protection scheme of power transformer based on time–frequency analysis and ksir-ssvm

Authors

mehdi hajian

asghar akbari foroud

abstract

the aim of this paper is to extend a hybrid protection plan for power transformer (pt) based on mra-ksir-ssvm. this paper offers a new scheme for protection of power transformers to distinguish internal faults from inrush currents. some significant characteristics of differential currents in the real pt operating circumstances are extracted. in this paper, multi resolution analysis (mra) is used as time–frequency analysis (tfa) for decomposition of contingency transient signals (ctss), and feature reduction is done by kernel sliced inverse regression (ksir). smooth supported vector machine (ssvm) is utilized for classification. integration ksir and ssvm is tackled as most effective and fast technique for accurate differentiation of the faulted and unfaulted conditions. the particle swarm optimization (pso) is used to obtain optimal parameters of the classifier. the proposed structure for power transformer protection (ptp) provides a high operating accuracy for internal faults and inrush currents even in noisy conditions. the efficacy of the proposed scheme is tested by means of numerous inrush and internal fault currents. the achieved results are utilized to verify the suitability and the ability of the proposed scheme to make a distinction inrush current from internal fault. the assessment results illustrate that proposed scheme presents an enhancement of distinguish inrush current from internal fault over the method to be compared without dimension reduction (dr).

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Protection Scheme of Power Transformer Based on Time–Frequency Analysis and KSIR-SSVM

The aim of this paper is to extend a hybrid protection plan for Power Transformer (PT) based on MRA-KSIR-SSVM. This paper offers a new scheme for protection of power transformers to distinguish internal faults from inrush currents. Some significant characteristics of differential currents in the real PT operating circumstances are extracted. In this paper, Multi Resolution Analysis (MRA) is use...

full text

application of upfc based on svpwm for power quality improvement

در سالهای اخیر،اختلالات کیفیت توان مهمترین موضوع می باشد که محققان زیادی را برای پیدا کردن راه حلی برای حل آن علاقه مند ساخته است.امروزه کیفیت توان در سیستم قدرت برای مراکز صنعتی،تجاری وکاربردهای بیمارستانی مسئله مهمی می باشد.مشکل ولتاژمثل شرایط افت ولتاژواضافه جریان ناشی از اتصال کوتاه مدار یا وقوع خطا در سیستم بیشتر مورد توجه می باشد. برای مطالعه افت ولتاژ واضافه جریان،محققان زیادی کار کرده ...

15 صفحه اول

Modeling and Simulation of Modern Digital Differential Protection Scheme of Power Transformer based on FIS

In this paper, a differential protection schemes using fuzzy inference system (FIS) for power transformer protection is presented. First we review the concept of differential protection, and illustrate the magnetizing inrush current as they belong to the causes of the protection maloperation. Then relay logic and the algorithm that uses Discreet Fourier transformer for extraction of fundamental...

full text

A Novel Flux-Based Protection Scheme for Power Transformers

Internal Turn-Turn faults (TTF) are the most common failures in power transformers, which could seriously reduce their life expectancy. Although common protection schemes such as current-baseddifferential protection are able to detect some of the internal faults, some other minor ones (such as TTFs andshort circuit near the neutral point) cannot be detected by such schemes. Likewise, these rela...

full text

Wavelet and ANN Based Relaying for Power Transformer Protection

This paper presents an efficient wavelet and neural network (WNN) based algorithm for distinguishing magnetizing inrush currents from internal fault currents in three phase power transformers. The wavelet transform is applied first to decompose the current signals of the power transformer into a series of detailed wavelet components. The values of the detailed coefficients obtained can accurate...

full text

a novel flux-based protection scheme for power transformers

internal turn-turn faults (ttf) are the most common failures in power transformers, which could seriously reduce their life expectancy. although common protection schemes such as current-baseddifferential protection are able to detect some of the internal faults, some other minor ones (such as ttfs andshort circuit near the neutral point) cannot be detected by such schemes. likewise, these rela...

full text

My Resources

Save resource for easier access later


Journal title:
journal of ai and data mining

Publisher: shahrood university of technology

ISSN 2322-5211

volume 1

issue 1 2013

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023