DE1046760B - Device for monitoring the windings of electrical machines - Google Patents
Device for monitoring the windings of electrical machinesInfo
- Publication number
- DE1046760B DE1046760B DES49779A DES0049779A DE1046760B DE 1046760 B DE1046760 B DE 1046760B DE S49779 A DES49779 A DE S49779A DE S0049779 A DES0049779 A DE S0049779A DE 1046760 B DE1046760 B DE 1046760B
- Authority
- DE
- Germany
- Prior art keywords
- winding
- conductor
- bars
- conductors
- carrying
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/25—Devices for sensing temperature, or actuated thereby
Description
Einrichtung zur Überwachung der Wicklungen elektrischer Maschinen Bekanntlich tritt bei elektrischen Maschinen für Hochspannung im Laufe einer mehr oder weniger längeren Betriebszeit eine Alterung der Wicklungsisolation, insbesondere der Isolierhülsen der Spulen oder Leiterstäbe ein. Hierbei ergibt sich, daß infolge der Bildung kleiner Hohlräume innerhalb der Isolierung, die unter dem Einfluß auftretender Glimmentladungen sich im Laufe der Zeit vergrößern, die Wärmeabfuhr von den Leitern erheblich verschlechtert wird, wodurch wiederum die Alterungsvorgänge der Wicklung unter Umständen unterstützt oder beschleunigt werden.Device for monitoring the windings of electrical machines It is known that in electrical machines for high voltage occurs in the course of one more or less prolonged operating time, aging of the winding insulation, in particular the insulating sleeves of the coils or conductor bars. It follows that as a result the formation of small voids within the insulation, which occurs under the influence Glow discharges increase in the course of time, the heat dissipation from the conductors is significantly deteriorated, which in turn reduces the aging process of the winding may be supported or accelerated.
Die Erfindung bezieht sich auf die Aufgabe, eine einfache Einrichtung zur Überwachung der Wicklungsisolation von elektrischen Hochspannungsmaschinen zu schaffen, welche es mit einfachen Mitteln gestattet, die zunehmende Alterung der Wicklung zu erfassen und für rechtzeitige Abhilfe gegen das Eintreten schädlicher Zerstörungen zu sorgen. Gemäß der Erfindung wird eine solche Überwachungseinrichtung unter Verwendung von in die Wicklung eingebetteten Temperaturmeßeinrichtungen dadurch geschaffen, daß gleichzeitig an den mit dem Sternpunkt verbundenen Stäben der Wicklung und an den die volle Phasenspannung führenden Leiterstäben der Wicklung Temperaturmeßelemente vorgesehen sind, die es ermöglichen, infolge der Alterung eintretende Temperaturdifferenzen der genannten Leiterstäbe festzustellen. Die erfindungsgemäße Einrichtung beruht darauf, daß die Isolation der am Sternpunkt des Generators liegenden Wicklungsstäbe elektrisch überhaupt nicht beansprucht wird. Infolgedessen können an diesen Leiterstäben die Alterung der Isolierung begleitende und beschleunigende Glimmentladungen nicht eintreten. Infolgedessen ergibt sich, daß eine Beeinträchtigung der Wärmeabfuhr von diesen Leiterstäben entweder gar nicht oder nur in wesentlich geringerem Maße möglich ist als bei den entsprechend der Phasenspannung hoch beanspruchten Leiterstäben der Wicklung, welche die volle Phasenspannung führen und an denen Glimmentladungen auftreten. Das Diagramm der Fig. 1 gibt in Abhängigkeit von der Betriebszeit T in Jahren die Leitertemperaturen für die Sternpunktleiter S bzw. die die volle Phasenspannung führenden Eingangsleiter E wieder. Man erkennt an Hand des genannten Diagramms, daß die Feststellung der Differenz der Temperatur der Sternpunktleiter S und der die volle Phasenspannung führenden Eingangsleiter E es unmittelbar möglich macht, den Alterungszustand festzustellen.The invention relates to the object of a simple device for monitoring the winding insulation of electrical high-voltage machines create, which allows it with simple means, the increasing aging of the Capture winding and timely remedy against the occurrence of harmful To worry about destruction. According to the invention, such a monitoring device thereby using temperature measuring devices embedded in the winding created that at the same time on the bars of the winding connected to the star point and temperature measuring elements on the conductor bars of the winding carrying the full phase voltage are provided that make it possible to deal with temperature differences that occur as a result of aging to determine the said ladder bars. The device according to the invention is based ensure that the insulation of the winding bars located at the star point of the generator is not electrically stressed at all. As a result, these ladder bars The glow discharges accompanying and accelerating the aging of the insulation do not enter. As a result, there is a deterioration in heat dissipation of these conductor bars either not at all or only to a much lesser extent is possible than with the conductor bars, which are highly stressed according to the phase voltage the winding, which carry the full phase voltage and on which glow discharges appear. The diagram in FIG. 1 gives as a function of the operating time T in Years the conductor temperatures for the star point conductor S or the full phase voltage leading entrance ladder E again. You can see from the above diagram, that the determination of the difference in temperature of the star point conductor S and the the input conductor E carrying full phase voltage makes it immediately possible determine the state of aging.
Die Messung der Leitertemperaturen kann durch innerhalb der Isolierhülsen der Spulen oder Leiterstäbe angeordnete Temperaturmeßelemente, z. B. Thermoelemente, erfolgen. An Hand der Fig. 2 und 3 der Zeichnung sollen die Anordnung und der Aufbau einer entsprechenden Meßanordnung näher erläutert werden. In den Fig. 2 und 3 bedeutet 1 den Ständer einer Wechselstrommaschine, z. B. eines Turbogenerators, 2 die in den Nuten der Maschine liegenden Stäbe der Ständerwicklung. Wie bei 3 angedeutet ist, sind innerhalb der Sternpunktleiter bzw. der die volle Phasenspannung führenden Leiter der Wicklung Thermoelemente vorgesehen, deren Meßleiter innerhalb der Nutisolierung verlegt sind und die gemeinsam mit den Leitern durch die Ringleitungen 4 und Dichtungen 5 in dem gasdichten Gehäuse der wasserstoffgekühlten Maschine hindurchgeführt sind. 6 sind Meßinstrumente, die unmittelbar an den abgeführten Sammelschienen bzw. Sternpunktleitern aufgehängt sind, so daß es möglich ist, die Temperaturen der die volle Spannung führenden Leiter bzw. zugeordneter Sternpunktleiter jeder Phasenwicklung zu messen.The measurement of the conductor temperatures can be done inside the insulating sleeve the coils or conductor bars arranged temperature measuring elements, for. B. Thermocouples, take place. With reference to FIGS. 2 and 3 of the drawing, the arrangement and structure are intended a corresponding measuring arrangement are explained in more detail. In Figs. 2 and 3 means 1 the stator of an alternating current machine, e.g. B. a turbo generator, 2 in The bars of the stator winding lying in the grooves of the machine. As indicated at 3 are within the neutral point conductor or those carrying the full phase voltage Head of the winding thermocouples are provided, their measuring conductors within the slot insulation are laid and together with the conductors through the ring lines 4 and seals 5 are passed in the gas-tight housing of the hydrogen-cooled machine. 6 are measuring instruments that are directly connected to the discharged busbars or neutral point conductors are suspended so that it is possible to control the temperatures of the full voltage to measure leading conductor or assigned neutral point conductor of each phase winding.
Grundsätzlich kann selbstverständlich auch die Übertragung der Meßwerte aus den Leiterstäben in anderer Weise erfolgen, als an Hand des Ausführungsbeispiels erläutert wurde.In principle, the measured values can of course also be transmitted take place from the conductor bars in a different way than on the basis of the exemplary embodiment was explained.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES49779A DE1046760B (en) | 1956-07-31 | 1956-07-31 | Device for monitoring the windings of electrical machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES49779A DE1046760B (en) | 1956-07-31 | 1956-07-31 | Device for monitoring the windings of electrical machines |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1046760B true DE1046760B (en) | 1958-12-18 |
Family
ID=7487452
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES49779A Pending DE1046760B (en) | 1956-07-31 | 1956-07-31 | Device for monitoring the windings of electrical machines |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1046760B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3142773A (en) * | 1961-01-19 | 1964-07-28 | Ranco Inc | Electric motor protection means |
US3222555A (en) * | 1962-03-06 | 1965-12-07 | Ranco Inc | Motor protection means for hermetically sealed motor-compressor units |
DE102019218803A1 (en) * | 2019-12-03 | 2021-06-10 | Siemens Aktiengesellschaft | Method for determining the aging of a high voltage device |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE349411C (en) * | 1919-12-16 | 1922-03-02 | Bbc Brown Boveri & Cie | Device for measuring the temperature of stationary windings, in particular high voltage windings, on electrical machines and apparatus |
DE469229C (en) * | 1924-09-20 | 1928-12-06 | Otto Dreyer Dipl Ing | Device for protecting the windings of electrical power consuming or power generating machines and devices against excessive heat |
DE685191C (en) * | 1931-11-11 | 1939-12-13 | Siemens Schuckertwerke Akt Ges | Overload protection device for the winding of electrical machines |
DE737368C (en) * | 1938-08-19 | 1943-07-12 | Sachsenwerk Licht & Kraft Ag | Operation monitoring device for closed, oil-filled electrical high-voltage potential leading apparatus, especially for control switches of transformers |
DE741175C (en) * | 1940-08-01 | 1943-11-05 | Aeg | Device for monitoring electrical apparatus |
AT177180B (en) * | 1952-07-14 | 1954-01-11 | Franz Schwarz | Thermal protection device for electrical machines |
DE918280C (en) * | 1940-02-08 | 1954-09-23 | Siemens Ag | Monitoring device for high voltage parts of electrical devices with machines through light barriers |
DE931967C (en) * | 1940-08-17 | 1955-08-22 | Aeg | Monitoring device for high-voltage devices |
DE939812C (en) * | 1953-04-29 | 1956-03-01 | Torbjoern Nils Magnus Molin | Drains for liquids from closed spaces, especially steam drains |
-
1956
- 1956-07-31 DE DES49779A patent/DE1046760B/en active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE349411C (en) * | 1919-12-16 | 1922-03-02 | Bbc Brown Boveri & Cie | Device for measuring the temperature of stationary windings, in particular high voltage windings, on electrical machines and apparatus |
DE469229C (en) * | 1924-09-20 | 1928-12-06 | Otto Dreyer Dipl Ing | Device for protecting the windings of electrical power consuming or power generating machines and devices against excessive heat |
DE685191C (en) * | 1931-11-11 | 1939-12-13 | Siemens Schuckertwerke Akt Ges | Overload protection device for the winding of electrical machines |
DE737368C (en) * | 1938-08-19 | 1943-07-12 | Sachsenwerk Licht & Kraft Ag | Operation monitoring device for closed, oil-filled electrical high-voltage potential leading apparatus, especially for control switches of transformers |
DE918280C (en) * | 1940-02-08 | 1954-09-23 | Siemens Ag | Monitoring device for high voltage parts of electrical devices with machines through light barriers |
DE741175C (en) * | 1940-08-01 | 1943-11-05 | Aeg | Device for monitoring electrical apparatus |
DE931967C (en) * | 1940-08-17 | 1955-08-22 | Aeg | Monitoring device for high-voltage devices |
AT177180B (en) * | 1952-07-14 | 1954-01-11 | Franz Schwarz | Thermal protection device for electrical machines |
DE939812C (en) * | 1953-04-29 | 1956-03-01 | Torbjoern Nils Magnus Molin | Drains for liquids from closed spaces, especially steam drains |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3142773A (en) * | 1961-01-19 | 1964-07-28 | Ranco Inc | Electric motor protection means |
US3222555A (en) * | 1962-03-06 | 1965-12-07 | Ranco Inc | Motor protection means for hermetically sealed motor-compressor units |
DE102019218803A1 (en) * | 2019-12-03 | 2021-06-10 | Siemens Aktiengesellschaft | Method for determining the aging of a high voltage device |
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