EP1344366A2 - Procede et dispositif pour transmettre des donnees sur au moins une ligne d'alimentation en energie electrique - Google Patents

Procede et dispositif pour transmettre des donnees sur au moins une ligne d'alimentation en energie electrique

Info

Publication number
EP1344366A2
EP1344366A2 EP01995578A EP01995578A EP1344366A2 EP 1344366 A2 EP1344366 A2 EP 1344366A2 EP 01995578 A EP01995578 A EP 01995578A EP 01995578 A EP01995578 A EP 01995578A EP 1344366 A2 EP1344366 A2 EP 1344366A2
Authority
EP
European Patent Office
Prior art keywords
ofdm
pulse
interference
receiver
transmitted
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Withdrawn
Application number
EP01995578A
Other languages
German (de)
English (en)
Inventor
Norbert Elsner
Gerd Griepentrog
Reinhard Maier
Klaus Dostert
Wilfried Matthee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 AG, Siemens Corp filed Critical Siemens AG
Publication of EP1344366A2 publication Critical patent/EP1344366A2/fr
Withdrawn legal-status Critical Current

Links

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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH
    • 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
    • H04B2203/5416—Methods of transmitting or receiving signals via power distribution lines by adding signals to the wave form of the power source
    • 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
    • H04B2203/5462—Systems for power line communications
    • H04B2203/547—Systems for power line communications via DC power distribution
    • 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
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5483—Systems for power line communications using coupling circuits
    • 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
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5491—Systems for power line communications using filtering and bypassing

Definitions

  • the periodic interference pulses are caused by the commutation of the current in the rectifier.
  • the converter components or valves usually diodes or thyristors, in a rectifier carry the direct current alternately.
  • inductances between the valves create a voltage peak, which is associated with voltage increases of the order of magnitude of approximately 400 kV / s. Since the commutation times are determined by the frequency of the AC network, the interference pulses occur in a certain time grid, that is to say periodically.
  • the object of the invention is therefore to specify a suitable data transmission method, which can be used in particular in DC voltage power supplies, and to provide an associated device.
  • the problem mentioned at the outset is solved in a simple manner by designing the OFDM method in such a way that the OFDM blocks to be transmitted have a length of approximately 85% of the distance between two periodic interference pulses.
  • the frequency difference of two carriers must be in an integer ratio to the reciprocal length of the OFDM block.
  • ⁇ CU P- d ⁇ P- 1 P- 1 ö P vq N d vQ ⁇ cn ⁇ rt to tr F- ⁇ - 1 ⁇ P. F- P. tr ö H- ⁇ tr P vq H- ⁇ dd cn PJ • ⁇ ti ⁇ rt H ⁇ cn cn ⁇ H- d O ⁇ ⁇ S ⁇ Hl Hi vQ ⁇ rt P- ⁇ P "Hl tr cu tn cd tn vQ ⁇
  • Figure 1 is a graphical representation of the time course of a DC voltage for a subway system, Figure 2 and the transmitter part
  • FIG. 3 shows the receiver part of a suitable device for data transmission in the case of DC voltage curves according to FIG. 1.
  • PLC Powerline Communication
  • subways are operated with a nominal DC voltage of 750 V. It is common practice to provide the DC voltage using 12-pulse rectifiers, which in turn are fed by a converter transformer.
  • the 12-pulse rectifiers consist of two 6-pulse rectifiers, which in turn are fed by two windings of the converter transformer that are electrically offset by 30 ° from each other.
  • the converter transformer is primarily connected to the general energy supply with a mains frequency of 50 Hz.
  • the described method can also be used at other frequencies such as Can be used at 60 Hz.
  • FIG. 1 shows, by way of example, a measured time profile of the DC train voltage over a period of 20 ms.
  • the voltage signal is denoted by 1. It can be seen that the DC voltage is not constant, but rather is subject to fluctuations of up to approximately 80 V.
  • the useful signal of a PLC system arriving at the receiver depends on the transmission properties of the route and the distance of the transmitter and is only a few 10 mV to a maximum of about 1 V due to the limited permissible transmission power.
  • the data signal is partitioned in such a way that a single data block with a certain safety distance fits between two interference pulses.
  • the data signal is thus always transmitted in a fault-free time period, the precise temporal correlation with the interference pulse pattern being established with the combination of threshold switch 33a and subsequent phase-locked loop 33b described above.
  • a receiver 30 is formed from a coupling unit 31 for the rail system from FIG. 2, which is followed by a filter 32, an impedance 34 and a short-circuiter 35.
  • AGC Automatic Gain Control
  • the data are sent to a processing unit 38 for OFDM signals via an A / D converter 37.
  • the interference pulses are recorded with the aid of a threshold switch on the network side and fed to a phase locked loop (PLL) for the purpose of jitter suppression as a rectangular guide signal.
  • PLL phase locked loop
  • the stable synchronizing signal from the phase locked loop in the time grid of the interference pulses is then fed to a the 'short closers 35 and the other processing unit 38 for OFDM signals.
  • the short-circuiter thus suppresses the received signal for as long as an interference pulse lasts and releases the receiver input as soon as the interference-free period between the interference pulses begins. Due to the stable synchronization signal, the processing unit 38 for OFDM signals the exact 'temporal position of the known data packets to be processed, can be carried out so that a proper data recovery.
  • a switch in the parallel branch can also be used.
  • the impedance 34 is not required in this case.
  • the interference pulse is e.g. kept away from the OFDM processing unit in that the signal line via an analog switch, e.g. in
  • the signal is fed to the amplifier 36 with automatic gain control (AGC), which amplifies it to a level optimally set for the A / D conversion.
  • AGC automatic gain control
  • the partitioned signals are then combined in the subsequent processing units and decoded in accordance with the prior art.
  • the OFDM method known per se is modified by a division, ie a so-called partitioning of the data, in such a way that a transmission takes place only in virtually trouble-free time segments .
  • the transmission process is synchronized with the periodic pulse interferer and it is sent exactly between the interference pulses. Accordingly, the detection and masking of the interference pulses takes place in the receiver.
  • the partitioned data can be combined.
  • the invention has been described above ' specifically for data transmission in a DC voltage supply for subways.
  • the invention can also be used in other networks operated with DC voltage, for example in DC voltage networks for the self-supply of switchgear.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Noise Elimination (AREA)

Abstract

Dans la transmission de données sur des lignes de transport d'énergie électriques, on connaît le procédé de multiplexage fréquentiel optique, selon lequel l'information à transmettre est répartie sur de multiples porteuses et le signal de sommation des signaux porteurs modulés est transmis sous forme de bloc de multiplexage fréquentiel optique. Les procédés de multiplexage fréquentiel optique sont toutefois extrêmement sensibles aux forts brouilleurs par impulsions périodiques. Selon l'invention, le procédé est de ce fait conçu de manière que les blocs de multiplexage fréquentiel optique à transmettre présentent une longueur d'approximativement 85 % de la distance entre deux impulsions perturbatrices périodiques. L'écart entre porteuses résulte en conséquence de la durée réciproque des blocs de multiplexage fréquentiel optique. Les blocs de multiplexage fréquentiel optique émis sont ensuite synchronisés avec des brouilleurs périodiques impulsions, de sorte qu'un bloc se trouve dans chaque cas entre deux impulsions perturbatrices. Les brouilleurs impulsionnels peuvent être supprimés au niveau du récepteur. A cet effet, le dispositif présente un émetteur (20) conçu en conséquence, ainsi qu'un récepteur (30) correspondant.
EP01995578A 2000-12-20 2001-12-06 Procede et dispositif pour transmettre des donnees sur au moins une ligne d'alimentation en energie electrique Withdrawn EP1344366A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10063675 2000-12-20
DE10063675A DE10063675C1 (de) 2000-12-20 2000-12-20 Verfahren und Vorrichtung zur Übertragung von Daten auf wenigstens einer elektrischen Energieversorgungsleitung
PCT/DE2001/004583 WO2002051089A2 (fr) 2000-12-20 2001-12-06 Procede et dispositif pour transmettre des donnees sur au moins une ligne d'alimentation en energie electrique

Publications (1)

Publication Number Publication Date
EP1344366A2 true EP1344366A2 (fr) 2003-09-17

Family

ID=7668046

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01995578A Withdrawn EP1344366A2 (fr) 2000-12-20 2001-12-06 Procede et dispositif pour transmettre des donnees sur au moins une ligne d'alimentation en energie electrique

Country Status (7)

Country Link
US (1) US7161985B2 (fr)
EP (1) EP1344366A2 (fr)
JP (1) JP4125956B2 (fr)
CN (1) CN1526223A (fr)
DE (1) DE10063675C1 (fr)
NO (1) NO20032823L (fr)
WO (1) WO2002051089A2 (fr)

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Also Published As

Publication number Publication date
NO20032823L (no) 2003-08-19
US20040047427A1 (en) 2004-03-11
US7161985B2 (en) 2007-01-09
DE10063675C1 (de) 2002-06-20
NO20032823D0 (no) 2003-06-19
JP2004531106A (ja) 2004-10-07
CN1526223A (zh) 2004-09-01
WO2002051089A3 (fr) 2003-01-30
WO2002051089A2 (fr) 2002-06-27
JP4125956B2 (ja) 2008-07-30

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