SE7508239L - INSTALLATION FOR TRANSMISSION OF INFORMATION OVER THE ELECTRIC POWER - Google Patents
INSTALLATION FOR TRANSMISSION OF INFORMATION OVER THE ELECTRIC POWERInfo
- Publication number
- SE7508239L SE7508239L SE7508239A SE7508239A SE7508239L SE 7508239 L SE7508239 L SE 7508239L SE 7508239 A SE7508239 A SE 7508239A SE 7508239 A SE7508239 A SE 7508239A SE 7508239 L SE7508239 L SE 7508239L
- Authority
- SE
- Sweden
- Prior art keywords
- cycles
- pulses
- zero
- cycle
- amplitude
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/542—Systems for transmission via power distribution lines the information being in digital form
-
- 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
- H02J13/0001—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 modification of a parameter of the network power signal
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
- H05B47/185—Controlling the light source by remote control via power line carrier transmission
-
- 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
- H04B2203/542—Methods of transmitting or receiving signals via power distribution lines using zero crossing information
-
- 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
-
- 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Control Of Electrical Variables (AREA)
- Power Conversion In General (AREA)
- Electronic Switches (AREA)
- Electrotherapy Devices (AREA)
Abstract
1500891 Signalling over power lines GENERAL ELECTRIC CO Ltd 16 July 1975 [18 July 1974] 31964/74 Heading H4R Signalling over power lines is effected by reducing the amplitude of selected cycles of the power waveform, throughout the same small portion of the cycle period including a voltage zero by drawing current from the system only throughout that portion. As described, the amplitude is reduced for a period not greater than one tenth of one cycle of the power supply at a negative-topositive going zero-crossing by firing a thyristor connected across the power supply. At the transmitter Fig. 5, the mains voltage across LN is differentiated and phase-shifted by 90 degrees in R21, C21 then squared I to produce positive pulses corresponding to positive mains half-cycles. The trailing edges of the pulses trigger a timer 2 producing further pulses of such duration that their trailing edges define the angle at which the thyristor is to be fired. The firing pulses are generated at 3 and gated to the firing transformer T1 when the code generator is operative and detectors 7, 8 confirm that the zero-crossing is in the proper direction and the waveform amplitude is below a predetermined value. The information code is such as to modify the first cycle for START, three selected odd cycles out of cycles 3 to 23 for ADDRESS and an odd cycle out of cycles 25 to 31 for DATA. At the receiver Fig. 7, the mains voltage is applied across R9, R10 to begin charging capacitor C4 when TR4 is turned off at each negative-topositive zero crossing. Diode D4 prevents overcharging. Capacitor C5 charges to the peak value held in C4 via D5 and TR5. Resistor R13 acts as a slow bleed to C5 and any charging current from C4 to C5 is monitored via TR5 and TR6 to provide an output G which lacks a pulse at the instant that the power waveform is modified. To control TR4, transistor TRI is off during negative half-cycles across LN and therefore produces a pulse train B whose amplitude equals the bias voltage + V. The trailing edges occur at negative-to-positive zero crossings and cause TR2 to turn off, allowing C2 to charge until TR2 turns on again. This therefore produces control pulses for driver TR3 to control TR4.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB31964/74A GB1500891A (en) | 1974-07-18 | 1974-07-18 | Systems for transmitting information in an alternating current electricity supply system |
Publications (1)
Publication Number | Publication Date |
---|---|
SE7508239L true SE7508239L (en) | 1976-01-19 |
Family
ID=10331019
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7508239A SE7508239L (en) | 1974-07-18 | 1975-07-18 | INSTALLATION FOR TRANSMISSION OF INFORMATION OVER THE ELECTRIC POWER |
Country Status (9)
Country | Link |
---|---|
AU (1) | AU500793B2 (en) |
CA (1) | CA1054946A (en) |
CH (1) | CH595728A5 (en) |
DE (1) | DE2531897A1 (en) |
FR (1) | FR2279274A1 (en) |
GB (1) | GB1500891A (en) |
IT (1) | IT1041304B (en) |
SE (1) | SE7508239L (en) |
ZA (1) | ZA754638B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1600056A (en) * | 1978-03-14 | 1981-10-14 | Texas Instruments Ltd | Communication via an electricity supply main |
GB2031624B (en) | 1978-08-15 | 1982-03-31 | Rovex Ltd | Remote control of electrical devices |
DE2849269C2 (en) * | 1978-11-14 | 1980-11-27 | Gema Ag, Apparatebau, St. Gallen (Schweiz) | Process for powder spraying and pneumatic powder spraying device |
NZ195708A (en) * | 1979-12-07 | 1984-04-27 | Gen Electric Co Ltd | Receiver for detection of ac signalling voltage reductions at zero crossings |
EP0046395B1 (en) * | 1980-08-18 | 1985-02-13 | THE GENERAL ELECTRIC COMPANY, p.l.c. | Dimming system for electric discharge lamps |
US5670931A (en) * | 1994-06-17 | 1997-09-23 | Baker Hughes Incorporated | Method and apparatus for transmitting data over a power cable utilizing a magnetically saturable core reactor |
US8593266B2 (en) | 1999-07-01 | 2013-11-26 | Oilfield Equipment Development Center Limited | Power line communication system |
GB2511162B (en) * | 2013-12-04 | 2015-04-29 | Energy Assets Ltd | Signal demodulation |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1196906A (en) * | 1966-06-29 | 1970-07-01 | Merseyside And North Wales Ele | Improvements in or relating to Control Systems |
-
1974
- 1974-07-18 GB GB31964/74A patent/GB1500891A/en not_active Expired
-
1975
- 1975-07-17 CH CH939475A patent/CH595728A5/xx not_active IP Right Cessation
- 1975-07-17 DE DE19752531897 patent/DE2531897A1/en not_active Withdrawn
- 1975-07-17 CA CA231,716A patent/CA1054946A/en not_active Expired
- 1975-07-17 IT IT68876/75A patent/IT1041304B/en active
- 1975-07-17 AU AU83143/75A patent/AU500793B2/en not_active Expired
- 1975-07-18 ZA ZA00754638A patent/ZA754638B/en unknown
- 1975-07-18 FR FR7522617A patent/FR2279274A1/en active Granted
- 1975-07-18 SE SE7508239A patent/SE7508239L/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
CA1054946A (en) | 1979-05-22 |
FR2279274A1 (en) | 1976-02-13 |
AU8314375A (en) | 1977-01-20 |
GB1500891A (en) | 1978-02-15 |
DE2531897A1 (en) | 1976-02-05 |
FR2279274B1 (en) | 1982-01-22 |
ZA754638B (en) | 1976-07-28 |
AU500793B2 (en) | 1979-05-31 |
CH595728A5 (en) | 1978-02-28 |
IT1041304B (en) | 1980-01-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
SE7508239L (en) | INSTALLATION FOR TRANSMISSION OF INFORMATION OVER THE ELECTRIC POWER | |
GB1214800A (en) | A circuit for producing a pulse train of variable phase angle synchronous with an a.c. signal | |
GB1106800A (en) | Controller | |
GB984567A (en) | Inverter system | |
GB1015006A (en) | Improvements in or relating to control means for electric motors | |
GB1013803A (en) | Pulse type regulating system for generators | |
GB1084934A (en) | Firing circuit for controlled rectifiers | |
JPS5698371A (en) | Polyphase ac inverter | |
GB1136789A (en) | Power supply circuit for an x-ray generator | |
EP0097711A1 (en) | Switching voltage regulator with transient reduction circuit. | |
GB628367A (en) | Method and arrangement for converting time-modulated electric pulses into amplitude-modulated pulses | |
SU1190489A1 (en) | Synchronization pulse generator | |
US3634748A (en) | Static inverter circuits | |
GB1079525A (en) | Speed control system for centrifuge motors and the like | |
GB1511264A (en) | Ignition systems for internal combustion engines | |
GB1152811A (en) | Power Supply System for D.C. Motors | |
ES366019A1 (en) | Voltage regulator employing triacs and diodes in a full wave rectifier | |
SU394902A1 (en) | DEVICE OF CHARGING OF THE ACCUMULATING CAPACITOR | |
GB1457148A (en) | Circuit arrangement for the rapid charging of an accumulator | |
GB1288587A (en) | ||
FR2319249A1 (en) | Synchronous control of a static switch - overcomes parasitic effects at zero crossing by superposition of ramp and train of trapezoidal waveforms | |
US3425613A (en) | System for controlling the starting and stopping of a capstan | |
SU1545202A1 (en) | Simulator of dc power source active load | |
GB1196061A (en) | Improvements in or relating to the Operation of Electro-Magnetic Coils. | |
SU547022A1 (en) | Pulse reverse contactless motor control sequential excitation |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
NAV | Patent application has lapsed |
Ref document number: 7508239-6 Effective date: 19791212 |