نتایج جستجو برای: distance protection

تعداد نتایج: 415174  

Journal: :International Journal of Research in Engineering and Technology 2014

Journal: :International Journal of Electrical Power & Energy Systems 2021

This paper presents a new fault detection algorithm based on the Fast Discrete Stockwell Transform. The can improve functionality of existing distance protection and resolve shortcomings identified during process in case occurrence systems with high penetration power electronics-based generators. Reported results operation commercial relays four different vendors show that all experience diffic...

Journal: :Acta tropica 2012
Edita E Revay Amy Junnila Daniel L Kline Rui-De Xue Ulrich R Bernier Vasiliy D Kravchenko Zoya A Yefremova Günter C Müller

We conducted a study to determine the degree of personal protection provided by the Terminix(®) ALLCLEAR(®) Mosquito Mister - Lantern Edition. This outdoor unit was operated to disperse an aerosolized aqueous 0.3% geraniol emulsion in timed-release intervals of 5.0, 7.5, and 10.0 min. Human volunteers participated in landing catch experiments to test the effect of geraniol sprayed at pre-set ti...

2012
J. Havelka R. Malarić K. Frlan

In order to analyze the operation of the protection system during induced fault testing in the Croatian power system, a simulation using the CAPE software has been performed. The CAPE software (Computer-Aided Protection Engineering) is expert software intended primarily for relay protection engineers, which calculates current and voltage values during faults in the power system, so that relay p...

2012
G. B. Gharehpetian

Catastrophic failures in power grid due to maloperation of traditional backup protection system (e.g. third zone of distance relays) was one of the main causes of many cascade trips. This paper assess a new wide-area backup protection system (WABPS) based on phasor measurement units (PMU), to improve third zone of distance relays to avoid its mal-operation. Based on this assessment, phasor meas...

2005
S. R. Samantaray Pradipta Kishore Dash Ganapati Panda Bijaya K. Panigrahi

A new approach for protection of transmission line including TCSC is presented in this paper. The proposed method includes application of Fuzzy Neural Network for distance relaying of a transmission line operating with a thyristor controlled series capacitor (TCSC) protected by MOVs. Here the fuzzy neural network (FNN) is used for calculating fault location on the TCSC line. The FNN structure i...

Journal: :journal of agricultural science and technology 2016
h. ramezani a. grafstrom h. naghavi a. fallah sh. shataee

three k-tree distance and fixed-sized plot designs were used for estimating tree density in sparse oak forests. these forests cover the main part of the zagros mountain area in western iran. they are non-timber-oriented forest but important for protection purposes. the main objective was to investigate the statistical performance of k-tree distance and fixed-sized plot designs in the estimation...

2007
Zexin Zhou Xiaofan Shen Daqing Hou Shaojun Chen

Deregulation, increased loads, and limited resources/rights-of-way available for the building of new transmission lines are routinely pushing modern power transmission networks to operating limits. New generations of microprocessor relays provide design opportunities that help stressed transmission networks meet protection requirements. To verify that increasingly complex microprocessor relays ...

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