GB2154329A - Power metering system and method - Google Patents

Power metering system and method

Info

Publication number
GB2154329A
GB2154329A GB8507289A GB8507289A GB2154329A GB 2154329 A GB2154329 A GB 2154329A GB 8507289 A GB8507289 A GB 8507289A GB 8507289 A GB8507289 A GB 8507289A GB 2154329 A GB2154329 A GB 2154329A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
voltage
vars
signal
metering
output
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
GB8507289A
Other versions
GB2154329B (en )
GB8507289D0 (en )
Inventor
Michael Alan Robinton
Alan Starkie
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.)
ROBINTON PROD Inc
ROBINTON PRODUCTS Inc
Original Assignee
ROBINTON PROD INC
ROBINTON PRODUCTS Inc
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

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00Arrangements for measuring electric power or power factor
    • G01R21/133Arrangements for measuring electric power or power factor by using digital technique

Abstract

The metering system and method provides an electronic power meter for simultaneously producing digital pulse trains proportional to power and to VARS or Q. In the preferred embodiment, the metering system employs delta-minus-sigma modulation of the voltage signal which produces a modulated output signal used for gating the analog current signal, multiplying voltage and current. The product of voltage and current is then supplied to another delta-minus-sigma modulator (90), which serves as a convertor outputting a pulse train. The converter (90) produces separate pulse trains for each polarity of the power being measured. VARS or Q readings are produced by delaying the output of the modulator (30) by a selected amount to produce the necessary voltage lag, after which the delayed modulated signal is supplied to another multiplying gate. A second converter (90) is used to output VARS and Q. A metering method is also disclosed, as well as an offset compensation system (70, C1) for use with metering systems.
GB8507289A 1983-08-01 1984-07-24 Power metering system and method Expired GB2154329B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US06518820 US4542354A (en) 1983-08-01 1983-08-01 Delta-sigma pulse modulator with offset compensation
US06518832 US4573037A (en) 1983-08-01 1983-08-01 Analog-to digital converter and method
US53655883 true 1983-09-27 1983-09-27
US06543095 US4709375A (en) 1983-09-27 1983-10-18 Digital phase selection system for signal multipliers
PCT/US1984/001149 WO1985000711A1 (en) 1983-08-01 1984-07-24 Power metering system and method

Publications (3)

Publication Number Publication Date
GB8507289D0 GB8507289D0 (en) 1985-05-01
GB2154329A true true GB2154329A (en) 1985-09-04
GB2154329B GB2154329B (en) 1988-05-05

Family

ID=27504546

Family Applications (5)

Application Number Title Priority Date Filing Date
GB8507289A Expired GB2154329B (en) 1983-08-01 1984-07-24 Power metering system and method
GB8620427A Expired GB2178260B (en) 1983-08-01 1986-08-22 Modulator for converting input signal to pulse train
GB8620429A Expired GB2178261B (en) 1983-08-01 1986-08-22 A converter for producing magnitude and polarity information
GB8620428A Expired GB2178177B (en) 1983-08-01 1986-08-22 A system for multiplying signals together
GB8620426A Expired GB2178545B (en) 1983-08-01 1986-08-22 Offset compensation

Family Applications After (4)

Application Number Title Priority Date Filing Date
GB8620427A Expired GB2178260B (en) 1983-08-01 1986-08-22 Modulator for converting input signal to pulse train
GB8620429A Expired GB2178261B (en) 1983-08-01 1986-08-22 A converter for producing magnitude and polarity information
GB8620428A Expired GB2178177B (en) 1983-08-01 1986-08-22 A system for multiplying signals together
GB8620426A Expired GB2178545B (en) 1983-08-01 1986-08-22 Offset compensation

Country Status (6)

Country Link
CA (1) CA1253968A (en)
DE (5) DE3448185C2 (en)
FR (4) FR2555318B1 (en)
GB (5) GB2154329B (en)
NL (1) NL8420205A (en)
WO (1) WO1985000711A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240102A3 (en) * 1986-03-31 1988-07-27 Robinton Products Inc. Power meter having self-test function
DE3772501D1 (en) * 1986-09-19 1991-10-02 Siemens Ag Electronic elektrizitaetszaehler.
US4951052A (en) * 1989-07-10 1990-08-21 General Electric Company Correction of systematic error in an oversampled analog-to-digital converter
US5200752A (en) * 1991-07-18 1993-04-06 Hewlett-Packard Company Integrating analog to digital converter run-up method and system
DE9406292U1 (en) * 1993-12-09 1994-06-16 Siemens Ag Terminal block for an electrical appliance
DE19630605A1 (en) * 1996-07-29 1998-02-05 Tech Gmbh Antriebstechnik Und Multiplication circuit for power meter
EP0942271A1 (en) * 1998-03-10 1999-09-15 Oxford Instruments (Uk) Limited Improvements in resistance thermometry
DE19938779B4 (en) * 1999-08-16 2007-06-21 Siemens Ag Circuit and method for determining the offset error at an offset erroneous measurement of the coil current of an electromagnetic actuating device

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US3070786A (en) * 1958-08-21 1962-12-25 Thompson Ramo Wooldridge Inc Drift compensating circuits
US3414818A (en) * 1964-06-03 1968-12-03 Int Standard Electric Corp Companding pulse code modulation system
US3461406A (en) * 1966-07-05 1969-08-12 Motorola Inc Delta modulator using operational integration
US3859654A (en) * 1972-10-11 1975-01-07 Ibm Analog to digital converter for electrical signals
US3942110A (en) * 1974-05-08 1976-03-02 General Electric Company Analog to pulse rate converter
US3955138A (en) * 1974-11-06 1976-05-04 General Electric Company Electronic energy consumption meter with input transformer having single resistance terminated secondary winding coupled to C-MOS switches driven by pulse width modulated control signals
US3975682A (en) * 1974-12-13 1976-08-17 Esterline Corporation Watt/watthour transducer and integrator and current sources therefor
US4009475A (en) * 1974-12-05 1977-02-22 Hybrid Systems Corporation Delta-sigma converter and decoder
US4031532A (en) * 1975-12-29 1977-06-21 First David J Voltage to frequency converter
US4083043A (en) * 1976-02-18 1978-04-04 Trw Inc. High speed monolithic a/d converter utilizing strobe comparator
US4203071A (en) * 1978-08-08 1980-05-13 The Charles Stark Draper Laboratory, Inc. Pseudo-random-number-code-detection and tracking system
US4215311A (en) * 1976-12-16 1980-07-29 Te Ka De Felten & Guilleaume Fernmeldeanlagen Gmbh Adaptive delta-modulation system
US4217545A (en) * 1975-06-20 1980-08-12 Nihon Denki Keiki Kenteisho Electronic type polyphase electric energy meter
US4291300A (en) * 1979-11-01 1981-09-22 Burroughs Corporation Tracking analog-to-digital converter for AC signals
US4291409A (en) * 1978-06-20 1981-09-22 The Mitre Corporation Spread spectrum communications method and apparatus
US4298984A (en) * 1976-10-06 1981-11-03 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Method and apparatus for improving error rate on radio teletype circuits
US4315212A (en) * 1978-07-06 1982-02-09 Tokyo Shibaura Denki Kabushiki Kaisha Electronic watthour meter
US4315254A (en) * 1979-01-29 1982-02-09 Takeda Riken Kogyo Kabushiki Kaisha Self-compensating A-D converter
US4322687A (en) * 1980-05-19 1982-03-30 Bell Telephone Laboratories, Incorporated Operational amplifier with improved offset correction

Family Cites Families (19)

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Publication number Priority date Publication date Assignee Title
US3470471A (en) * 1968-05-31 1969-09-30 Canadian Patents Dev Polarity coincidence correlation method and apparatus for measuring electrical energy
US3895376A (en) * 1971-10-26 1975-07-15 Iwatsu Electric Co Ltd Dual slope integrating analog to digital converter
US3794917A (en) * 1972-03-09 1974-02-26 Esterline Corp Electronic watt transducer
GB1373581A (en) * 1973-01-05 1974-11-13 Hunter R D Wattmeters
US3875508A (en) * 1973-09-07 1975-04-01 Gen Electric Metering electrical energy (kWh) in single phase systems
DE2348667B2 (en) * 1973-09-27 1975-08-14 Siemens Ag, 1000 Berlin Und 8000 Muenchen
US3914591A (en) * 1974-04-19 1975-10-21 Bell Telephone Labor Inc Analog electronic multiplier
JPS535678A (en) * 1976-07-03 1978-01-19 Shoei Denki Kk Device for measuring active and reactive components of aac current or power
DE2747385C2 (en) * 1977-10-21 1983-12-29 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
US4182983A (en) * 1978-07-11 1980-01-08 Westinghouse Electric Corp. Electronic AC electric energy measuring circuit
DE2846598A1 (en) * 1978-10-26 1980-04-30 Stepper & Co TDM system to measure electrical power and energy - uses two pulsed logic units t- control voltage and current signal for device integration
US4217546A (en) * 1978-12-11 1980-08-12 General Electric Company Electronic energy consumption meter and system with automatic error correction
US4275349A (en) * 1979-05-11 1981-06-23 Westinghouse Electric Corp. Watt and var transducer
US4463311A (en) * 1980-05-29 1984-07-31 Tokyo Shibaura Denki Kabushiki Kaisha Electronic electric-energy meter
JPH0335627B2 (en) * 1980-06-04 1991-05-28 Tokyo Shibaura Electric Co
CA1199070A (en) * 1980-10-06 1986-01-07 Prentice G. Moore Electronic watt/var transducer
DE3110119A1 (en) * 1981-03-16 1982-09-23 Em Elektro Mechanik Gmbh Indicator of the direction of power flow
US4495463A (en) * 1982-02-24 1985-01-22 General Electric Company Electronic watt and/or watthour measuring circuit having active load terminated current sensor for sensing current and providing automatic zero-offset of current sensor DC offset error potentials
US4485353A (en) * 1982-05-28 1984-11-27 Rca Corporation PLL Oscillator synchronizing system with matrix for phase correction

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3070786A (en) * 1958-08-21 1962-12-25 Thompson Ramo Wooldridge Inc Drift compensating circuits
US3414818A (en) * 1964-06-03 1968-12-03 Int Standard Electric Corp Companding pulse code modulation system
US3461406A (en) * 1966-07-05 1969-08-12 Motorola Inc Delta modulator using operational integration
US3859654A (en) * 1972-10-11 1975-01-07 Ibm Analog to digital converter for electrical signals
US3942110A (en) * 1974-05-08 1976-03-02 General Electric Company Analog to pulse rate converter
US3955138A (en) * 1974-11-06 1976-05-04 General Electric Company Electronic energy consumption meter with input transformer having single resistance terminated secondary winding coupled to C-MOS switches driven by pulse width modulated control signals
US4009475A (en) * 1974-12-05 1977-02-22 Hybrid Systems Corporation Delta-sigma converter and decoder
US3975682A (en) * 1974-12-13 1976-08-17 Esterline Corporation Watt/watthour transducer and integrator and current sources therefor
US4217545A (en) * 1975-06-20 1980-08-12 Nihon Denki Keiki Kenteisho Electronic type polyphase electric energy meter
US4031532A (en) * 1975-12-29 1977-06-21 First David J Voltage to frequency converter
US4083043A (en) * 1976-02-18 1978-04-04 Trw Inc. High speed monolithic a/d converter utilizing strobe comparator
US4298984A (en) * 1976-10-06 1981-11-03 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Method and apparatus for improving error rate on radio teletype circuits
US4215311A (en) * 1976-12-16 1980-07-29 Te Ka De Felten & Guilleaume Fernmeldeanlagen Gmbh Adaptive delta-modulation system
US4291409A (en) * 1978-06-20 1981-09-22 The Mitre Corporation Spread spectrum communications method and apparatus
US4315212A (en) * 1978-07-06 1982-02-09 Tokyo Shibaura Denki Kabushiki Kaisha Electronic watthour meter
US4203071A (en) * 1978-08-08 1980-05-13 The Charles Stark Draper Laboratory, Inc. Pseudo-random-number-code-detection and tracking system
US4315254A (en) * 1979-01-29 1982-02-09 Takeda Riken Kogyo Kabushiki Kaisha Self-compensating A-D converter
US4291300A (en) * 1979-11-01 1981-09-22 Burroughs Corporation Tracking analog-to-digital converter for AC signals
US4322687A (en) * 1980-05-19 1982-03-30 Bell Telephone Laboratories, Incorporated Operational amplifier with improved offset correction

Also Published As

Publication number Publication date Type
GB2154329B (en) 1988-05-05 grant
GB2178177B (en) 1988-05-05 grant
DE3490349T1 (en) 1985-09-19 grant
WO1985000711A1 (en) 1985-02-14 application
FR2555382A1 (en) 1985-05-24 application
DE3448182C2 (en) 1988-09-29 grant
FR2555379A1 (en) 1985-05-24 application
CA1253968A (en) 1989-05-09 grant
GB2178177A (en) 1987-02-04 application
GB8620429D0 (en) 1986-10-01 grant
GB2178261A (en) 1987-02-04 application
GB8620426D0 (en) 1986-10-01 grant
GB8620427D0 (en) 1986-10-01 grant
NL8420205A (en) 1985-06-03 application
GB2178545A (en) 1987-02-11 application
FR2555318A1 (en) 1985-05-24 application
DE3448183C2 (en) 1988-07-21 grant
GB2178260B (en) 1988-05-05 grant
CA1253968A1 (en) grant
GB2178260A (en) 1987-02-04 application
GB2178261B (en) 1988-05-05 grant
GB2178545B (en) 1988-05-05 grant
FR2555318B1 (en) 1989-03-03 grant
GB8620428D0 (en) 1986-10-01 grant
DE3448184C2 (en) 1989-11-23 grant
DE3448185C2 (en) 1988-03-24 grant
GB8507289D0 (en) 1985-05-01 grant
FR2555381A1 (en) 1985-05-24 application

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920724