GB2005118A - Generating signal currents in AC power lines - Google Patents

Generating signal currents in AC power lines

Info

Publication number
GB2005118A
GB2005118A GB7838795A GB7838795A GB2005118A GB 2005118 A GB2005118 A GB 2005118A GB 7838795 A GB7838795 A GB 7838795A GB 7838795 A GB7838795 A GB 7838795A GB 2005118 A GB2005118 A GB 2005118A
Authority
GB
United Kingdom
Prior art keywords
power lines
switching
generating signal
signal currents
signal
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.)
Granted
Application number
GB7838795A
Other versions
GB2005118B (en
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.)
Electricity Council
Original Assignee
Electricity Council
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 Electricity Council filed Critical Electricity Council
Priority to GB7838795A priority Critical patent/GB2005118B/en
Publication of GB2005118A publication Critical patent/GB2005118A/en
Application granted granted Critical
Publication of GB2005118B publication Critical patent/GB2005118B/en
Expired 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
    • 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
    • H04B2203/5404—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

Abstract

In order to signal along an AC power line, a load 10 is switched in and out at a predetermined rate by a switch 11. The phase of switching the load is reversed at each cross over of the supply waveform, by applying a swaure wave switching signal 17 and second square wave 20 in phase with the supply waveform to the inputs of an exclusive OR gate 21. In the remitting signal current produced in the supply line, 57% of the total r.m.s. current is at the frequency of the predetermined switching rate. <IMAGE>
GB7838795A 1977-07-07 1978-09-29 Generating signal currents in ac power lines Expired GB2005118B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7838795A GB2005118B (en) 1977-07-07 1978-09-29 Generating signal currents in ac power lines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2861377 1977-07-07
GB7838795A GB2005118B (en) 1977-07-07 1978-09-29 Generating signal currents in ac power lines

Publications (2)

Publication Number Publication Date
GB2005118A true GB2005118A (en) 1979-04-11
GB2005118B GB2005118B (en) 1982-01-06

Family

ID=26259481

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7838795A Expired GB2005118B (en) 1977-07-07 1978-09-29 Generating signal currents in ac power lines

Country Status (1)

Country Link
GB (1) GB2005118B (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0018334A1 (en) * 1979-04-12 1980-10-29 Handelsbolaget Light Regulation Apparatus for transmitting information on an alternating current line
US5410720A (en) * 1992-10-28 1995-04-25 Alpha Technologies Apparatus and methods for generating an AC power signal for cable TV distribution systems
US5532525A (en) * 1994-06-02 1996-07-02 Albar, Inc. Congeneration power system
US5638244A (en) * 1993-10-29 1997-06-10 Alpha Technologies, Inc. Apparatus and methods for generating uninterruptible AC power signals
US5739595A (en) * 1992-10-28 1998-04-14 Alpha Technologies, Inc. Apparatus and methods for generating an AC power signal for cable tv distribution systems
US5760495A (en) * 1995-02-22 1998-06-02 Alpha Technologies, Inc. Inverter/charger circuit for uninterruptible power supplies
US9633781B2 (en) 2010-02-18 2017-04-25 Alpha Technologies Inc. Ferroresonant transformer for use in uninterruptible power supplies
US9812900B2 (en) 2011-01-23 2017-11-07 Alpha Technologies Inc. Switching systems and methods for use in uninterruptible power supplies
US10074981B2 (en) 2015-09-13 2018-09-11 Alpha Technologies Inc. Power control systems and methods
US10103571B2 (en) 2011-01-23 2018-10-16 Alpha Technologies Inc. Uninterruptible power supplies for use in a distributed network
US10381867B1 (en) 2015-10-16 2019-08-13 Alpha Technologeis Services, Inc. Ferroresonant transformer systems and methods with selectable input and output voltages for use in uninterruptible power supplies
US10635122B2 (en) 2017-07-14 2020-04-28 Alpha Technologies Services, Inc. Voltage regulated AC power supply systems and methods

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9234916B2 (en) 2012-05-11 2016-01-12 Alpha Technologies Inc. Status monitoring cables for generators

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0018334A1 (en) * 1979-04-12 1980-10-29 Handelsbolaget Light Regulation Apparatus for transmitting information on an alternating current line
US5410720A (en) * 1992-10-28 1995-04-25 Alpha Technologies Apparatus and methods for generating an AC power signal for cable TV distribution systems
US5739595A (en) * 1992-10-28 1998-04-14 Alpha Technologies, Inc. Apparatus and methods for generating an AC power signal for cable tv distribution systems
US5638244A (en) * 1993-10-29 1997-06-10 Alpha Technologies, Inc. Apparatus and methods for generating uninterruptible AC power signals
US5642002A (en) * 1993-10-29 1997-06-24 Alpha Technologies Apparatus and methods for generating uninterruptible AC power signals
US5532525A (en) * 1994-06-02 1996-07-02 Albar, Inc. Congeneration power system
US5760495A (en) * 1995-02-22 1998-06-02 Alpha Technologies, Inc. Inverter/charger circuit for uninterruptible power supplies
US10819144B2 (en) 2010-02-18 2020-10-27 Alpha Technologies Services, Inc. Ferroresonant transformer for use in uninterruptible power supplies
US9633781B2 (en) 2010-02-18 2017-04-25 Alpha Technologies Inc. Ferroresonant transformer for use in uninterruptible power supplies
US9812900B2 (en) 2011-01-23 2017-11-07 Alpha Technologies Inc. Switching systems and methods for use in uninterruptible power supplies
US10103571B2 (en) 2011-01-23 2018-10-16 Alpha Technologies Inc. Uninterruptible power supplies for use in a distributed network
US10355521B2 (en) 2011-01-23 2019-07-16 Alpha Technologies Services, Inc. Switching systems and methods for use in uninterruptible power supplies
US10790665B2 (en) 2015-09-13 2020-09-29 Alpha Technologies Services, Inc. Power control systems and methods
US10074981B2 (en) 2015-09-13 2018-09-11 Alpha Technologies Inc. Power control systems and methods
US10381867B1 (en) 2015-10-16 2019-08-13 Alpha Technologeis Services, Inc. Ferroresonant transformer systems and methods with selectable input and output voltages for use in uninterruptible power supplies
US10635122B2 (en) 2017-07-14 2020-04-28 Alpha Technologies Services, Inc. Voltage regulated AC power supply systems and methods

Also Published As

Publication number Publication date
GB2005118B (en) 1982-01-06

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940929