Overvoltages and Transients Identification In On-line Bushing Monitoring

Overvoltages and transients are sometimes recognized as the cause of bushings’ rapid failure. This fact is confirmed by the studies published at the 2018 CIGRE session. They can also initiate dangerous resonance phenomena in transformer windings. The identification of very fast overvoltages characterized by high dynamics of voltage changes, so-called "transients", is difficult due to the limited frequency response of station voltage transformers. However, the bushing monitoring systems, based on the so-called "voltage method" can be used for this purpose successfully. There are several running bushing monitoring systems based on this method in Poland. The transients’ events are registered together with their oscillographs in Transformer Monitoring Systems (TMS). The overvoltage statistics are also performed to support service procedures.The TMS are integrated with station systems, which greatly increases the possibility of overvoltages phenomena analyzing.

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Application of a Specialized Passive Filter to Correct the Frequency Response of the Supply Network in order to Eliminate the Negative Impact of Resonance Phenomena

2020 Russian Workshop on Power Engineering and Automation of Metallurgy Industry: Research & Practice (PEAMI) ◽

10.1109/peami49900.2020.9234378 ◽

2020 ◽

Author(s):

A. A. Nikolaev ◽

M. Yu. Afanasev ◽

M. V. Bulanov

Keyword(s):

Frequency Response ◽

Negative Impact ◽

Supply Network ◽

Passive Filter ◽

Resonance Phenomena

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Quick ECG Analysis for On-Line Holter Monitoring Systems

2006 International Conference of the IEEE Engineering in Medicine and Biology Society ◽

10.1109/iembs.2006.4397743 ◽

2006 ◽

Author(s):

Laszlo Szilagyi ◽

Sandor M. Szilagyi ◽

Gergely Fordos ◽

Zoltan Benyo

Keyword(s):

Holter Monitoring ◽

Monitoring Systems ◽

Ecg Analysis ◽

On Line

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Frequency response characteristics of ambulatory ECG monitoring systems and their implications for ST segment analysis

American Heart Journal ◽

10.1016/0002-8703(82)90524-5 ◽

1982 ◽

Vol 103 (1) ◽

pp. 20-31 ◽

Cited By ~ 151

Author(s):

Deborah A. Bragg-Remschel ◽

Charles M. Anderson ◽

Roger A. Winkle

Keyword(s):

Frequency Response ◽

Monitoring Systems ◽

Ecg Monitoring ◽

Response Characteristics ◽

Ambulatory Ecg ◽

Ambulatory Ecg Monitoring ◽

St Segment ◽

Frequency Response Characteristics

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Loss of low-frequency data in on- line frequency response analysis of transformers

IEEE Electrical Insulation Magazine ◽

10.1109/mei.2017.8014389 ◽

2017 ◽

Vol 33 (5) ◽

pp. 32-39 ◽

Cited By ~ 10

Author(s):

Mehdi Bagheri ◽

Svyatoslav Nezhivenko ◽

B. T. Phung

Keyword(s):

Frequency Response ◽

Low Frequency ◽

Response Analysis ◽

Frequency Data ◽

Frequency Response Analysis ◽

Line Frequency ◽

On Line

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The Development of Production Monitoring Systems

Proceedings of the Institution of Mechanical Engineers Part B Management and engineering manufacture ◽

10.1243/pime_proc_1988_202_066_02 ◽

1988 ◽

Vol 202 (3) ◽

pp. 177-184

Author(s):

E T Ososanya ◽

I T Franks

Keyword(s):

Real Time ◽

Computer Technology ◽

Manufacturing Systems ◽

Monitoring Systems ◽

Manufacturing Plant ◽

Considerable Potential ◽

Development System ◽

Plant Operations ◽

On Line ◽

Production Monitoring

Computer technology has given manufacturers the opportunity to monitor, on-line and in real-time, a wide variety of manufacturing systems. Such monitoring systems have considerable potential for expansion and development but need to take account of the special characteristics of particular manufacturing systems and how the information is to be used to best effect. This paper outlines the use of monitoring in the broad context of manufacturing plant operations and describes the design of a development system that will facilitate research into the effective application and improvement of monitoring systems.

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Monitoring of the process of Flash-Butt Welding

Soldagem & Inspeção ◽

10.1590/s0104-92242013000100005 ◽

2013 ◽

Vol 18 (1) ◽

pp. 31-38 ◽

Cited By ~ 3

Author(s):

Yevgenia Chvertko ◽

Mykola Shevchenko ◽

Andriy Pirumov

Keyword(s):

Neural Networks ◽

Real Time ◽

Statistical Methods ◽

Welded Joints ◽

Welding Parameter ◽

Monitoring Systems ◽

Butt Welding ◽

On Line ◽

Welding Processes

Statistical methods of analysis are currently widely used to develop control and monitoring systems for different welding processes. These methods allow to obtain information about the process including effect of all factors on its results, which is often difficult to evaluate due to the complexity of the process. The authors made efforts to apply these methods to develop the system for monitoring the parameters of flash-butt welding in real-time mode. The paper gives brief information about the features of flash-butt welding of reinforcement bars and some basic limitation of this process application. The main reasons of formation of defects in welded joints are given as well as analysis of possibility of application of monitoring systems for their determination. The on-line monitoring system based on neural networks was developed for evaluation of process deviations. This system is believed to be adequate for determination of process violations resulting in disturbances of welding parameter and can be used for prediction of possible defects in the welded joints.

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