WO2003030397A1 - Method for reducing the radiation of signals inserted into energy supply lines - Google Patents

Method for reducing the radiation of signals inserted into energy supply lines Download PDF

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Publication number
WO2003030397A1
WO2003030397A1 PCT/DE2002/003583 DE0203583W WO03030397A1 WO 2003030397 A1 WO2003030397 A1 WO 2003030397A1 DE 0203583 W DE0203583 W DE 0203583W WO 03030397 A1 WO03030397 A1 WO 03030397A1
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WO
WIPO (PCT)
Prior art keywords
supply lines
energy supply
power supply
impedances
measured
Prior art date
Application number
PCT/DE2002/003583
Other languages
German (de)
French (fr)
Inventor
Kurt Aretz
Edgar Bolinth
Wolfgang Gröting
Ralf Kern
Heinz Schmidt
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2003030397A1 publication Critical patent/WO2003030397A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5425—Methods of transmitting or receiving signals via power distribution lines improving S/N by matching impedance, noise reduction, gain control

Abstract

According to the invention, the asymmetrical properties of the energy supply lines (N,L) of the energy supply network are measured, and the input and output impedances of the transmission units (UE) are adjusted according to the measured asymmetrical properties of the energy supply lines (L,N). By adapting the impedance on the emission side and on the reception side, the adaptation is carried out in relation to the asymmetrical properties of the energy supply lines (L,N) and the radiation of the signal (s) inserted into the energy supply lines is thus significantly reduced.

Description

Beschreibung description
Verfahren zum Vermindern der Abstrahlung von in Energieversorgungsleitungen eingekoppelten SignalenMethod for reducing the radiation of signals coupled into power supply lines
In Übertragungssystemen mit Energieversorgungsleitungen als Übertragungsmedium - in der Fachwelt auch als Powerline Com- munication Systems bekannt - werden die Übertragungseinrichtungen ähnlich wie bei einem Bussystem an die Energieversor- gungsleitungen angeschlossen. Bei diesem durch Energieversorgungsnetzleiterpaare gebildeten Energievorsorgungsnetz handelt es sich meist um ein sehr unsymmetrisches Netz, wobei die Unsymmetrie überwiegend durch unsymmetrische Netzabschlüsse und durch die einphasig spannungsgeführten Energie- Versorgungsleitungen verursacht werden. Trotz dieser zumindest teilweisen Unsymmetrie des Energieversorgungsnetzes werden die Übertragungseinrichtungen überwiegend symmetrisch an die Energieversorgungsleitungen angekoppelt, da bei einer symmetrischen Ankoppelung die Abstrahlung des eingekoppelten Signals - überwiegend im Frequenzbereich von 10 bis 30 MHz - für die Übertragung von Informationen am geringsten abgestrahlt wird. Bei stark unsymmetrischen Energieversorgungsnetzen führt eine symmetrische Einkoppelung nicht zu einer verminderten Abstrahlung des eingekoppelten Signals der Über- tragungseinrichtungen. • In transmission systems with energy supply lines as the transmission medium - also known in the technical field as Powerline Communication Systems - the transmission devices are connected to the energy supply lines in a manner similar to a bus system. This energy supply network, which is formed by pairs of energy supply network conductors, is usually a very asymmetrical network, the asymmetry being predominantly caused by asymmetrical network terminations and by the single-phase voltage-guided energy supply lines. Despite this at least partial asymmetry of the energy supply network, the transmission devices are predominantly coupled symmetrically to the energy supply lines, since in the case of a symmetrical coupling the radiation of the coupled signal - predominantly in the frequency range from 10 to 30 MHz - is emitted the least for the transmission of information. In the case of strongly asymmetrical energy supply networks, a symmetrical coupling does not lead to a reduced radiation of the coupled signal from the transmission devices. •
Die der Erfindung zugrundeliegende Aufgabe besteht darin, die • Abstrahlung eines durch die Übertragungseinrichtungen in die ■ Energieversorgungsleitungen eingekoppelten Signals zu vermin- dern. Die Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.The underlying the invention task is the countries • emission of a coupled by transmission facilities in the ■ power lines signal to vermin-. The object is solved by the features of claim 1.
Der wesentliche Aspekt des erfindungsgemäßen Verfahrens ist darin zu sehen, dass die Unsymmetrieeigenschaften der Ener- gieversorgungsleitungen des Energieversorgungsnetzes gemessen werden und die Eingangs- und Ausgangsimpedanzen der Übertragungseinrichtungen in Abhängigkeit von den gemessenen Unsym- metrieeigenschaften der Energieversorgungsleitungen eingestellt werden. Durch die sendeseitige und empfangsseitige Anpassung kann die Abstrahlung des in die Energieversorgungsleitungen eingekoppelten Signals erheblich reduziert werden.The essential aspect of the method according to the invention can be seen in the fact that the asymmetry properties of the energy supply lines of the energy supply network are measured and the input and output impedances of the transmission devices as a function of the measured asymmetry. measurement properties of the power supply lines can be set. The emission of the signal coupled into the power supply lines can be considerably reduced by the transmission-side and reception-side adaptation.
Das erfindungsgemäße Verfahren sowie weitere vorteilhafte Ausgestaltungen werden anhand einer zeichnerischen Darstellung näher erläutert .The method according to the invention and further advantageous embodiments are explained in more detail with the aid of a drawing.
Die Zeichnung zeigt den dem für die Erläuterung der Erfindung erforderlichen Teil des Sender S und des Empfängers E von Ü- bertragungseinrichtungen UE, die an Energieversorgungsleitungen L,N angeschlossen sind. Bei den beiden Energieversorgungsleitungen L,N sind durch einen Phasenleiter 1 und einen Nulleiter N gebildet. Die in den beide Energieversorgungsleitungen L,N eingefügten Impedanzen ZA,ZB stellen die Ersatzimpedanzen der Energieversorgungsleitungen L,N dar. In der Ü- bertragungseinrichtung UE mit dem dargestellten Sender S ist an jede der Energieversorgungsleitungen L,N eine steuerbare Impedanz Z1,Z2 angeschlossen, deren anderer Anschluss mit einem ein Signal für die Übertragung von Informationen im Frequenzbereich zwischen 10 und 30 MHz bildenden Signalgenerator G verbunden ist. Zur Steuerung des Messvorgangs und der steuerbaren bzw. regelbaren Impedanzen Z1..Z4 ist im Sender S und Empfänger E jeweils eine Steuerungseinrichtung ST angeordnet, die durch einen Mikroprozessor realisiert ist. Mit Hilfe der Steuereinrichtungen werden sowohl die Impedanzmessungen in der Reihenfolge gesteuert und dabei die Messwerte ermittelt als auch die steuerbaren Impedanzen eingestellt.The drawing shows that part of the transmitter S and the receiver E of transmission devices UE which are necessary for the explanation of the invention and which are connected to power supply lines L, N. In the two power supply lines L, N are formed by a phase conductor 1 and a neutral conductor N. The impedances ZA, ZB inserted in the two power supply lines L, N represent the equivalent impedances of the power supply lines L, N. In the transmission device UE with the illustrated transmitter S, a controllable impedance Z1, Z2 is connected to each of the power supply lines L, N, the other connection of which is connected to a signal generator G forming a signal for the transmission of information in the frequency range between 10 and 30 MHz. To control the measurement process and the controllable or regulable impedances Z1..Z4, a control device ST is arranged in the transmitter S and receiver E, which is implemented by a microprocessor. With the help of the control devices, both the impedance measurements are controlled in the order and the measured values are determined and the controllable impedances are set.
Erfindungsgemäß wird, da die Unsymmetrie der Energieversorgungsleitungen L,N nicht bekannt ist und zudem orts- und zeitabhängig ist, eine Unsymmetriemessung beispielsweise vor einer Informationsübertragung oder auch bei längerer Informa- tionsübertragung während der Übertragung durchgeführt. Eine vorteilhafte Messung der Unsymmetrie ist eine Impedanz- messung der beiden Energieversorgungsleitungen L,N gegen das Massepotential M. Die Differenz der gemessenen Impedanzen Z5,Z6 wird nun als Komplementärimpedanz durch entsprechende Einstellung einer oder beider steuerbarer Impedanzen Z1,Z2 in die Energieversorgungsleitungen L,N eingefügt. Diese Messung wird mit Hilfe der Steuerungen ST durchgeführt, wobei diese die beiden steuerbaren Impedanzen Z1,Z2 derart einstellen, dass eine Symmetrie erreicht wird. Hierdurch wird die Aus- gangsstufe des Senders S symmetrisch zum Massepotential M abgeschlossen. Die gleiche Messprozedur wird nun beim Empfänger E der anderen an die Energieversorgungsleitungen L,N angeschlossenen Übertragungseinrichtungen UE durchgeführt. Hierbei wird wiederum die Unsymmetrie der beiden Energieversor- gungsleitungen L,N gemessen und die Differenz der beiden gemessenen Impedanzen Z5,Z6 als Komplementärimpedanz mit Hilfe einer oder beider steuerbaren Impedanzen Z3,Z4 in die Energieversorgungsleitungen L,N derart eingefügt, dass der Eingangsteil des Senders symmetrisch gegen Massepotential abge- schlössen ist.According to the invention, since the asymmetry of the energy supply lines L, N is not known and is also dependent on location and time, an asymmetry measurement is carried out, for example, before an information transmission or even during a longer information transmission during the transmission. An advantageous measurement of the asymmetry is an impedance measurement of the two energy supply lines L, N against the ground potential M. The difference between the measured impedances Z5, Z6 is now calculated as a complementary impedance by appropriate setting of one or both controllable impedances Z1, Z2 in the energy supply lines L, N inserted. This measurement is carried out with the aid of the controls ST, which set the two controllable impedances Z1, Z2 in such a way that symmetry is achieved. As a result, the output stage of the transmitter S is terminated symmetrically to the ground potential M. The same measurement procedure is now carried out at the receiver E of the other transmission devices UE connected to the energy supply lines L, N. In this case, the asymmetry of the two energy supply lines L, N is again measured and the difference between the two measured impedances Z5, Z6 is inserted as a complementary impedance with the help of one or both controllable impedances Z3, Z4 in the energy supply lines L, N in such a way that the input part of the transmitter is closed symmetrically against ground potential.
Nach diesen Messungen und Einstellungen sind der Sender S und Empfänger E der beiden Übertragungseinrichtungen UE optimal an die Impedanzen bzw. an die Unsymmetrie der Energieversor- gungsleitungen L,N angepasst, d.h. die Eingangs- und Ausgangsimpedanzen der Übertragungseinrichtungen UE sind optimal an die Unsymmetrieeigenschaften des Energieversorgungsnetzes angepasst. Dadurch wird die Abstrahlung der über das Energieversorgungsnetz geführten Signal erheblich verringert. After these measurements and settings, the transmitter S and receiver E of the two transmission devices UE are optimally adapted to the impedances or to the asymmetry of the energy supply lines L, N, i.e. the input and output impedances of the transmission devices UE are optimally adapted to the asymmetry properties of the energy supply network. As a result, the radiation of the signal carried over the power supply network is considerably reduced.

Claims

Patentansprüche claims
1. Verfahren zum Vermindern der Abstrahlung von Signalen (s) , die von Übertragungseinrichtungen (UE) in Energieversorgungs- leitungen (L,N) eingekoppelt werden, dadurch gekennzeichnet, dass die Unsymmetrieeigenschaften der Energieversorgungsleitungen (N,L) des Energieversorgungsnetzes gemessen werden und dass die Eingangs- und Ausgangsimpedanzen der Übertragungs- einrichtungen (UE) in Abhängigkeit von den gemessenen Unsymmetrieeigenschaften der Energieversorgungsleitungen (L,N) eingestellt werden.1. A method for reducing the radiation of signals (s), which are coupled from transmission devices (UE) in power supply lines (L, N), characterized in that the asymmetry properties of the power supply lines (N, L) of the power supply network are measured and that the input and output impedances of the transmission devices (UE) are set as a function of the measured asymmetry properties of the power supply lines (L, N).
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Unsymmetriemessung durch eine Impedanzmessung beider Adern der Energieversorgungsleitungen (L,N) gegen Massepotential (M) erfolgt, dass die gemessenen Impedanzen (Z5,Z6) als Komplementärimpedanzen in die Energieversorgungsleitungen (L,N) bei der Sendeseite der Übertragungseinrichtungen (UE) eingefügt wird, und dass die Unsymmetriemessung erneut durchgeführt wird und eine zu den gemessenen Impedanzen (Z5,Z6) ausgebildete Komplementärimpedanz bei der Empfangseite der Übertragungseinrichtung (UE) eingefügt wird.2. The method according to claim 1, characterized in that the asymmetry measurement is carried out by an impedance measurement of both wires of the power supply lines (L, N) against ground potential (M), that the measured impedances (Z5, Z6) as complementary impedances in the power supply lines (L, N ) is inserted at the transmission side of the transmission device (UE), and that the asymmetry measurement is carried out again and a complementary impedance formed to the measured impedances (Z5, Z6) is inserted at the reception side of the transmission device (UE).
3. Verfahren nach Anspruch 2 , dadurch ge en zeichnet, dass die Komplementärimpedanzen als steuerbare Impedanzen (Z1..Z4) im Sender (S) und Empfänger (E) der Übertragungseinrichtungen (UE) ausgebildet sind.3. The method according to claim 2, characterized in that the complementary impedances are designed as controllable impedances (Z1..Z4) in the transmitter (S) and receiver (E) of the transmission devices (UE).
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass ein über die Energieversorgungsleitungen (L,N) zu übertragende Signal (s) einen Frequenzbereich von 1 bis 30 MHz aufweist . 4. The method according to any one of claims 1 to 3, characterized in that a signal (s) to be transmitted via the power supply lines (L, N) has a frequency range from 1 to 30 MHz.
PCT/DE2002/003583 2001-09-28 2002-09-20 Method for reducing the radiation of signals inserted into energy supply lines WO2003030397A1 (en)

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DE2001147918 DE10147918A1 (en) 2001-09-28 2001-09-28 Method for reducing the radiation of signals coupled into power supply lines
DE10147918.2 2001-09-28

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2947784A1 (en) 2014-05-23 2015-11-25 Witikee SRL Method and apparatus for transmitting data signals
CN109495136A (en) * 2018-12-29 2019-03-19 重庆邮电大学 A kind of vehicle mounted electric line of force communication Adaptive impedance matching method
DE102013214825B4 (en) 2013-07-30 2023-11-23 Bayerische Motoren Werke Aktiengesellschaft Method for adjusting the transmission properties of a signal

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US6998962B2 (en) 2000-04-14 2006-02-14 Current Technologies, Llc Power line communication apparatus and method of using the same
US7098773B2 (en) 2003-07-03 2006-08-29 Current Technologies, Llc Power line communication system and method of operating the same
US7280033B2 (en) 2003-10-15 2007-10-09 Current Technologies, Llc Surface wave power line communications system and method
US7307510B2 (en) 2005-09-02 2007-12-11 Current Technologies, Llc Power meter bypass device and method for a power line communications system

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DE630211C (en) * 1930-07-01 1936-05-23 Siemens & Halske Akt Ges Method for reducing the interference in submarine telecommunications cables caused by earth imbalances
DE3318508A1 (en) * 1983-05-20 1984-11-22 Siemens AG, 1000 Berlin und 8000 München Method for measuring imbalance
DE19844394A1 (en) * 1998-09-28 2000-03-30 Stiebel Eltron Gmbh & Co Kg Two-conductor bus system for data transmission between two stations with transmission and reception circuits

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WO2001069812A1 (en) * 2000-03-15 2001-09-20 Siemens Aktiengesellschaft Powerline communication system, powerline communication transmission network and powerline communication device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE630211C (en) * 1930-07-01 1936-05-23 Siemens & Halske Akt Ges Method for reducing the interference in submarine telecommunications cables caused by earth imbalances
DE3318508A1 (en) * 1983-05-20 1984-11-22 Siemens AG, 1000 Berlin und 8000 München Method for measuring imbalance
DE19844394A1 (en) * 1998-09-28 2000-03-30 Stiebel Eltron Gmbh & Co Kg Two-conductor bus system for data transmission between two stations with transmission and reception circuits

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013214825B4 (en) 2013-07-30 2023-11-23 Bayerische Motoren Werke Aktiengesellschaft Method for adjusting the transmission properties of a signal
EP2947784A1 (en) 2014-05-23 2015-11-25 Witikee SRL Method and apparatus for transmitting data signals
CN109495136A (en) * 2018-12-29 2019-03-19 重庆邮电大学 A kind of vehicle mounted electric line of force communication Adaptive impedance matching method

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