WO1997006590A1 - Device for compensating harmonic oscillation currents in a transmission line consisting of several conductors - Google Patents

Device for compensating harmonic oscillation currents in a transmission line consisting of several conductors Download PDF

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Publication number
WO1997006590A1
WO1997006590A1 PCT/DE1996/001412 DE9601412W WO9706590A1 WO 1997006590 A1 WO1997006590 A1 WO 1997006590A1 DE 9601412 W DE9601412 W DE 9601412W WO 9706590 A1 WO9706590 A1 WO 9706590A1
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Prior art keywords
active filter
transmission path
conductors
conductor
voltage
Prior art date
Application number
PCT/DE1996/001412
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German (de)
French (fr)
Inventor
Diana Ozelame Lunelli
Kadry Sadek
Marcos-Antonio Pereira
Original Assignee
Siemens Aktiengesellschaft
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Publication of WO1997006590A1 publication Critical patent/WO1997006590A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/01—Arrangements for reducing harmonics or ripples
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40—Arrangements for reducing harmonics

Definitions

  • the invention relates to a device for compensating harmonic currents of a transmission path consisting of several conductors.
  • An electrical transmission path consisting of several conductors can cause interference with another electrical device, such as data and / or telephone lines. These disturbances are caused by the harmony of all conductors on the transmission link, i.e. the transmission link as a whole causes the interference.
  • Active filters are from IEEE Trans, on Ind. Appl., Vol. IA-22, No. 3, May / June 1986, pages 460 to 465. Several embodiments of an active filter are described in this publication.
  • the invention is based on the object, the effort and the costs for a device for compensating upper reduce vibration currents ⁇ of an electrical transmission path consisting of several conductors.
  • a particularly simple embodiment of the device according to the invention consists in that the earth cable present in the transmission link is used as the voltage-free conductor, which is electrically insulated from the masts of the transmission link by means of insulators, with a spark gap being connected electrically in parallel with at least one insulator per mast. This results in a conductor running along the transmission path, in which the compensation current generated by the active filter flows, as a result of which the conductors in the
  • a cable screen is used as the voltage-free conductor if a multi-core cable is used as the transmission path. This arrangement does not use isolators and spark gaps.
  • the electrical transmission path becomes neutral with respect to other electrical devices.
  • a control signal for the active filter is generated by means of a device which is connected on the input side to measuring devices of the conductors of the transmission link, in the simplest case these measured current values are added vectorially or a measuring device is used which already has the sum which can detect harmonic currents of all conductors in the transmission link.
  • a transmission link has two earth cables, then two active filters are also required, each of which feeds a compensation current into a earth cable.
  • the measured current values are then multiplied using weighting factors. These weighting factors take into account the spatial arrangement of the individual conductors of the transmission link with respect to one another and in relation to the electrical devices, such as data and telephone lines, which are exposed to the interference. The more complex the transmission path, the more complex the device for generating at least one control signal.
  • FIG. 1 shows a first embodiment of the device according to the invention, with FIGS. 2 to 4 each representing a further embodiment of the device according to the invention.
  • 2 denotes a transmission link which has three conductors A, B and C and an earth rope ESI.
  • a measuring device 4 is assigned to each conductor A to C, with a conductor current iA, iB and iC is measured in each case.
  • These measuring devices 4 are each linked to an input of a device 6 for generating a control signal U Q for a subsequent active filter 8, which is connected in an electrically conductive manner on the output side to the earth rope ESI.
  • the earth rope ESI which is voltage-free in normal operation, is electrically insulated from a mast 14 of the transmission link 2 by means of insulators 10 and 12.
  • a spark gap 16 is electrically connected in parallel to at least one of the isolators 10 and 12, only one of which is shown in this figure.
  • the individual earth ropes ESI are electrically conductively connected to one another by means of a bridging line 18, so that there is a continuous, parallel line to the conductors A, B and C of the transmission link 2.
  • the spark gap 16 bridges the insulators 10 and 12 when lightning strikes, so that the earth cable ESI is grounded.
  • the active filter 8 is also connected to ground potential via a protective device 20. Discharge conductors or semiconductor components can be used as protective device 20. This protective device prevents damage to the components of the active filter 8 in the event of a lightning strike before the overvoltage is reduced via the spark gap 16.
  • the protective device 20 is therefore located directly at the output of the active filter 8.
  • the device 6 for generating the control signal U Q of the active filter 8 has a vectorial addition point at whose output the control signal U Q is the vectorial sum of the harmonic currents to be compensated.
  • An harmonic measuring device can also be used as the device 6, which can already detect this sum of all harmonic currents from all conductors A, B and C of the transmission link 2.
  • the device 6 is designed as a measured value weighting device.
  • This measured value weighting device can also be referred to as a combination matrix device, since the measured conductor currents iA, iB and iC are weighted with weighting factors AI, Bl and Cl, these weighting factors reflecting the spatial arrangement of the individual conductors A, B and C in relation to one another and with regard to the devices exposed to the interference, for example data and / or telephone lines.
  • the matrix equation which is implemented by means of the device 6, can be seen in FIG. 1. This processing of the measurement signals iA, iB and iC applies to a transmission link 2 with an earth rope ESI and three conductors A, B and C.
  • the active filter 8 Depending on this generated control signal U Q , the active filter 8 generates a compensation current iKomp at its output, which is fed into the earth rope ESI.
  • this compensation current iKomp the interference of the transmission link 2 as a whole is compensated for, for example, data and / or telephone lines.
  • FIGS 2 and 3 show two possible embodiments of the conductor arrangement of a transmission link 2 on a mast 14, each with two earth ropes ESI and ES2.
  • An active filter 8 is provided for each, for the control signal U G1 or U Q 2 of which the influence of each individual conductor A, B and C or a, b and c is weighted separately.
  • the weighting factors AI, Bl, Cl, A2, B2 and C2 or Al, ..., C2 and al, ..., c2 also contain the influence on a communication line running in the interference area.
  • FIG. 4 shows an example of an industrial application, in which a cable 22 is used for the electrical transmission link 2.
  • the output of the active filter 8 is electrically connected with a cable shield 24. trically linked.
  • the output of this active filter 8 can also be electrically conductively connected to a grounding wire or an additional wire.
  • the harmonic compensation is not absolutely necessary over the entire transmission route 2.
  • the interference of the harmonics decreases with increasing distance from their source along the transmission path 2, so that compensation is not required everywhere.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention relates to a device for compensating harmonic oscillation currents in a transmission line (2) consisting of several conductors (A, B, C). According to the invention, the device consists of at least one active filter (8) and a device (6) for generating a control signal (UG) for the active filter (8), in which said device (6) is connected on the input side to a measuring device (4) for the conductors (A, B, C) in the electrical transmission line (2) and on the output side to at least one active filter (8) and each active filter (8) is connected on the output side to a conductor (ES1, ES2) which is at zero voltage during normal operation. The complexity and cost of compensating harmonic oscillation currents by means of an active filter are considerably reduced.

Description

Beschreibungdescription
Vorrichtung zur Kompensation von Oberschwingungsströmen einer aus mehreren Leitern bestehenden ÜbertragungsstreckeDevice for compensating harmonic currents of a transmission path consisting of several conductors
Die Erfindung bezieht sich auf eine Vorrichtung zur Kompensa¬ tion von Oberschwingungsströmen einer aus mehreren Leitern bestehenden Übertragungsstrecke.The invention relates to a device for compensating harmonic currents of a transmission path consisting of several conductors.
Eine aus mehreren Leitern bestehende elektrische Übertra¬ gungsstrecke kann auf eine andere elektrische Einrichtung, wie beispielsweise Daten- und/oder Telefonleitungen, Störun¬ gen verursachen. Dabei werden diese Störungen durch Harmoni- sehe aller Leiter der Übertragungsstrecke verursacht, d.h., die Übertragungsstrecke als Ganzes bewirkt die Störung.An electrical transmission path consisting of several conductors can cause interference with another electrical device, such as data and / or telephone lines. These disturbances are caused by the harmony of all conductors on the transmission link, i.e. the transmission link as a whole causes the interference.
Aus dem Tagungsband CIGRE Colloquium on Power System EMC, 26.05.1995, ist bekannt, zur Oberschwingungskompensation in einer elektrischen Übertragungsstrecke aktive Filter zu ver¬ wenden. Dabei wird für jeden Leiter dieser Übertragungsstrek- ke ein aktives Filter vorgesehen. Diese aktiven Filter müssen zur Spannungsanpassung über spezielle Kopplungselemente, bei¬ spielsweise Kondensatoren und/oder Transformatoren, an die einzelnen Leiter angeschlossen werden. Der Aufwand und dieFrom the conference proceedings CIGRE Colloquium on Power System EMC, May 26, 1995, it is known to use active filters for harmonic compensation in an electrical transmission path. An active filter is provided for each conductor of this transmission path. These active filters have to be connected to the individual conductors for voltage adaptation via special coupling elements, for example capacitors and / or transformers. The effort and the
Kosten solcher Kopplungselemente sind besonders für Hochspan¬ nungsanwendungen sehr hoch.The cost of such coupling elements is very high, especially for high-voltage applications.
Aktive Filter sind aus der IEEE Trans, on Ind. Appl., Vol. IA-22, No. 3, May/June 1986, Seiten 460 bis 465, bekannt. In dieser Veröffentlichung werden mehrere Ausführungsformen eines aktiven Filters beschrieben.Active filters are from IEEE Trans, on Ind. Appl., Vol. IA-22, No. 3, May / June 1986, pages 460 to 465. Several embodiments of an active filter are described in this publication.
Der Erfindung liegt nun die Aufgabe zugrunde, den Aufwand und die Kosten für eine Vorrichtung zur Kompensation von Ober- schwingungsströmeή einer aus mehreren Leitern bestehenden elektrischen Übertragungsstrecke zu reduzieren.The invention is based on the object, the effort and the costs for a device for compensating upper reduce vibration currentsή of an electrical transmission path consisting of several conductors.
Diese Aufgabe wird erfindungsgemäß gelöst mit den Merkmalen des Anspruchs 1.This object is achieved according to the invention with the features of claim 1.
Dadurch, daß nur noch ein aktives Filter direkt ohne ein Kopplungselement an einem im Normalbetrieb spannungsfreien Leiter der Übertragungsstrecke angeschlossen wird, reduzieren sich der Aufwand und die Kosten erheblich.The fact that only an active filter is connected directly without a coupling element to a conductor of the transmission link that is voltage-free in normal operation reduces the effort and the costs considerably.
Eine besonders einfache Ausführungsform der erfindungsgemäßen Vorrichtung besteht darin, daß als spannungsfreier Leiter das in der Übertragungsstrecke vorhandene Erdseil verwendet wird, das mittels Isolatoren von den Masten der Übertragungsstrecke elektrisch isoliert ist, wobei bei mindestens einem Isolator je Mast eine Funkenstrecke elektrisch parallel geschaltet ist. Dadurch erhält man einen entlang der Übertragungsstrecke verlaufenden Leiter, in dem der vom aktiven Filter generierte Kompensationsstrom fließt, wodurch die in den Leitern derA particularly simple embodiment of the device according to the invention consists in that the earth cable present in the transmission link is used as the voltage-free conductor, which is electrically insulated from the masts of the transmission link by means of insulators, with a spark gap being connected electrically in parallel with at least one insulator per mast. This results in a conductor running along the transmission path, in which the compensation current generated by the active filter flows, as a result of which the conductors in the
Übertragungsstrecke fließenden und außerhalb dieser übertra¬ gungsstrecke wirkenden Oberschwingungsströme kompensiert wer¬ den.Harmonic currents flowing and acting outside of this transmission path are compensated for.
Bei einer weiteren einfachen Ausführungsform der erfindungs¬ gemäßen Vorrichtung wird als spannungsfreier Leiter ein Ka¬ belschirm verwendet, wenn als Übertragungsstrecke ein mehr¬ adriges Kabel verwendet wird. Bei dieser Anordnung werden keine Isolatoren und Funkenstrecken benutzt.In a further simple embodiment of the device according to the invention, a cable screen is used as the voltage-free conductor if a multi-core cable is used as the transmission path. This arrangement does not use isolators and spark gaps.
Dadurch, daß der generierte Kompensationsstrom in dem Erdseil oder in dem Schirmkabel fließt, wird die elektrische Übertra¬ gungsstrecke gegenüber anderen elektrischen Einrichtungen neutral. Bei der Generierung eines Steuersignals für den aktiven Fil¬ ter mittels einer Einrichtung, die eingangsseitig mit Meßein¬ richtungen der Leiter der Übertragungsstrecke verbunden ist, werden im einfachsten Fall diese gemessenen Stromwerte vek- toriell addiert oder es wird eine Meßeinrichtung verwendet, die bereits die Summe der Oberschwingungsströme aller Leiter der Übertragungsstrecke erfassen kann.Because the generated compensation current flows in the earth cable or in the shielding cable, the electrical transmission path becomes neutral with respect to other electrical devices. When a control signal for the active filter is generated by means of a device which is connected on the input side to measuring devices of the conductors of the transmission link, in the simplest case these measured current values are added vectorially or a measuring device is used which already has the sum which can detect harmonic currents of all conductors in the transmission link.
Weist eine Übertragungsstrecke zwei Erdseile auf, so werden auch zwei aktive Filter benötigt, die jeweils einen Kompen- sationεstrom in ein Erdseil einspeisen. Zur Generierung der Steuersignale für die beiden aktiven Filter werden nun die gemessenen Stromwerte mittels Gewichtungsfaktoren multipli¬ ziert. Diese Gewichtungsfaktoren berücksichtigen die räumli- ehe Anordnung der einzelnen Leiter der Übertragungsstrecke zueinander und im Bezug auf die den Störeinflüssen ausge¬ setzten elektrischen Einrichtungen, wie Daten- und Telefon¬ leitungen. Je komplexer die Übertragungsstrecke ist, umso aufwendiger ist die Einrichtung zur Generierung wenigstens eines Steuersignals.If a transmission link has two earth cables, then two active filters are also required, each of which feeds a compensation current into a earth cable. To generate the control signals for the two active filters, the measured current values are then multiplied using weighting factors. These weighting factors take into account the spatial arrangement of the individual conductors of the transmission link with respect to one another and in relation to the electrical devices, such as data and telephone lines, which are exposed to the interference. The more complex the transmission path, the more complex the device for generating at least one control signal.
Zur weiteren Erläuterung der Erfindung wird auf die Zeichnung Bezug genommen, in der mehrere Ausführungsbeispiele der Vor¬ richtung zur Kompensation von Oberschwingungsströmen einer aus mehreren Leitern bestehenden elektriεchen Übertragungs- strecke schematisch veranschaulicht sind.To further explain the invention, reference is made to the drawing, in which several exemplary embodiments of the device for compensating harmonic currents of an electrical transmission path consisting of several conductors are schematically illustrated.
Figur 1 zeigt eine erste Ausführungsform der erfin¬ dungsgemäßen Vorrichtung, wobei die Figuren 2 bis 4 jeweils eine weitere Ausführungsform der er¬ findungsgemäßen Vorrichtung darstellen.FIG. 1 shows a first embodiment of the device according to the invention, with FIGS. 2 to 4 each representing a further embodiment of the device according to the invention.
In der Figur 1 ist mit 2 eine Übertragungsstrecke bezeichnet, die drei Leiter A, B und C und ein Erdseil ESI aufweisen. Je- dem Leiter A bis C ist eine Meßeinrichtung.4 zugeordnet, mit der jeweils ein Leiterstrom iA, iB und iC gemessen wird. Die¬ se Meßeinrichtungen 4 sind jeweils mit einem Eingang einer Einrichtung 6 zur Generierung eines Steuersignals UQ für einen nachfolgenden aktiven Filter 8, der ausgangsseitig mit dem Erdseil ESI elektrisch leitend verbunden ist, verknüpft. Das Erdseil ESI, das im Normalbetrieb spannungsfrei ist, ist mittels Isolatoren 10 und 12 von einem Masten 14 der Übertra¬ gungsstrecke 2 elektrisch isoliert. Mindestens einem der Iso¬ latoren 10 und 12 ist eine Funkenstrecke 16 elektrisch paral- Iel geschaltet, von denen in dieser Figur nur eine darge¬ stellt ist. Mittels einer Überbrückungsleitung 18 sind die einzelnen Erdseile ESI untereinander elektrisch leitend ver¬ bunden, so daß eine durchgehende, parallele Leitung zu den Leitern A, B und C der Übertragungsstrecke 2 vorhanden ist. Die Funkenstrecke 16 überbrückt bei Blitzeinschlag die Isola¬ toren 10 und 12, so daß das Erdseil ESI geerdet ist. Das ak¬ tive Filter 8 ist ausgangsseitig außerdem über eine Schutz¬ einrichtung 20 mit Massepotential verbunden. Als Schutzein¬ richtung 20 können Ableiter oder Halbleiterbauelemente ver- wendet werden. Diese Schutzeinrichtung verhindert, daß bei einem Blitzeinschlag eine Beschädigung der Komponenten des aktiven Filters 8 erfolgen kann, bevor die Überspannung über die Funkenstrecke 16 abgebaut wird. Deshalb liegt die Schutz¬ einrichtung 20 unmittelbar am Ausgang des aktiven Filters 8.In FIG. 1, 2 denotes a transmission link which has three conductors A, B and C and an earth rope ESI. A measuring device 4 is assigned to each conductor A to C, with a conductor current iA, iB and iC is measured in each case. These measuring devices 4 are each linked to an input of a device 6 for generating a control signal U Q for a subsequent active filter 8, which is connected in an electrically conductive manner on the output side to the earth rope ESI. The earth rope ESI, which is voltage-free in normal operation, is electrically insulated from a mast 14 of the transmission link 2 by means of insulators 10 and 12. A spark gap 16 is electrically connected in parallel to at least one of the isolators 10 and 12, only one of which is shown in this figure. The individual earth ropes ESI are electrically conductively connected to one another by means of a bridging line 18, so that there is a continuous, parallel line to the conductors A, B and C of the transmission link 2. The spark gap 16 bridges the insulators 10 and 12 when lightning strikes, so that the earth cable ESI is grounded. On the output side, the active filter 8 is also connected to ground potential via a protective device 20. Discharge conductors or semiconductor components can be used as protective device 20. This protective device prevents damage to the components of the active filter 8 in the event of a lightning strike before the overvoltage is reduced via the spark gap 16. The protective device 20 is therefore located directly at the output of the active filter 8.
Die Einrichtung 6 zur Generierung des Steuersignals UQ des aktiven Filters 8 weist im einfachsten Fall eine vektorielle Additionsstelle auf, an deren Ausgang als Steuersignal UQ die vektorielle Summe der zu kompensierenden Oberschwingungsströ- me ansteht. Es kann auch eine Oberschwingungs-Meßeinrichtung als Einrichtung 6 verwendet werden, die bereits diese Summe aller Oberschwingungsströme von allen Leitern A, B und C der Übertragungsstrecke 2 erfassen kann. Für komplexere Gebilde der Leiter A, B, C und ESI im Bezug auf eine Kommunikations- leitung, die aus Ubersichtlichkeitsgründen nicht dargestellt ist, ist die Einrichtung 6 als Meßwertgewichtungs-Einrichtung ausgebildet. Diese Meßwertgewichtungs-Einrichtung kann auch als Kombinationsmatrix-Einrichtung bezeichnet werden, da die gemessenen Leiterströme iA, iB und iC mit Gewichtungsfaktoren AI, Bl und Cl gewichtet werden, wobei diese Gewichtungsfakto¬ ren die räumliche Anordnung der einzelnen Leiter A, B und C zueinander und im Bezug auf die den Störeinflüssen ausgeset¬ zten Einrichtungen, beispielsweise Daten- und/oder Telefon¬ leitungen, berücksichtigen. Die Matrixgleichung, die mittels der Einrichtung 6 realisiert wird, ist der Figur 1 zu entneh¬ men. Diese Bearbeitung der Meßsignale iA, iB und iC gilt für eine Übertragungsstrecke 2 mit einem Erdseil ESI und drei Leitern A, B und C.In the simplest case, the device 6 for generating the control signal U Q of the active filter 8 has a vectorial addition point at whose output the control signal U Q is the vectorial sum of the harmonic currents to be compensated. An harmonic measuring device can also be used as the device 6, which can already detect this sum of all harmonic currents from all conductors A, B and C of the transmission link 2. For more complex structures of conductors A, B, C and ESI in relation to a communication line, which are not shown for reasons of clarity is, the device 6 is designed as a measured value weighting device. This measured value weighting device can also be referred to as a combination matrix device, since the measured conductor currents iA, iB and iC are weighted with weighting factors AI, Bl and Cl, these weighting factors reflecting the spatial arrangement of the individual conductors A, B and C in relation to one another and with regard to the devices exposed to the interference, for example data and / or telephone lines. The matrix equation, which is implemented by means of the device 6, can be seen in FIG. 1. This processing of the measurement signals iA, iB and iC applies to a transmission link 2 with an earth rope ESI and three conductors A, B and C.
In Abhängigkeit dieses generierten Steuersignals UQ erzeugt der aktive Filter 8 an seinem Ausgang einen Kompensations¬ strom iKomp, der in das Erdseil ESI eingespeist wird. Mittels dieses Kompensationsstromes iKomp werden die Störeinflüsse der Übertragungsstrecke 2 als Ganzes auf beispielsweise Daten- und/oder Telefonleitungen kompensiert.Depending on this generated control signal U Q , the active filter 8 generates a compensation current iKomp at its output, which is fed into the earth rope ESI. By means of this compensation current iKomp, the interference of the transmission link 2 as a whole is compensated for, for example, data and / or telephone lines.
Die Figuren 2 und 3 zeigen zwei mögliche Ausführungsformen der Leiteranordnung einer Übertragungsstrecke 2 auf einem Masten 14 mit jeweils zwei Erdseilen ESI und ES2. Für jedes ist ein aktiver Filter 8 vorgesehen, für dessen Steuersignal UG1 bzw. UQ2 der Einfluß jedes einzelnen Leiters A, B und C bzw. a, b und c gesondert gewichtet wird. Die Gewichtungs- faktoren AI, Bl, Cl, A2, B2 und C2 bzw. Al,...,C2 und al, ... ,c2 enthalten auch den Einfluß auf eine im Störbereich verlaufende Kommunikationsleitung.Figures 2 and 3 show two possible embodiments of the conductor arrangement of a transmission link 2 on a mast 14, each with two earth ropes ESI and ES2. An active filter 8 is provided for each, for the control signal U G1 or U Q 2 of which the influence of each individual conductor A, B and C or a, b and c is weighted separately. The weighting factors AI, Bl, Cl, A2, B2 and C2 or Al, ..., C2 and al, ..., c2 also contain the influence on a communication line running in the interference area.
Die Figur 4 zeigt ein Beispiel einer industriellen Anwendung, wobei ein Kabel 22 für die elektrische Übertragungsstrecke 2 verwendet wird. Bei der Verwendung eines Kabels 22 wird der Ausgang des aktiven Filters 8 mit einem Kabelschirm 24 elek- trisch leitend verknüpft. Der Ausgang dieses aktiven Filters 8 kann auch mit einer Erdungsader oder mit einer zusätzlichen Ader elektrisch leitend verbunden werden.FIG. 4 shows an example of an industrial application, in which a cable 22 is used for the electrical transmission link 2. When using a cable 22, the output of the active filter 8 is electrically connected with a cable shield 24. trically linked. The output of this active filter 8 can also be electrically conductively connected to a grounding wire or an additional wire.
Falls nicht entlang der gesamten Strecke 2 elektrische Ein¬ richtungen vorhanden sind, die gestört werden können, ist die Oberschwingungskompensation nicht unbedingt auf der ganzen Übertragungsstrecke 2 nötig. Außerdem läßt der Störeinfluß der Oberwellen mit steigendem Abstand von deren Quelle längs der Übertragungsstrecke 2 nach, so daß nicht überall eine Kompensation erforderlich ist. If there are no electrical devices along the entire route 2 which can be disturbed, the harmonic compensation is not absolutely necessary over the entire transmission route 2. In addition, the interference of the harmonics decreases with increasing distance from their source along the transmission path 2, so that compensation is not required everywhere.

Claims

Patentansprüche claims
1. Vorrichtung zur Kompensation von Oberschwingungsströmen einer aus mehreren Leitern (A,B,C) bestehenden elektrischen Übertragungsstrecke (2), bestehend aus wenigstens einem akti¬ ven Filter (8) und einer Einrichtung (6) zur Generierung eines Steuersignals (UQ,UQ-L,UQ2) für den aktiven Filter (8), wobei diese Einrichtung (6) eingangsseitig jeweils mit einer Meßeinrichtung (4) der Leiter (A,B,C) der elektrischen Über- tragungsstrecke (2) und ausgangsseitig mit wenigstens einem aktiven Filter (8) und jeder aktive Filter (8) ausgangsseitig mit einem im Normalbetrieb spannungsfreien Leiter der Über¬ tragungsstrecke (2) verbunden ist.1. Device for compensating harmonic currents of an electrical transmission path (2) consisting of several conductors (A, B, C), consisting of at least one active filter (8) and a device (6) for generating a control signal (UQ, UQ -L, U Q 2) for the active filter (8), this device (6) on the input side with a measuring device (4) of the conductors (A, B, C) of the electrical transmission path (2) and on the output side with at least an active filter (8) and each active filter (8) is connected on the output side to a conductor of the transmission link (2) which is voltage-free in normal operation.
2. Vorrichtung nach Anspruch 1, wobei als spannungsfreier Leiter ein Erdseil (ES1,ES2) der Übertragungsstrecke (2) ver¬ wendet wird, das von einem Masten (14) der Übertragungsstrek- ke (2) elektrisch isoliert ist, wobei mindestens einem Isola¬ tor (10,12) eine Funkenstrecke (16) elektrisch parallel ge- schaltet ist.2. Device according to claim 1, wherein a ground cable (ES1, ES2) of the transmission path (2) is used as the voltage-free conductor, which is electrically insulated from a mast (14) of the transmission path (2), at least one isola ¬ gate (10,12) a spark gap (16) is electrically connected in parallel.
3. Vorrichtung nach Anspruch 1, wobei als spannungsfreier Leiter ein Kabelschirm (24) der Übertragungsstrecke (2) ver¬ wendet wird.3. Device according to claim 1, wherein a cable shield (24) of the transmission path (2) is used as the voltage-free conductor.
4. Vorrichtung nach Anspruch 1, wobei als spannungsfreier Leiter eine Erdungsader der Übertragungsstrecke (2) verwendet wird.4. The device according to claim 1, wherein an earth wire of the transmission link (2) is used as the voltage-free conductor.
5. Vorrichtung nach Anspruch 1, wobei alε Einrichtung (6) zur Generierung eines Steuersignalε (UQ,UQ]_,UQ2) für den ak¬ tiven Filter (8) ein Oberschwingungεmeßgerät verwendet wird.5. The device according to claim 1, wherein a device (6) for generating a control signal (U Q , UQ] _, UQ2) for the active filter (8) uses a harmonic measuring device.
6. Vorrichtung nach Anεpruch 1, wobei alε Einrichtung (6) zur Generierung eines Steuerεignalε (UQ,UQI.,UQ2) für den ak- tiven Filter (8) eine Meßwertgewichtungε-Einrichtung verwen¬ det wird.6. Device according to claim 1, wherein the device (6) for generating a control signal (U Q , UQI., UQ2) for the ac tive filter (8) a measured value weighting device is used.
7. Vorrichtung nach Anεpruch 1, wobei der aktive Filter (8) auεgangsseitig mit einer Schutzeinrichtung (20) versehen ist. 7. Device according to claim 1, the active filter (8) being provided on the output side with a protective device (20).
PCT/DE1996/001412 1995-08-09 1996-07-30 Device for compensating harmonic oscillation currents in a transmission line consisting of several conductors WO1997006590A1 (en)

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DE1995129302 DE19529302A1 (en) 1995-08-09 1995-08-09 Device for compensating harmonic currents of a transmission path consisting of several conductors
DE19529302.9 1995-08-09

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Publication number Priority date Publication date Assignee Title
WO2002009748A1 (en) * 2000-07-31 2002-02-07 Yale University Innate immune system-directed vaccines

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