GB1242205A - Methods of co-ordinating a plurality of audio frequency signal transmitting stations in an electric power supply network - Google Patents

Methods of co-ordinating a plurality of audio frequency signal transmitting stations in an electric power supply network

Info

Publication number
GB1242205A
GB1242205A GB2983/70A GB298370A GB1242205A GB 1242205 A GB1242205 A GB 1242205A GB 2983/70 A GB2983/70 A GB 2983/70A GB 298370 A GB298370 A GB 298370A GB 1242205 A GB1242205 A GB 1242205A
Authority
GB
United Kingdom
Prior art keywords
voltage
frequency
pilot
subharmonic
supply
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.)
Expired
Application number
GB2983/70A
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.)
Landis and Gyr AG
Original Assignee
Landis and Gyr 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 Landis and Gyr AG filed Critical Landis and Gyr AG
Publication of GB1242205A publication Critical patent/GB1242205A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/10—Control of transmission; Equalising by pilot signal
    • 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
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00007—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission
    • H02J13/00009—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission using pulsed signals
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/121—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using the power network as support for the transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Radio Relay Systems (AREA)

Abstract

1,242,205. Signalling over power lines. LANDIS & GYR A.G. 21 Jan., 1970 [28 Jan., 1969], No. 2983/70. Heading H4R. Transmitting stations of audio-frequency signals, used for indication or control purposes, superimposed on a power supply network are co-ordinated by frequency dividing the supply voltage to produce a subharmonic of a pilot voltage at a central station and distributing it to each transmitting station where the pilot voltage is formed from the subharmonic and the audio-frequency signals are derived from the pilot voltage. As shown, the central station 1 has an input 3 at supply frequency fn which is converted in frequency divider 4 into a voltage at frequency fs which is a subharmonic of both the supply voltage and a pilot voltage. This voltage is used to amplitude modulate at 5 a carrier frequency voltage generated in oscillator 6 and this modulated voltage is transmitted after amplification at 7, 8 along individual paths 9 to transmitting stations 2. On receipt of the modulated voltage it is filtered and demodulated at 10, 11 respectively to reproduce the subharmonic voltage. From this voltage the pilot voltage is produced in frequency multiplier 13 and supplied to an audio frequency transmitter which superimposes a signal on the power network to provide the required indication or control. Any phase difference which occurs due to the length of a particular transmission path is corrected by comparison with the phase of the supply voltage.
GB2983/70A 1969-01-28 1970-01-21 Methods of co-ordinating a plurality of audio frequency signal transmitting stations in an electric power supply network Expired GB1242205A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH123969A CH481532A (en) 1969-01-28 1969-01-28 Method for the coordination of several audio frequency heterodyne broadcasting stations

Publications (1)

Publication Number Publication Date
GB1242205A true GB1242205A (en) 1971-08-11

Family

ID=4205723

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2983/70A Expired GB1242205A (en) 1969-01-28 1970-01-21 Methods of co-ordinating a plurality of audio frequency signal transmitting stations in an electric power supply network

Country Status (4)

Country Link
JP (1) JPS5023134B1 (en)
CH (1) CH481532A (en)
DE (1) DE1951444C3 (en)
GB (1) GB1242205A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10025986A1 (en) * 2000-05-25 2001-12-06 Siemens Ag Mobile radio system with synchronized base stations

Also Published As

Publication number Publication date
DE1951444A1 (en) 1971-01-28
JPS5023134B1 (en) 1975-08-05
DE1951444C3 (en) 1975-04-10
CH481532A (en) 1969-11-15
DE1951444B2 (en) 1974-08-15

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