EPE Association: EPE 2005 - Topic 16-2a

EPE 2005 - Topic 16-2a - DS: Diagnostic
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 16: OPERATING QUALITY OF SYSTEMS > EPE 2005 - Topic 16-2a - DS: Diagnostic

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   A Comparative Study on Effective Signal Processing Tools for Power Quality Monitoring
By SOONG Wen; ERTUGRUL Nesimi; GARGOOM Ameen [View]
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Abstract: Due to the growing number of sources of disturbances in AC power systems; there is an ever increasing need for power quality monitoring systems. However, for an accurate analysis, a large amount of data is required in such systems, and there is a need for improvements to analyse the captured data automatically. Therefore, the signals obtained from such monitoring systems require further processing to be able to distinguish the type of disturbances. This paper investigates the efficiency of various signal-processing techniques in detecting and extracting the features of power quality signals. The paper utilizes real time signals in a power system and offers a new technique to monitor all three-phase signals simultaneously, which eliminates the limitations of the existing single-phase based analysis techniques.

   Estimation of the Data Transfer Requirements of Vibration and Temperature Measurements in Induction Motor Condition Monitoring
By AHOLA Jero; TIAINEN Risto; LINDH Tuomo; SARKIMAKI Ville [View]
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Abstract: Continuous condition monitoring requires data transmission from the sensors to a higher level where the analyses and decisions are made. In this paper, the amounts of data produced by vibration and temperature measurements of the condition monitoring of induction machines are estimated. The effect of communication protocols to the data transmission capacity requirements is analysed.

   Monitoring system for the diagnostic of sparking in doubly-fed induction generators
By HOFMANN W.; WUERFEL Matthias [View]
[Download]

Abstract: A diagnostic strategy for the monitoring of the transmission properties and sparking of doubly-fed induction generators with slip rings is introduced in this paper. Modifications in the transmission properties can be recognized by measurement and evaluation of the rotor currents without additional sensors. The existing current transformers in the system can be used for the diagnostic.

   Prony’s Method versus FFT for Analyzing Power Converters Signals
By COSTA Fabiano; ALMEIDA Luiz; FERNANDES Darlan; NAIDU S. R. [View]
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Abstract: This paper compares the Prony's method and the Fast Fourier Transform (FFT), for analyzing signals of power electronic devices, particularly power converters. The theoretical features of both techniques are analyzed and their differences are highlighted. The two techniques have been applied to synthetic signals that emulate converter signals. The results show that Prony is a good alternative when one is dealing with short-time windows of analyzed signals although is sensitive to noise.

   Reliability Analysis of Safety Systems Using Markov-Chain Modelling
By WINKOVICH Thomas; ECKARDT Dieter [View]
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Abstract: As the new standard IEC 61508 was introduced it is now required that systems with implemented functional safety are quantified regarding to their probability of failure. Therefore, a modelling using Markov-Chains can be carried out to evaluate the probability of dangerous failures. The modelling of the appropriate Markov-Chain is shown and discussed in this paper.

EPE 2005 - Topic 16-2a - DS: Diagnostic
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 16: OPERATING QUALITY OF SYSTEMS > EPE 2005 - Topic 16-2a - DS: Diagnostic
	[return to parent folder]

	A Comparative Study on Effective Signal Processing Tools for Power Quality Monitoring By SOONG Wen; ERTUGRUL Nesimi; GARGOOM Ameen	[View] [Download]
Abstract: Due to the growing number of sources of disturbances in AC power systems; there is an ever increasing need for power quality monitoring systems. However, for an accurate analysis, a large amount of data is required in such systems, and there is a need for improvements to analyse the captured data automatically. Therefore, the signals obtained from such monitoring systems require further processing to be able to distinguish the type of disturbances. This paper investigates the efficiency of various signal-processing techniques in detecting and extracting the features of power quality signals. The paper utilizes real time signals in a power system and offers a new technique to monitor all three-phase signals simultaneously, which eliminates the limitations of the existing single-phase based analysis techniques.

	Estimation of the Data Transfer Requirements of Vibration and Temperature Measurements in Induction Motor Condition Monitoring By AHOLA Jero; TIAINEN Risto; LINDH Tuomo; SARKIMAKI Ville	[View] [Download]
Abstract: Continuous condition monitoring requires data transmission from the sensors to a higher level where the analyses and decisions are made. In this paper, the amounts of data produced by vibration and temperature measurements of the condition monitoring of induction machines are estimated. The effect of communication protocols to the data transmission capacity requirements is analysed.

	Monitoring system for the diagnostic of sparking in doubly-fed induction generators By HOFMANN W.; WUERFEL Matthias	[View] [Download]
Abstract: A diagnostic strategy for the monitoring of the transmission properties and sparking of doubly-fed induction generators with slip rings is introduced in this paper. Modifications in the transmission properties can be recognized by measurement and evaluation of the rotor currents without additional sensors. The existing current transformers in the system can be used for the diagnostic.

	Prony’s Method versus FFT for Analyzing Power Converters Signals By COSTA Fabiano; ALMEIDA Luiz; FERNANDES Darlan; NAIDU S. R.	[View] [Download]
Abstract: This paper compares the Prony's method and the Fast Fourier Transform (FFT), for analyzing signals of power electronic devices, particularly power converters. The theoretical features of both techniques are analyzed and their differences are highlighted. The two techniques have been applied to synthetic signals that emulate converter signals. The results show that Prony is a good alternative when one is dealing with short-time windows of analyzed signals although is sensitive to noise.

	Reliability Analysis of Safety Systems Using Markov-Chain Modelling By WINKOVICH Thomas; ECKARDT Dieter	[View] [Download]
Abstract: As the new standard IEC 61508 was introduced it is now required that systems with implemented functional safety are quantified regarding to their probability of failure. Therefore, a modelling using Markov-Chains can be carried out to evaluate the probability of dangerous failures. The modelling of the appropriate Markov-Chain is shown and discussed in this paper.