CA2269688A1 - Electrical energy meter oscillator compensation - Google Patents

Electrical energy meter oscillator compensation

Info

Publication number
CA2269688A1
CA2269688A1 CA002269688A CA2269688A CA2269688A1 CA 2269688 A1 CA2269688 A1 CA 2269688A1 CA 002269688 A CA002269688 A CA 002269688A CA 2269688 A CA2269688 A CA 2269688A CA 2269688 A1 CA2269688 A1 CA 2269688A1
Authority
CA
Canada
Prior art keywords
oscillator
accuracy
clock signal
processor
compensation factor
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
CA002269688A
Other languages
French (fr)
Other versions
CA2269688C (en
Inventor
Rodney C. Hemminger
Peter Richard Rogers
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.)
Elster Solutions LLC
Original Assignee
Abb Power T & D Company Inc.
Rodney C. Hemminger
Peter Richard Rogers
Asea Brown Boveri Inc.
Abb Inc.
Elster Electricity, L.L.C.
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 Abb Power T & D Company Inc., Rodney C. Hemminger, Peter Richard Rogers, Asea Brown Boveri Inc., Abb Inc., Elster Electricity, L.L.C. filed Critical Abb Power T & D Company Inc.
Publication of CA2269688A1 publication Critical patent/CA2269688A1/en
Application granted granted Critical
Publication of CA2269688C publication Critical patent/CA2269688C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
    • G01R11/30—Dynamo-electric motor meters
    • G01R11/32—Watt-hour meters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
    • 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

Abstract

Methods and apparatus for metering electrical energy are disclosed in an electronic meter which includes a first oscillator for generating a first clock signal within a first accuracy and a second oscillator for generating a second clock signal within a second accuracy. A processor, operable in relation to a clock signal, measures time and periodically compensates for the accuracy of the first oscillator. The first clock signal is used for measuring time when power is applied to the meter and the second clock signal is used by the processor for measuring time when power has been removed from the meter. The accuracy of the first oscillator is compensated periodically in relation to a compensation factor stored in memory.
In one embodiment, the processor includes a counter for counting from a first value to a second value in response to the first clock signal. In such an arrangement, the processor substitutes the first compensation factor for the first value. The meter can further include a timer, wherein the processor substitutes the first compensation factor for the first value in response to the first timer. The processor also is shown to implement a process for compensating for the accuracy of the second oscillator. This process compensates for the accuracy of the second oscillator in relation to the first oscillator. To this end, the process calculates a second compensation factor. The second compensation factor is determined when power is applied to the meter, wherein after power has been removed and restored, the second compensation factor is used to compensate time measured in relation to the second oscillator during the period power had been removed.
CA002269688A 1996-10-22 1997-10-01 Electrical energy meter oscillator compensation Expired - Fee Related CA2269688C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/735,164 US6005384A (en) 1996-10-22 1996-10-22 Methods and apparatus for oscillator compensation in an electrical energy meter
US08/735,164 1996-10-22
PCT/US1997/017966 WO1998018012A2 (en) 1996-10-22 1997-10-01 Electrical energy meter oscillator compensation

Publications (2)

Publication Number Publication Date
CA2269688A1 true CA2269688A1 (en) 1998-04-30
CA2269688C CA2269688C (en) 2004-02-24

Family

ID=24954629

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002269688A Expired - Fee Related CA2269688C (en) 1996-10-22 1997-10-01 Electrical energy meter oscillator compensation

Country Status (9)

Country Link
US (1) US6005384A (en)
KR (1) KR100421298B1 (en)
CN (1) CN1111743C (en)
AR (1) AR008893A1 (en)
AU (1) AU4607897A (en)
BR (1) BR9712559B1 (en)
CA (1) CA2269688C (en)
HK (1) HK1023619A1 (en)
WO (1) WO1998018012A2 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6597394B1 (en) * 1997-11-16 2003-07-22 Pictos Technologies, Inc. Programmable image transform processor for digital image processing
DE59811948D1 (en) * 1998-05-28 2004-10-21 Landis & Gyr Ag Zug Method for deriving a frequency of a clock signal
US6633237B2 (en) * 2001-02-05 2003-10-14 Analog Devices, Inc. Methods and apparatus for data transfer in electronic energy meters
US9342054B2 (en) * 2011-03-31 2016-05-17 Maxim Integrated Products, Inc. Apparatus and method of keeping time of day over an industrial temperature range
CN102324785A (en) * 2011-08-15 2012-01-18 南通林洋电气有限公司 Novel comprehensive power monitor and installation device and installation method thereof
US9778286B2 (en) * 2013-05-21 2017-10-03 The Research Foundation For The State University Of New York Sensors for power distribution network and electrical grid monitoring system associated therewith
US9395776B2 (en) 2013-06-25 2016-07-19 Halliburton Energy Services, Inc. Compensating system time loss
CN103364632A (en) * 2013-06-25 2013-10-23 乐清市人和电气科技有限公司 Intelligent digital display instrument
CN108614410B (en) * 2018-05-04 2021-05-04 华北科技学院 Internet of things monitoring asynchronous time service residual counting synchronous starting measurement method
RU2739717C1 (en) * 2020-07-23 2020-12-28 Федеральное государственное бюджетное научное учреждение "Федеральный научный агроинженерный центр ВИМ" (ФГБНУ ФНАЦ ВИМ) Timer - mobile portable three-phase electric meter with data transmission radio channel

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4301508A (en) * 1979-03-28 1981-11-17 Eaton Corp. Digital processing system for time-of-day and demand meter display
US5216357A (en) * 1987-04-10 1993-06-01 Schlumberger Industries, Inc. Real time solid state register having battery backup
US4902964A (en) * 1987-09-21 1990-02-20 Landis & Gyr Metering, Inc. Program clock for an electronic demand register with automatic calibration based on sensed line frequency
US4987363A (en) * 1989-09-25 1991-01-22 Landis & Gyr Metering, Inc. Electric energy meter with power outage recovery circuit
US4973901A (en) * 1990-04-05 1990-11-27 General Electric Company Compensating for power outrage in electric energy meter
US5248935A (en) * 1991-05-20 1993-09-28 Kabushiki Kaisha Toshiba Electronic type watthour meter including automatic measuring-error correcting function
MX9206230A (en) * 1992-02-21 1993-09-01 Abb Power T & D Co IMPROVEMENTS IN AN ELECTRICAL ACTIVITY METER AND METHODS FOR THE USE OF THE SAME.

Also Published As

Publication number Publication date
CN1234119A (en) 1999-11-03
CN1111743C (en) 2003-06-18
BR9712559B1 (en) 2011-10-18
KR20000052724A (en) 2000-08-25
CA2269688C (en) 2004-02-24
KR100421298B1 (en) 2004-03-10
AR008893A1 (en) 2000-02-23
AU4607897A (en) 1998-05-15
WO1998018012A2 (en) 1998-04-30
US6005384A (en) 1999-12-21
WO1998018012A3 (en) 1998-10-15
BR9712559A (en) 2000-03-28
HK1023619A1 (en) 2000-09-15

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20161003