GB2154329A - Power metering system and method - Google Patents

Power metering system and method

Info

Publication number
GB2154329A
GB2154329A GB08507289A GB8507289A GB2154329A GB 2154329 A GB2154329 A GB 2154329A GB 08507289 A GB08507289 A GB 08507289A GB 8507289 A GB8507289 A GB 8507289A GB 2154329 A GB2154329 A GB 2154329A
Authority
GB
United Kingdom
Prior art keywords
voltage
vars
metering
signal
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
GB08507289A
Other versions
GB8507289D0 (en
GB2154329B (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
Priority claimed from US06/518,820 external-priority patent/US4542354A/en
Priority claimed from US06/518,832 external-priority patent/US4573037A/en
Priority claimed from US06/543,095 external-priority patent/US4709375A/en
Application filed by ROBINTON PROD Inc, ROBINTON PRODUCTS Inc filed Critical ROBINTON PROD Inc
Publication of GB8507289D0 publication Critical patent/GB8507289D0/en
Publication of GB2154329A publication Critical patent/GB2154329A/en
Application granted granted Critical
Publication of GB2154329B publication Critical patent/GB2154329B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • G01R21/133—Arrangements for measuring electric power or power factor by using digital technique

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Analogue/Digital Conversion (AREA)
  • Amplifiers (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Amplitude Modulation (AREA)

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.
GB08507289A 1983-08-01 1984-07-24 Power metering system and method Expired GB2154329B (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US06/518,820 US4542354A (en) 1983-08-01 1983-08-01 Delta-sigma pulse modulator with offset compensation
US06/518,832 US4573037A (en) 1983-08-01 1983-08-01 Analog-to digital converter and method
US53655883A 1983-09-27 1983-09-27
US06/543,095 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 GB2154329A (en) 1985-09-04
GB2154329B GB2154329B (en) 1988-05-05

Family

ID=27504546

Family Applications (5)

Application Number Title Priority Date Filing Date
GB08507289A Expired GB2154329B (en) 1983-08-01 1984-07-24 Power metering system and method
GB08620426A Expired GB2178545B (en) 1983-08-01 1986-08-22 Offset compensation
GB08620427A Expired GB2178260B (en) 1983-08-01 1986-08-22 Modulator for converting input signal to pulse train
GB08620428A Expired GB2178177B (en) 1983-08-01 1986-08-22 A system for multiplying signals together
GB08620429A Expired GB2178261B (en) 1983-08-01 1986-08-22 A converter for producing magnitude and polarity information

Family Applications After (4)

Application Number Title Priority Date Filing Date
GB08620426A Expired GB2178545B (en) 1983-08-01 1986-08-22 Offset compensation
GB08620427A Expired GB2178260B (en) 1983-08-01 1986-08-22 Modulator for converting input signal to pulse train
GB08620428A Expired GB2178177B (en) 1983-08-01 1986-08-22 A system for multiplying signals together
GB08620429A Expired GB2178261B (en) 1983-08-01 1986-08-22 A converter for producing magnitude and polarity information

Country Status (9)

Country Link
CA (1) CA1253968A (en)
CH (1) CH672847A5 (en)
DE (5) DE3448182C2 (en)
FR (4) FR2555318B1 (en)
GB (5) GB2154329B (en)
IT (1) IT1176528B (en)
NL (1) NL8420205A (en)
SE (5) SE452516B (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 ELECTRICITY METER.
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, 80333 München Terminal block for an electrical device
DE19630605A1 (en) * 1996-07-29 1998-02-05 Tech Gmbh Antriebstechnik Und Multiplication circuit for power measuring device
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 in an offset error-prone measurement of the coil current of an electromagnetic actuator

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
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
US4315254A (en) * 1979-01-29 1982-02-09 Takeda Riken Kogyo Kabushiki Kaisha Self-compensating A-D converter
US4315212A (en) * 1978-07-06 1982-02-09 Tokyo Shibaura Denki Kabushiki Kaisha Electronic watthour meter
US4322687A (en) * 1980-05-19 1982-03-30 Bell Telephone Laboratories, Incorporated Operational amplifier with improved offset correction

Family Cites Families (20)

* Cited by examiner, † Cited by third party
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 Electronic kWh counter
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 München Electronic alternating current meter
SE7810662L (en) * 1978-01-24 1979-07-25 Zolotenko Vladimir A DEVICE FOR ZERO LEVEL CORRECTIVE AMOUNT OF A PULSE VOLTAGE
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
JPS571972A (en) 1980-06-04 1982-01-07 Toshiba Corp Electronic type electric energy meter
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, 5620 Velbert 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
SE8504814D0 (en) 1985-10-16
GB8620426D0 (en) 1986-10-01
SE8504815L (en) 1985-10-16
SE453129B (en) 1988-01-11
CA1253968A (en) 1989-05-09
GB2178260B (en) 1988-05-05
GB2178261B (en) 1988-05-05
GB8620427D0 (en) 1986-10-01
FR2555382A1 (en) 1985-05-24
DE3490349T1 (en) 1985-09-19
IT1176528B (en) 1987-08-18
GB8507289D0 (en) 1985-05-01
SE8501603D0 (en) 1985-04-01
GB2178545B (en) 1988-05-05
GB8620428D0 (en) 1986-10-01
SE8501603L (en) 1985-04-01
SE8504814L (en) 1985-10-16
CH672847A5 (en) 1989-12-29
DE3448182C2 (en) 1988-09-29
WO1985000711A1 (en) 1985-02-14
NL8420205A (en) 1985-06-03
SE8504816L (en) 1985-10-16
SE8504813D0 (en) 1985-10-16
GB2178545A (en) 1987-02-11
FR2555318A1 (en) 1985-05-24
DE3448184C2 (en) 1989-11-23
FR2555318B1 (en) 1989-03-03
DE3448183C2 (en) 1988-07-21
GB8620429D0 (en) 1986-10-01
DE3448185C2 (en) 1988-03-24
SE8504816D0 (en) 1985-10-16
GB2178177A (en) 1987-02-04
SE8504815D0 (en) 1985-10-16
GB2178260A (en) 1987-02-04
FR2555381A1 (en) 1985-05-24
SE452516B (en) 1987-11-30
FR2555379A1 (en) 1985-05-24
GB2178261A (en) 1987-02-04
SE8504813L (en) 1985-10-16
GB2154329B (en) 1988-05-05
IT8422167A0 (en) 1984-08-01
GB2178177B (en) 1988-05-05

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Legal Events

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

Effective date: 19920724