WO2014193286A1 - Methods and system for data transmission via electricity networks - Google Patents

Methods and system for data transmission via electricity networks Download PDF

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Publication number
WO2014193286A1
WO2014193286A1 PCT/SE2014/000071 SE2014000071W WO2014193286A1 WO 2014193286 A1 WO2014193286 A1 WO 2014193286A1 SE 2014000071 W SE2014000071 W SE 2014000071W WO 2014193286 A1 WO2014193286 A1 WO 2014193286A1
Authority
WO
WIPO (PCT)
Prior art keywords
method
conductor
system
characterized
accordance
Prior art date
Application number
PCT/SE2014/000071
Other languages
French (fr)
Inventor
Nils-Arne Lindström
Original Assignee
Qt Systems Ab
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
Priority to SE1300392A priority Critical patent/SE536959C2/en
Priority to SE1300392-6 priority
Application filed by Qt Systems Ab filed Critical Qt Systems Ab
Publication of WO2014193286A1 publication Critical patent/WO2014193286A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/54Systems for transmission via power distribution lines
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2203/00Indexing scheme relating to line transmission systems
    • H04B2203/54Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5425Methods of transmitting or receiving signals via power distribution lines improving S/N by matching impedance, noise reduction, gain control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2203/00Indexing scheme relating to line transmission systems
    • H04B2203/54Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462Systems for power line communications
    • H04B2203/5466Systems for power line communications using three phases conductors

Abstract

A method for transmitting data via the electricity grid, which includes at least a first electrical conductor and at least one second electrical conductor, with at least one system that includes at least one transmitter / receiver and at least a second transmitter / receiver which is connected to the conductors. The first electrical conductor consists of a neutral conductor and the second conductor comprises a protective ground conductor and to those at a point in relation to the rest of the grid is short circuited with each other, and to increased impedance induced on the carrier used is connected to the neutral and protective earth.

Description

METHODS AND SYSTEM FOR DATA TRANSMISSION VIA ELECTRICTY NETWORKS

Technical field

The present invention relates to a method for transmitting data (communication) via electricity networks in accordance with the claims.

Technical Background

Through the ages, a number of systems and procedures for transferring data and control components over power lines have been developed. When transmitting data via power line with known systems and procedures, it usually occurs by a carrier is injected through at least one of the mains phases and at least one electrical conductor, such as a second phase.

One problem with communicating via power line with known systems is that the

communication is affected by varying load on the phase or loads on the phases. All loads on the transformer secondary side are charged to the carrier wave and they can generate interference so that the signal cannot be detected. This limits the reliability of communication and / or control of existing systems and procedures.

Another problem with power line communications systems with known types of systems and procedures is that they risk being disturbed by other similar systems are connected online. Another problem with existing designs is that they might disturb other systems of control (communications) that are plugged into the electrical network. There is thus a need for a device that does not interfere with or disturbed so easily by other system connected to the grid.

More specifically, it is present in conjunction with control of engine heaters specific problems. One of these problems is the difficulty of reading the consumption of each engine heater.

Thus, there is a problem with the uncertainty about the control signals reached the respective causes of malfunctions which may be due to the triggering of personal safety without the information reaches the move because of interference from other vices. Prior art

The patent US7937065 describes a system to communicate between pluralities of

communications boxes in electrical network. The system comprises at least one box which, via the zero and one conductor to transfer data to at least a second box (unit) which can receive the transmitted data. The system has similarities to this use mains zero for transferring data. The design of the patent, however, differs to a significant extent from the construction in accordance with the present application.

The large overall difference between the system of the patent and the present invention is that the system of the patent has the ambition to communicate between buildings while the present invention has the opposite aim to communicate only within limited cabling. In Sweden does not work this construction when the zero and protection earth usually are short circuited at the property connection. The technical difference is that the invention of this application relates to inject the signal between neutral conductor and earth conductor without restriction in the distribution, while the present invention induces a barrier (impedance of the carrier frequency) on the neutral conductor to carry the data transfer.

The patent US7061136 discloses a system for communicating over power lines in a building. When communication via the power lines, this is for example, done through the zero conductor. The system differs materially from the method according to the present patent application. For example, the system uses at least one phase of communication.

Also in the patent US5933073 describes a variant of a device and method for communicating over power lines. The device and method of the patent differs materially from the examined structure. For example, a phase in the communication.

The patent WO9930434 describes a system to communicate via the power line.

Communication is meant to be between a power company and individual households. The system of patent differs materially from the system according to the invention.

The patent GB2094598 describes a transmission system for transmitting digital signals over an electrical distribution network. The system can be used for control and components, and for reading purposes. The system differs from the system of the present application. Although a number of different types of procedures, systems and devices to transmit data over power lines have been developed, there are still a number of problems with existing methods, systems and devices.

The object of the present invention

The main object of the present invention is to provide an improved method for transferring data through the electrical network which solves or reduces one or more of the above problems. The object is achieved by a method in accordance with claims.

Brief Description of the Figures

In the following detailed description of the present invention, references and references to the following figures will be made. These figures are briefly described in the following figure list. Note that the figures are schematic, and that the details of these may be omitted as is apparent to one skilled in the field invention relates.

Figures 1 and 2 is schematically illustrated a first embodiment of a method for

communicating over a power line.

Figure 2 shows schematically a part of a system for communication via the electricity network in accordance with the present invention.

Detailed Description of Invention

Referring to the figures illustrated schematically a method and system, one for data transfer via the neutral conductor 2, or the protective ground conductor 3, in a local electricity network (wiring). The design includes an enclosed cable pairs 4 consisting of a neutral conductor 2 and a ground conductor 3 over which a data transfer with the appropriate carrier frequency occurs.

The Method for communication with the electric consumers occurs via the neutral conductor by inducing increased impedance 5 with the same, or substantially together resonance frequency as the carrier frequency used. The impedance 5 can be induced on the neutral wire 2 or protective earth 3 without galvanic coupling in, or adjacent (to) a distribution box 6.

In order to prevent, or reduce, the system of the present invention is disturbed by, or interfere with other power line communicated systems coupled neutral conductor 2, and protecting the earth together. This may be done in a fuse 6 or similar. When an increased impedance of the carrier frequency is induced in a wire will be the carrier frequency is injected and detected between the zero conductor 2 and the protective earth conductor 3 along the wire (conductor).

The carrier frequency is expected to be detected at distances of 500 meters. A suitable frequency for the carrier frequency is assumed to be approximately 125 kHz but also works with both lower and higher frequencies. It is for example conceivable that the carrier frequency is between 3 kHz and 148.5 kHz in accordance with any frequency according to CENELEC EN 50065-1.

The procedure implemented for example by a system comprising at least a transmitter / receiver unit and at least a second transmitter / receiver unit which is connected to the conductors. One transmitter / receiver units comprises a master 7 and at least a second transmitter / receiver units comprises a slave unit 8. Master unit 7 and slave unit (slave units) 8 preferably communicate bidirectional with each other via the electrical network.

In alternate embodiments, multiple masters slaves 7 and 8 included in the system.

In the detailed description of the present invention, the construction details being omitted as is apparent to one skilled in the field device relates. Such obvious construction details are included to the extent necessary for a proper function to be obtained for the present invention. Although certain preferred embodiments have been shown in more detail, variations and modifications of the method and apparatus are apparent to those skilled in the art the invention relates. All such modifications and variations are considered as falling within the scope of the following claims.

Advantages of the invention

With the present invention a number of advantages are achieved. The most obvious is that an improved variant of the method for communication over power lines is obtained. Another advantage of the present invention to the communications field delimited. A further advantage of the present method is that it is insensitive to the disturbances occurring in different phases by different loads. A further advantage of the present invention is that the system has a low cost relative to known systems. A further advantage of the system can be expanded to an arbitrary number of transmitters / receivers. The method also has the advantage that this allows bidirectional communication.

Claims

Claims
1. Method for transmitting data via the electricity network, comprising at least a first electrical conductor and at least a second electrical conductors, with at least a system comprising at least a transmitter / receiver and at least a second transmitter / receiver which is connected to the conductors characterized by the first electrical conductor consists of a neutral conductor (2) and the second conductor comprises a protective earth conductor (3) and that these at one point in relation to the rest of the electrical is short circuited with each other, and to an increased impedance (5) induced the carrier wave used in one of the conductors.
2. Method in accordance with claim 1 characterized by that the elevated impedance induced for the carrier used in the neutral conductor (2).
3. Method in accordance with one of the preceding claims characterized by that the impedance resonance frequency corresponds to the used carrier frequency.
4. Method in accordance with at least one of the preceding claims characterized by that the carrier frequency is within the range of 3 kHz to 148.5 kHz.
5. Method in accordance with claim 4 characterized by that the carrier frequency is about 125 kHz.
6. Method in accordance with at least one of the preceding claims characterized by that the system comprises at least one master unit and multiple slave units.
7. Method in accordance with at least one of the preceding claims characterized by that communication is bidirectional.
8. System for implementing the method according to at least one of the preceding claims characterized by that the system comprises at least a first transmitter / receiver unit forming the master (7) and at least a second transmitter / receiver unit which is the slave device (8) which communicate with each other via the first electrical conductor and second electrical conductor
PCT/SE2014/000071 2013-05-29 2014-05-28 Methods and system for data transmission via electricity networks WO2014193286A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE1300392A SE536959C2 (en) 2013-05-29 2013-05-29 Method and system for transmitting data via the electricity network
SE1300392-6 2013-05-29

Publications (1)

Publication Number Publication Date
WO2014193286A1 true WO2014193286A1 (en) 2014-12-04

Family

ID=51869936

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2014/000071 WO2014193286A1 (en) 2013-05-29 2014-05-28 Methods and system for data transmission via electricity networks

Country Status (2)

Country Link
SE (1) SE536959C2 (en)
WO (1) WO2014193286A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141673A2 (en) * 1983-11-07 1985-05-15 Emlux Limited Filtering electrical signals
US5694108A (en) * 1996-05-01 1997-12-02 Abb Power T&D Company Inc. Apparatus and methods for power network coupling
US5933073A (en) * 1997-07-07 1999-08-03 Abb Power T&D Company Inc. Apparatus and methods for power network coupling
US7061136B2 (en) * 2000-04-19 2006-06-13 Interessengemeinschaft für Rundfunkschutzrechte GmbH Schutzrechtsverwertung & Co. KG Method and device for conditioning electric installations in buildings for the rapid transmission of data

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141673A2 (en) * 1983-11-07 1985-05-15 Emlux Limited Filtering electrical signals
US5694108A (en) * 1996-05-01 1997-12-02 Abb Power T&D Company Inc. Apparatus and methods for power network coupling
US5933073A (en) * 1997-07-07 1999-08-03 Abb Power T&D Company Inc. Apparatus and methods for power network coupling
US7061136B2 (en) * 2000-04-19 2006-06-13 Interessengemeinschaft für Rundfunkschutzrechte GmbH Schutzrechtsverwertung & Co. KG Method and device for conditioning electric installations in buildings for the rapid transmission of data

Also Published As

Publication number Publication date
SE1300392A1 (en) 2014-11-11
SE536959C2 (en) 2014-11-11

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