DE10005540A1 - Partial discharge orientation method for transformer involves removing external interference signals from partial discharge signal through localization of partial discharge within transformer - Google Patents
Partial discharge orientation method for transformer involves removing external interference signals from partial discharge signal through localization of partial discharge within transformerInfo
- Publication number
- DE10005540A1 DE10005540A1 DE2000105540 DE10005540A DE10005540A1 DE 10005540 A1 DE10005540 A1 DE 10005540A1 DE 2000105540 DE2000105540 DE 2000105540 DE 10005540 A DE10005540 A DE 10005540A DE 10005540 A1 DE10005540 A1 DE 10005540A1
- Authority
- DE
- Germany
- Prior art keywords
- partial discharge
- signals
- transformer
- partial
- measured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
Abstract
Description
Die TE-Auskopplung erfolgt in der Regel kapazitiv oder induktiv an den Klemmen des Transformators. Die an verschiedenen Klemmen einer Wicklung gemessenen TE-Signale haben bei gleicher TE-Quelle unterschiedliche zeitliche Verläufe, da sie vom Entstehungsort zum Meßort verschiedene Wicklungsabschnitte durchlaufen, wobei das Signal unterschiedliche Verformungen erfährt. Unter der Annahme, dass die Wicklung eines Transformators nahezu gleichmässig aufgebaut ist und dass keine Sättigungserscheinung auftreten, ist die Verformung des Impulses linear von der Länge des durchlaufenen Wicklungsabschnitts abhängig. Wenn nun die Ubertragungsfunktion der Wicklung bekannt ist, kann durch Faltung des gemessenen Signals mit der Übertragungsfunktion einer bestimmten Teilwicklung das Signal am Entstehungsort ermittelt werden. Durch die gleichzeitige Messung der TE-Signale an verschiedenen Klemmen und durch jeweilige Faltung der Übertragungsfunktionen der Teilwicklungen mit den gemessenen TE-Signalen kann die Originalfünktion der TE am Entstehungsort ermittelt werden. Die Übereinstimmung der aus den gemessenen TE-Signalen berechneten Originalfunktionen ist am größten für den wahren Entstehungsort der TE. The TE coupling is usually capacitive or inductive to the Clamping the transformer. The at different terminals of a winding measured TE signals have different temporal for the same TE source Courses, since they differ from the place of origin to the place of measurement Pass through winding sections, the signal being different Undergoes deformations. Assuming that the winding is one Transformer is almost uniformly constructed and that none Appearance of saturation, the deformation of the pulse is linear from the Length of the winding section passed depends. If so Transfer function of the winding is known can by folding the measured signal with the transfer function of a certain Partial winding the signal can be determined at the point of origin. Through the simultaneous measurement of the TE signals at different terminals and by respective convolution of the transfer functions of the partial windings with the measured TE signals can the original function of the TE at the point of origin be determined. The agreement of the from the measured TE signals calculated original functions is greatest for the true place of origin the TE.
Teilentladungsaktivitäten können durch unterschiedliche Methoden (chemisch, akustisch, elektrisch) nachgewiesen werden. Bei räumlich ausgedehnten Anordnungen wie Transformatoren und ähnlichen Hochspannungsgeräten werden die TE-Impulse auf ihrem Weg vom Entstehungsort zum Messpunkt stark verformt, gedämpft und mit den reflektierten TE-Signalen sowie äußeren Störsignalen überlagert, so dass nur in seltenen Fällen und unter großem mess- und rechentechnischem Aufwand eine Ortung der Teilentladungsquelle oder die Trennung von Teilentladungen und Störsignalen möglich ist.Partial discharge activities can be carried out using different methods (chemical, acoustically, electrically). With spatially extended Arrangements such as transformers and similar high voltage devices the TE impulses on their way from the point of origin to the measuring point strongly deformed, damped and with the reflected TE signals as well as external ones Interference signals superimposed, so that only in rare cases and under large and computational effort to locate the partial discharge source or Separation of partial discharges and interference signals is possible.
Die Erfassung und Bewertung von Teilentladungen an räumlich ausgedehnten Anordnungen wie Transformatoren oder ähnlichen Hochspannungsgeräten ist aufgrund der Verformungen der TE-Signale durch die charakteristischen Dämpfungseigenschaften des Prüflings sowie durch die Überlagerung mit äußeren Störsignalen häufig mit großen Schwierigkeiten verbunden. Eine Ortung der TE-Quelle ist nur in seltenen Fällen möglich, aber in jedem Fall sehr aufwendig.The detection and evaluation of partial discharges on spatially extensive Arrangements such as transformers or similar high voltage devices due to the deformation of the TE signals by the characteristic Damping properties of the test object as well as through the overlay with external interference signals are often associated with great difficulties. A Localization of the TE source is only possible in rare cases, but in any case very much complex.
Dem in Anspruch 1 angegebenen Verfahren liegt das Problem zugrunde, die an den Klemmen von Transformatoren oder ähnlichen Hochspannungsgeräten gemessenen Teilentladungssignale auf einen Entstehungsort zurückzuführen und die TE-Signale von den äußeren Störsignalen zu trennen.The method specified in claim 1 is based on the problem the terminals of transformers or similar high-voltage devices measured partial discharge signals to a place of origin and to separate the TE signals from the external interference signals.
Die mit dem Verfahren erzielte Verbesserung gegenüber dem Stand der Technik besteht insbesondere darin, dass durch die Einbeziehung von den für das Gerät charakteristischen Übertragungsfunktionen eine Ermittlung der TE-Quelle ermöglicht wird. Dadurch kann eine Trennung der TE- und Störsignale erreicht werden. Weiterhin können die Einflüsse der Dämpfung und Verzerrung der TE- Signale infolge von Wicklungsparametern korrigiert bzw. eliminiert werden.The improvement achieved with the method compared to the prior art in particular, is that by including those for the device characteristic transfer functions a determination of the TE source is made possible. This enables the TE and interference signals to be separated become. Furthermore, the effects of damping and distortion of the TE Signals are corrected or eliminated due to winding parameters.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2000105540 DE10005540A1 (en) | 2000-02-08 | 2000-02-08 | Partial discharge orientation method for transformer involves removing external interference signals from partial discharge signal through localization of partial discharge within transformer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2000105540 DE10005540A1 (en) | 2000-02-08 | 2000-02-08 | Partial discharge orientation method for transformer involves removing external interference signals from partial discharge signal through localization of partial discharge within transformer |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10005540A1 true DE10005540A1 (en) | 2001-08-09 |
Family
ID=7630225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2000105540 Withdrawn DE10005540A1 (en) | 2000-02-08 | 2000-02-08 | Partial discharge orientation method for transformer involves removing external interference signals from partial discharge signal through localization of partial discharge within transformer |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10005540A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7285960B2 (en) | 2003-05-09 | 2007-10-23 | Siemens Aktiengesellschaft | Measuring device, and method for locating a partial discharge |
DE102007015490B3 (en) * | 2007-03-30 | 2008-09-11 | Hochschule Bremen | Method for measuring partial discharge in high voltage component, involves interconnecting series connection of capacitance with one or more inductances to electrical resonant circuit by laminated series connection of capacitances |
WO2020084058A1 (en) * | 2018-10-26 | 2020-04-30 | Maschinenfabrik Reinhausen Gmbh | State analysis of an electrical operating resource |
-
2000
- 2000-02-08 DE DE2000105540 patent/DE10005540A1/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7285960B2 (en) | 2003-05-09 | 2007-10-23 | Siemens Aktiengesellschaft | Measuring device, and method for locating a partial discharge |
DE102007015490B3 (en) * | 2007-03-30 | 2008-09-11 | Hochschule Bremen | Method for measuring partial discharge in high voltage component, involves interconnecting series connection of capacitance with one or more inductances to electrical resonant circuit by laminated series connection of capacitances |
WO2020084058A1 (en) * | 2018-10-26 | 2020-04-30 | Maschinenfabrik Reinhausen Gmbh | State analysis of an electrical operating resource |
CN112912741A (en) * | 2018-10-26 | 2021-06-04 | 赖茵豪森机械制造公司 | State evaluation of an electrical operating device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8122 | Nonbinding interest in granting licences declared | ||
8139 | Disposal/non-payment of the annual fee |