WO2001067630A1 - Couplage d'une tete de ligne a un reseau de distribution basse tension - Google Patents

Couplage d'une tete de ligne a un reseau de distribution basse tension Download PDF

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Publication number
WO2001067630A1
WO2001067630A1 PCT/CH2000/000130 CH0000130W WO0167630A1 WO 2001067630 A1 WO2001067630 A1 WO 2001067630A1 CH 0000130 W CH0000130 W CH 0000130W WO 0167630 A1 WO0167630 A1 WO 0167630A1
Authority
WO
WIPO (PCT)
Prior art keywords
head
station
distributor
current
low
Prior art date
Application number
PCT/CH2000/000130
Other languages
German (de)
English (en)
Inventor
Hanspeter Widmer
Original Assignee
Ascom Powerline Communications Ag
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 Ascom Powerline Communications Ag filed Critical Ascom Powerline Communications Ag
Priority to IL15150600A priority Critical patent/IL151506A0/xx
Priority to AU2000227915A priority patent/AU2000227915A1/en
Priority to BR0017145-0A priority patent/BR0017145A/pt
Priority to PCT/CH2000/000130 priority patent/WO2001067630A1/fr
Priority to EP00906130A priority patent/EP1264419A1/fr
Priority to CN00819301.0A priority patent/CN1451207A/zh
Publication of WO2001067630A1 publication Critical patent/WO2001067630A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/56—Circuits for coupling, blocking, or by-passing of signals
    • 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
    • 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
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/5437—Wired telephone
    • 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
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/5445—Local network
    • 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
    • H04B2203/5466—Systems for power line communications using three phases conductors
    • 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 invention relates to a circuit arrangement for coupling in and out a high-frequency message signal from at least one head-end station into and out of a low-voltage power supply network, and a corresponding method.
  • the supply signal is from the root, i.e. a central point, e.g. B. a transformer station in a residential area, distributed over a plurality of branches to the individual blocks of flats. Within one apartment block there is a further branching to the individual apartments and within one apartment to the various sockets and other network access.
  • the transmitters and receivers are connected as close as possible to one another on the power grid.
  • this makes communication with stations that are connected to another branch of the network more difficult.
  • this requires a plurality of decentralized network transitions for data transmission from or to other communication networks.
  • the object of the invention is to provide a circuit arrangement of the type mentioned at the outset which avoids the problems existing in the prior art and in particular permits energy and effort-efficient message transmission within a power supply network and also from or to other communication networks.
  • the low-voltage power supply network comprises a network node for coupling a high-frequency message signal from at least one head station into and out of the low-voltage power supply network.
  • the network node for example a transformer or a distribution station, has a distribution device for distributing the network current to a plurality of supply lines.
  • the head station via which the message signal is coupled into or out of the low-voltage power supply network, is connected to the distributor device.
  • the transmission of the message signal takes place between the head-end station and a plurality of subscriber stations, which are typically located in the area of the branches of the low-voltage power supply network, e.g. B. are connected to an electrical outlet in an apartment or at a distribution box in a house to the low-voltage power supply network.
  • the head-end station communicates with the subscriber stations and, on the other hand, controls and controls the communication between the subscriber stations.
  • data is transferred from or to other communication networks such as the telephone network or the Internet via the head-end station.
  • all subscriber stations which are either connected to the same branch or even to different branches of the low-voltage power supply network can be reached via a head station. Due to the central location, the head-end station can also be reached in the opposite direction from all subscriber stations. All participants also receive messages from or be able to transmit to other communication networks, a single network transition implemented at the head-end station is therefore sufficient.
  • the head-end station By connecting the head-end station to the low-voltage power supply network, not only is the message signal transmitted, but at the same time the head-end station is also supplied with electrical energy from the low-voltage power supply network.
  • the head station is preferably capacitively coupled to the distribution device.
  • the high-frequency message signal is switched into or out of the distribution device, for example via a high-pass filter. decoupled from it.
  • the high-pass filter also prevents the low-frequency but high-energy mains current from entering the data path of the head-end station.
  • the distributor device To distribute the mains current, the distributor device has a current input, a distributor and at least one current output.
  • the mains current to be distributed is fed to the distributor via the current input.
  • the mains current is then distributed to the individual supply lines via the current outputs branching off from the distributor, which are each connected to a current output for this purpose.
  • the distributor for example a busbar
  • He has z. B. each have its own busbar for the three phases and the neutral conductor of a three-phase mains current.
  • each current output of the distributor device must also have at least two current conductors, each of which is connected to a corresponding pole of the distributor.
  • the head-end station can be connected to the low-voltage power supply network.
  • the head-end station is connected to the distributor.
  • this has at least two poles, one for the neutral conductor and at least one for a phase conductor, and the head station has at least two connection contacts.
  • the head-end station is accordingly connected to one pole of the distribution device with one connection contact each.
  • the head-end station is connected to at least one current output of the distributor device, that is to say in the direction of subscriber stations virtually behind the distributor.
  • a plurality of head stations are connected to exactly one supply line each. This means that a different message signal can be sent on different branches.
  • the head station in turn has at least two connection contacts and a current output comprises at least two current conductors, ie a neutral conductor and at least one phase conductor.
  • the head-end station is connected to a power conductor of a supply line with one connection contact each.
  • the head station is preferably connected to at least two current outputs, a switch arrangement being connected between the head station and the current outputs.
  • the switch arrangement is designed in such a way that the head-end station can optionally be coupled to one or to several current outputs at the same time.
  • the head-end station can thus optionally couple a message signal onto one or more supply lines at the same time.
  • each current output comprises at least two current conductors.
  • individual or all current conductors of a supply line are advantageously protected against overcurrents with an overcurrent breaker.
  • the overcurrent breaker, i. H. the fuse is located, for example, directly when a current output is connected to the distributor.
  • one or more current conductors of a current output are preferably connected to the distributor via a low-pass filter.
  • this low-pass filter not only suppresses interference from outside, but at the same time prevents the propagation of the message signals coupled into the power supply network in undesired directions.
  • the low-pass filter is preferably integrated in the overcurrent breaker.
  • the low-pass filter for example a choke coil with suitable inductance, is integrated in the housing of the fuse or, more generally, that the low-pass filter and the overcurrent breaker are housed in the same housing. This ensures that there is no additional effort when installing a low-pass filter in existing systems, only the old fuse has to be replaced by a new fuse with an integrated filter.
  • the inductance of the choke is chosen so that its impedance low-frequency signals like hardly affects the mains current, but is very large for high-frequency signals such as the message signal or corresponding interference signals.
  • the message signal For data transmission via a low-voltage power supply network, e.g., a 230V / 400V power supply network with a network frequency below 1 kHz, the message signal preferably has a frequency between 1 MHz and 60 MHz. That is, the messages are modulated onto a carrier with a carrier frequency between 1 MHz and MHzO MHz.
  • a plurality of subscriber stations are connected to the low-voltage power supply network.
  • the head station is advantageously designed such that the subscriber stations can exchange message signals on the one hand with the at least one head station and on the other hand with one another via the at least one head station.
  • the head station For the transmission of messages from or to a head or a subscriber station to or from external (in relation to the low-voltage power supply network) subscribers, the head station is preferably connected to a further communication network in addition to the low-voltage power supply network.
  • a method having the features of claim 15 is preferred for sending or receiving a message from a head station via a low-voltage power supply network which has a network node with a distribution device and in which the head station in the network node is connected to the distribution device used.
  • the distribution device in the network node serves to distribute network current over a plurality of supply lines.
  • the network node is, for example, a transformer station for the energy supply of a residential area or a distribution station for the energy supply of the individual houses on a street.
  • a high-frequency message signal is generated in the head-end station by modulating a high-frequency carrier signal with the message and is capacitively coupled into the distribution device.
  • the head-end station capacitively couples it out and the message is recovered by means of demodulation of the message signal.
  • the messages to be sent are typically generated by a data terminal, for example a computer connected to the head-end station or to a subscriber station, and are generally coded or decoded before the modulation or after the demodulation and finally processed further by the receiver as desired.
  • a data terminal for example a computer connected to the head-end station or to a subscriber station
  • the method can in particular be carried out with circuit arrangements of the type described above.
  • a message signal coupled into the low-voltage power supply network via two current conductors of a current output can propagate in the network in various ways: directly on the supply line which is connected to this current output Current output via the distributor to other current outputs or even via the distributor towards the current input.
  • the signal path from a current output back via the distributor to the other current outputs or even to the current input is generally undesirable. Therefore, low-pass filtering is preferably carried out in at least one of the at least two current conductors of the corresponding current output with a low-pass filter located between the distributor and the connection point of the head-end station, and the message signal is filtered out. At the same time, this low-pass filter can also suppress unwanted interference, on the one hand from the distributor and on the other hand from the current output.
  • the coupled-in message signal may only be transmitted via certain supply lines.
  • Low-pass filters placed in this way are also useful in this case. additionally In such a case, the current input of the distribution device could also be provided with a low-pass filter.
  • the current outputs or the individual current conductors of a current output are preferably protected against overcurrents between the distributor and the head-end station. That is, An overcurrent breaker is inserted in at least one current conductor between the distributor and a connection point of the head-end station.
  • a head-end station such as is used to couple a high-frequency message signal into or out of a low-voltage power supply network, corresponds to a transceiver with additional functions.
  • electrical signals are capacitively coupled into or out of a power supply network.
  • the additional functions include, for example, the coordination of the communication of other transmitting / receiving devices with one another.
  • Such a head-end station is preferably used to couple a high-frequency message signal into or out of a low-voltage power supply network by connecting the head-end station to a distribution device which is located in a network node of the low-voltage power supply network for distributing mains power to a plurality of supply lines serves.
  • FIG. 1 shows a schematic representation of a low-voltage power supply network with a network node and a plurality of supply lines
  • FIG. 2 shows a circuit arrangement according to the invention with a distributor device and a head station connected to the distributor
  • FIG. 3 shows a detailed section of the circuit arrangement from FIG. 2,
  • FIG. 4 shows a circuit arrangement according to the invention with a distributor device and a head station connected to a current output
  • FIG. 5 shows a detailed section of the circuit arrangement from FIG. 4,
  • FIG. 6 shows a circuit arrangement according to the invention with a distributor device and a head station connected to a plurality of current outputs
  • FIG. 7 shows a circuit arrangement according to the invention with a distributor device and a head station connected to a plurality of current outputs via a switching device
  • 8 shows a circuit arrangement according to the invention with a distributor device and a plurality of head stations each connected to a current output
  • FIG. 1 shows a schematic illustration of a low-voltage power supply network 3 with a local network transformer station 1 and a plurality of supply lines 2 1, 2 2, 2 3, 2 4 and 2 5.
  • the transformer station 1 is fed via a medium-voltage line 5, the medium voltage in the transformer station 1 being transformed down to low voltage with a transformer 6.
  • the low voltage is distributed to the individual supply lines 2 1 to 2 5 via a distributor device 7
  • a head station 8 is connected to the distribution device 7 and is connected to two further communication networks 10 and 11 via a router 9
  • the supply lines 2 1 to 2 5 lead to a plurality of electricity consumers.
  • Supply line 2 1 leads, for example, into a residential area with two houses 12 and 13, the rooms of which are supplied with electrical energy from the low-voltage power supply network 3 via corresponding power lines.
  • Supply line 2 2 leads into Industrial area, which is indicated by a factory 14, which is connected to the low-voltage power supply network 3
  • a subscriber 15 1 is shown in house 12, a subscriber 15 2 in house 13 and a subscriber 15 3 in factory 14, each of which is connected to the low-voltage power supply network 3 via a subscriber station 16 1, 16 2 or 16 3
  • Each participant 15.1 to 15.3 can exchange data with the other users via the head-end station 8.
  • the participants 15.1 and 15.2 can communicate via the supply line 2.1 either via the head station 8 or directly with one another and finally all participants 15.1 to 15.3 can transmit messages from participants to the other communication networks 10 and 11 via the head station 8 and the router 9 receive this.
  • the communication networks 10 or 11 are, for example, a telephone network or the Internet
  • the participants 15.1 to 15.3 can make a telephone call with another participant in the communication network 10 or they can use the various Internet services via the low-voltage power supply network 3.
  • FIG. 2 shows a circuit arrangement according to the invention as a section of the transformer station 1.
  • the distributor device 7 comprises a current input 17, a distributor 18 and a plurality of current outputs 19, 20, 21, 22 and 23.
  • the head station 8 is capacitively connected to the distributor 18.
  • the capacitive coupling is indicated by a capacitance 24 between the head-end station and the distributor.
  • the supply lines 2.1 to 2.5 are connected to the current outputs 19 to 23, which are each protected by overcurrent breakers 25.
  • FIG. 3 shows part of the circuit arrangement from FIG. 2 using the example of a single-phase power network.
  • the current input 17 of the distributor device 7 comprises a neutral conductor 26 and a phase conductor 27. Both are connected to a busbar 28.1 and 28.2, which together form the distributor 18.
  • a neutral conductor and a phase conductor together form a current output.
  • Neutral conductors 26.1 with phase conductors 27.1 form the current output 22
  • neutral conductors 26.2 with phase conductors 27.2 form the current output 23.
  • Corresponding supply lines 2.1 and 2.2 are connected to each current output 22 or 23.
  • the head station 8 has two connection contacts 29.1, 29.2, which are each capacitively coupled to a busbar 28.1, 28.2. In this figure, too, the capacitive coupling is represented by a respective capacitance 24.
  • FIG. 4 shows another type of coupling for connecting the head station 8 to the distributor device 7.
  • the head station 8 is not connected to the distributor 18 but to a current output 23.
  • connection contacts 29.1 and 29.2 of the head station 8 are accordingly connected to the neutral conductor 26.2 and the phase conductor 27.2 of the current output 23, respectively.
  • a filter 30 is shown in each conductor. This prevents message signals from or to the head station 8 from going in the wrong direction, namely in the direction of the distributor 18.
  • FIG. 5 A further type of coupling for the head station 8 is shown in FIG.
  • the head-end station 8 is connected to several current outputs 19 to 23 of the distribution device 7 at the same time.
  • the connection of the connection contacts 29.1, 29.2 of the head station 8 to the individual current conductors of each current output 19 to 23 is realized according to FIG. 5.
  • a filtering of the message signals with filters 30 as in FIG. 5 is not shown in FIG. 6, but would be easily implemented by interposing corresponding filters in individual or all current outputs 19 to 23.
  • the head station 8 is also connected to a plurality of current outputs 19 to 23.
  • the coupling does not take place directly, but via a switching device 31.
  • the head station 8 is connected on one side of the switching device 31 and the current outputs 19 to 23 are connected on the other side.
  • the switching device 31 can be used, for example, to control which of the current outputs 19 to 23 connected to the switching device 31 is to be coupled into a message signal emitted by the head station 8 or to which current output 19 to 23 the head station 8 is to be connected for the purpose of receiving a message signal ,
  • the switching device 31 can also be controlled from the outside, ie by the head station 8 itself or by other devices or persons. In the connections between the current outputs 19 to 23 and the switching device
  • both an overcurrent breaker 25 and a filter 30 are present in each current output 19 to 23.
  • the special feature of the illustrated embodiment is that the filter 30 is integrated in the corresponding overcurrent breaker 25.
  • FIG. 8 shows how a plurality of head stations 8.1, 8.2, 8.3, 8.4, 8.5 are connected to exactly one current output 1 to 23. This enables the sending or receiving of different message signals by a head-end station 8.1 to 8.5 on resp. from the various current outputs 19 to 23 or supply lines 2.1 to 2.5.
  • the filters 30 integrated in the overcurrent breakers 25 prevent the message signals which are coupled in on a specific current output from spreading unintentionally via the distributor 18 and disrupting the message transmission on the other current outputs.
  • the coupling of the individual head stations 8.1 to 8.5 to the respective current output 19 to 23 takes place analogously to the coupling of the head station 8 to the current output 23 in FIG. 4 or FIG. 5.
  • a protective conductor can of course also be provided to protect the circuits.
  • the procedure for securing, for example with protective earth, is known to the person skilled in the art.
  • the ground conductors and the groundings of the individual circuit arrangements have been omitted in the figures.

Landscapes

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

Abstract

Selon l'invention, au moins une tête de ligne (8) et une pluralité de stations d'abonnés (16.1, 16.2, 16.3) sont raccordées à un réseau de distribution basse tension (3) servant à distribuer du courant entre une station de transformateur (1) et une pluralité d'abonnés dans des habitations (12, 13) ou des usines (14). La tête de ligne (8) est couplée de manière capacitive au dispositif de distribution (7) dans la station de transformateur (1) et commande ou régule la circulation des données entre les stations d'abonnés (16.1, 16.2, 16.3). En outre, la tête de ligne (8) est raccordée à d'autres réseaux de communication (10, 11) pour transmettre des informations par l'intermédiaire d'un routeur (9). Par l'intermédiaire du réseau de distribution basse tension (3), les stations d'abonnés (16.1, 16.2, 16.3) peuvent communiquer premièrement avec la tête de ligne (8), deuxièmement entre elles, directement ou indirectement par l'intermédiaire de la tête de ligne (8), et troisièmement avec des abonnés dans les autres réseaux de communication (10, 11) par l'intermédiaire de la tête de ligne.
PCT/CH2000/000130 2000-03-08 2000-03-08 Couplage d'une tete de ligne a un reseau de distribution basse tension WO2001067630A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
IL15150600A IL151506A0 (en) 2000-03-08 2000-03-08 Coupling of headstation to a low-voltage power supply network
AU2000227915A AU2000227915A1 (en) 2000-03-08 2000-03-08 Coupling of a head station to a low-voltage power supply network
BR0017145-0A BR0017145A (pt) 2000-03-08 2000-03-08 Acoplamento de uma cabeça de rede a uma rede de alimentação de baixa tensão
PCT/CH2000/000130 WO2001067630A1 (fr) 2000-03-08 2000-03-08 Couplage d'une tete de ligne a un reseau de distribution basse tension
EP00906130A EP1264419A1 (fr) 2000-03-08 2000-03-08 Couplage d'une tete de ligne a un reseau de distribution basse tension
CN00819301.0A CN1451207A (zh) 2000-03-08 2000-03-08 主电台至低电压电力供应网络的耦接

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2000/000130 WO2001067630A1 (fr) 2000-03-08 2000-03-08 Couplage d'une tete de ligne a un reseau de distribution basse tension

Publications (1)

Publication Number Publication Date
WO2001067630A1 true WO2001067630A1 (fr) 2001-09-13

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ID=4358053

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2000/000130 WO2001067630A1 (fr) 2000-03-08 2000-03-08 Couplage d'une tete de ligne a un reseau de distribution basse tension

Country Status (6)

Country Link
EP (1) EP1264419A1 (fr)
CN (1) CN1451207A (fr)
AU (1) AU2000227915A1 (fr)
BR (1) BR0017145A (fr)
IL (1) IL151506A0 (fr)
WO (1) WO2001067630A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005109669A1 (fr) * 2004-04-14 2005-11-17 Telkonet, Inc. Procede et appareil d'installation d'un reseau de communication par cables electriques
US6975212B2 (en) 2001-10-02 2005-12-13 Telkonet Communications, Inc. Method and apparatus for attaching power line communications to customer premises
USRE40492E1 (en) 2000-02-10 2008-09-09 Telkonet Communications, Inc. Power line telephony exchange
CN101765268A (zh) * 2009-11-20 2010-06-30 深圳华智测控技术有限公司 基于自动路由技术的电力载波照明控制系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5895363B2 (ja) * 2011-05-13 2016-03-30 ソニー株式会社 電力供給制御装置及びその制御方法、並びに電力供給制御システム

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5684450A (en) * 1992-10-22 1997-11-04 Norweb Plc Electricity distribution and/or power transmission network and filter for telecommunication over power lines
WO2000007304A2 (fr) * 1998-07-27 2000-02-10 Siemens Aktiengesellschaft Dispositif servant a transformer un premier signal electrique en un deuxieme signal electrique et dispositif servant a transformer un signal electrique a moduler en un premier signal electrique

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5684450A (en) * 1992-10-22 1997-11-04 Norweb Plc Electricity distribution and/or power transmission network and filter for telecommunication over power lines
WO2000007304A2 (fr) * 1998-07-27 2000-02-10 Siemens Aktiengesellschaft Dispositif servant a transformer un premier signal electrique en un deuxieme signal electrique et dispositif servant a transformer un signal electrique a moduler en un premier signal electrique

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE40492E1 (en) 2000-02-10 2008-09-09 Telkonet Communications, Inc. Power line telephony exchange
US6975212B2 (en) 2001-10-02 2005-12-13 Telkonet Communications, Inc. Method and apparatus for attaching power line communications to customer premises
US7091831B2 (en) 2001-10-02 2006-08-15 Telkonet Communications, Inc. Method and apparatus for attaching power line communications to customer premises
WO2005109669A1 (fr) * 2004-04-14 2005-11-17 Telkonet, Inc. Procede et appareil d'installation d'un reseau de communication par cables electriques
CN101765268A (zh) * 2009-11-20 2010-06-30 深圳华智测控技术有限公司 基于自动路由技术的电力载波照明控制系统

Also Published As

Publication number Publication date
AU2000227915A1 (en) 2001-09-17
EP1264419A1 (fr) 2002-12-11
CN1451207A (zh) 2003-10-22
IL151506A0 (en) 2003-04-10
BR0017145A (pt) 2002-12-10

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