控硅串联电容器（TCSC）双回线故障方向估计算法。对于PCA，使用正交变换将相关变量转换为线性不相关变量，称为主成分。这种补偿线路中的故障会导致电压反转，电流反转和次同步谐振情况，从而影响常规方向估计过程的性能。与金属氧化物变阻器（MOV）操作相关的瞬变和与TCSC相关的控制作用，进一步调制TCSC和MOV组合的等效阻抗。在提出的方法中，已经进行了电压电流的正序分量和负序分量之间的角度的PCA，以提取模式并准确地确定故障方向。使用PSCAD / EMTDC软件模拟了带有TCSC的双回线。在许多测试案例中测试了所提出技术的性能，并且发现它是准确的。

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